Winco WL18000VE-03/A Administrator Guide

WL18000VE-03/A
GENERATOR
INSTALLATION & OPERATORS
MANUAL
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If you should ever need to contact us concerning this unit, it will
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MODEL _________________________________________________
SERIAL NUMBER _________________________________________
PURCHASE DATE _________________________________________
DEALER NAME ___________________________________________
DEALER PHONE # ________________________________________
WINCO INC. • 225 S. CORDOVA AVE • LE CENTER, MN 56057 • 507-357-6821
OPM-138/B

2
OPM-138/B
TABLE OF CONTENTS
SAVE THESE INSTRUCTIONS 2
SAFETY INFORMATION 3
CALIFORNIA PROPOSITION 65
ANSI SAFETY DEFINITIONS
SPECIFICATIONS 4
GENERATOR
ENGINE
TESTING POLICY 4
INTRODUCTION 4
INTENDED USES
RESTRICTED USES
UNIT CAPABILITIES 5
GENERATOR CONNECTIONS
STARTING ELECTRIC MOTORS
PREPARING THE UNIT 5
UNPACKING
LUBRICATION
OIL RECOMMENDATIONS
OIL ALERT SYSTEM
GASOLINE
BATTERY INSTALLATION
BATTERY CHARGING
OPTIONAL DOLLY KIT
INITIAL START UP 7
BASIC OPERATION
STARTING HINTS
CONNECTING THE LOADS 9
APPLYING THE LOADS
GROUNDING
WIRING
YOURGEN 10
ENGINE CARE 12
MAINTENANCE SCHEDULE
CHECKING THE OIL LEVEL
CHANGING THE OIL
DUAL ELEMENT AIR FILTER
SPARK PLUG
CARBON CANISTER
GENERATOR CARE 14
EXERCISING THE GENERATOR
GENERATOR MAINTENANCE
CLEANING
TROUBLESHOOTING 14
CONTROL PANEL WIRING DIAGRAM
15
24 MONTH LIMITED WARRANTY 16
SAVE THESE INSTRUCTIONS
This manual contains important instructions that should
be followed during installation and maintenance of the
generator. Read and understand all instructions in the
manual before starting and operating the generator.
USING THIS MANUAL
Congratulations on your choice of a WINCO generator.
You have selected a high-quality, precision-engineered
generator designed and tested to give you years of
satisfactory service.
To get the best performance from your new generator, it is
important that you carefully read and follow the operating
instructions in this manual.
Should you experience a problem please follow the
“Troubleshooting Tables” near the end of this manual.
The warranty listed in the manual describes what you can
expect from WINCO should you need service assistance in
the future.

3OPM-138/B
SAFETY INFORMATION
SAVE THESE INSTRUCTIONS
This engine generator set has been designed and
manufactured to allow safe, reliable performance. Poor
maintenance, improper or careless use can result in
potentially deadly hazards; from electrical shock, exhaust
gas asphyxiation, or fire. Please read all safety instructions
carefully before installation or use. Keep these instructions
handy for future reference. Take special note and follow all
warnings on the unit labels and in the manuals.
CALIFORNIA PROPOSITION 65
WARNING: This product contains crude oil,
gasoline, diesel fuel and other petroleum
products, Antifreeze to which can expose you
to chemicals including toluene and benzene,
Ethylene glycol (ingested) which are known to the
State of California to cause cancer, birth defects or other
reproductive harm and developmental issues.
For more information go to www.P65Warning.ca.gov.
ANSI SAFETY DEFINITIONS
DANGER: indicates an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
This signal word is to be limited to the most extreme
situations.
WARNING: indicates a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION: indicates a potentially hazardous situation
which, if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe practices.
1. ELECTRICAL SHOCK -
The output voltage present in this equipment can cause
fatal electric shock. This equipment must be operated by a
responsible person.
A. Do not allow anyone to operate the generator
without proper instruction.
B. Guard against electric shock.
C. Avoid contact with live terminals or receptacles.
D. Use extreme care if operating this unit in rain or
snow.
E. Use only three-pronged grounded receptacles
and extension cords.
F. Be sure the unit is properly grounded to an
external ground rod driven into the earth.
2. FIRE HAZARD -
Gasoline and other fuels present a hazard of possible
explosion and/or fire.
A. Do not refuel when the engine is running or hot.
B. Keep fuel containers out of reach of children.
C. Do not smoke or use open flame near the generator
set or fuel tank.
D. Keep a fire extinguisher nearby and know its proper
use. Fire extinguishers rated ABC by NFPA are
appropriate.
E. Store fuel only in an approved container, and only in
a well ventilated area.
F. Follow local codes for closeness to combustible
material.
3. DEADLY EXHAUST GAS -
Exhaust fumes from any gasoline engine contain carbon
monoxide, an invisible, odorless and deadly gas that must
be mixed with fresh air.
A. Operate only in well ventilated areas.
B. Never operate indoors including attached garages
C. Never operate the unit in such a way as to allow
exhaust gases to seep back into closed rooms (i.e.
through windows, walls, floors).
4. NOISE HAZARD -
Excessive noise is not only tiring, but continual exposure
can lead to loss of hearing.
A. Use hearing protection when working around this
equipment for long periods of time.
B. Keep your neighbors in mind when using this
equipment.
5. CLEANLINESS -
Keep the generator and surrounding area clean.
A. Remove all grease, ice, snow or materials that create
slippery conditions around the unit.
B. Remove any rags or other materials that could create
a potential fire hazard.
C. Carefully clean up any gas or oil spills before starting
the unit.
6. SERVICING EQUIPMENT -
All service, including the installation or replacement of
service parts, should be performed only by a qualified
technician.
A. Use only factory approved repair parts.
B. Do not work on this equipment when fatigued.
C. Never remove the protective guards, covers, or
receptacle panels while the engine is running.
D. Use extreme caution when working on electrical
components. High output voltage from this
equipment can cause serious injury or death.
E. Always avoid hot mufflers, exhaust manifolds, and
engine parts. They can cause severe burns instantly.
F. The use of the engine-generator set must comply
with all national, state, and local codes.

4
OPM-138/B
INTRODUCTION
INTENDED USES
This engine generator set has been designed primarily for
portable heavy duty commercial use. Both 120 volt and 240
volt receptacles are provided in the control panel to plug
in your loads (lights, portable tools, and small appliances).
These units are dual wound generators, therefore the
120 volt loads must be equally split with 1/2 of the rated
capacity available on each of the two 120 volt circuits.
This portable unit requires large quantities of fresh air for
cooling the engine and generator. For safety, long life and
adequate performance, these units should never be run in
small compartments without positive fresh air flow.
RESTRICTED USES
DO NOT remove from the cradle assembly. Removal of the
generator from the cradle assembly may cause excessive
vibration and damage to the engine-generator set.
DO NOT operate and/or store the unit outside during
inclement weather without adequate protection from the
elements. Failure to do so will damage the unit.
DO NOT install and operate this generator in a small
compartment, i.e. generator compartments of vehicles,
motor homes or travel trailers. These compartments
will not allow enough free flow of fresh air to reach the
engine generator set for cooling and will cause the unit to
overheat, damaging both the engine and generator. Small
compartments will also develop hot spots where there is
very little air flow and may cause a fire.
PLEASE NOTE There are 3rd party companies making
enclosures for generators that have been properly
engineered. The use of these 3rd party enclosures is
acceptable as long as they have been certified and meet
current code.
DO NOT attempt to operate at 50 cycles. These units are
designed and governed to operate at 60 cycles only.
SPECIFICATIONS
GENERATOR
Model WL18000VE-03/A
Surge Watts 18,000
Continuous Watts 15,000
Volts 120/240
Amps 125/62.5
Generator Manufacturer Mecc Alte Spa
Generator Model Number S20FS-230/A
Part Number 16428-002
Rotor Resistance 8.04 Ohms
Stator Resistance 0.056 Ohms
Cap Winding Resistance 0.41 Ohms
Capacitors (1) 31.5 mF
(2) 35 mF
Capacitor Part Number 300323-112
300323-212
ENGINE
Engine Manufacturer Briggs & Stratton
Engine Model Number 543477
Type & Code 0002-J1
Spark Plugs 491055
Air Filter 692519
Air Filter Pre-Cleaner 692520
Oil Filter 842921
Spark Plug Gap 0.030 in
Intake Valve Clearance 0.005 - 0.008 in
Exhaust Valve Clearance 0.004 - 0.006 in
Oil Capacity 78 - 80 oz (2.4 - 2.5 qts)
TESTING POLICY
Before any generator is shipped from the factory, it is fully
checked for performance. The generator is loaded to its
full capacity, and the voltage, current, and frequency are
carefully checked.
Rated output of generator is based on engineering tests
of typical units, and is subject to, and limited by, the
temperature, altitude, fuel, and other conditions specified
by the manufacturer of applicable engines.

5OPM-138/B
UNIT CAPABILITIES
GENERATOR CONNECTIONS
WL18000VE-03/A: 120 Volt and 240 Volt receptacles are
provided for connection to various loads. The diagram
below represents this 15,000 watt (rated output) generator.
A & B represent the 120 volt output legs of this generator.
Up to 7,500 watts at 120 volts (62.5 Amps) can be drawn
from the receptacles attached to either A or B output legs.
This generator is capable of producing 62.5 Amps of 240
volt current at C. Check the appliance or tool nameplates for
the current and voltage to insure compatibility. Remember
that power taken from C reduces the power available at
equally both A and B and vice versa.
STARTING ELECTRIC MOTORS
Electric motors require much more current (amps) to start
them than to run them. Some motors, particularly low cost
split-phase motors, are very hard to start and require 5 to 7
times as much starting current as running current. Capacitor
motors are easier to start and usually require 2 to 4 times
as much starting current as running current. Repulsion
Induction motors are the easiest to start and require only 1
1/2 to 2 1/2 times as much starting as running current.
Most fractional horsepower motors take about the same
amount of current to run them whether they are Repulsion
Induction (RI), Capacitor (Cap), or Split-Phase (SP) type.
If the electric motor is connected to a hard starting load
such as an air compressor, it will require more starting
current. If it is connected to a light load, or no load such as
a power saw, it will require less starting current. The exact
requirement will also vary with the brand or design of the
motor.
Self-exciting generators respond to severe overloading
differently than utility power. When overloaded, the engine
is not able to supply enough power to bring the electric
motor up to operating speed. The generator responds with
high initial starting current, but the engine speed drops
sharply. The overload may stall the engine. If allowed to
operate at very low speeds, the electric motor starting
winding will burn out in a short time. The generator
winding might also be damaged.
CAUTION: EQUIPMENT DAMAGE
Running the generator set under these conditions may
result in damage to the generator stator as well as the
motor winding.
The heavy surge of current required for starting motors
is required for only an instant. The generator will not be
damaged if it can bring the motor up to speed in a few
seconds of time. If difficulty is experienced in starting
motors, turn all other electrical loads off and if possible
reduce the load on the electric motor.
PREPARING THE UNIT
UNPACKING
CAUTION: EQUIPMENT DAMAGE
THIS UNIT HAS BEEN SHIPPED WITH OIL. Failure to
maintain the engine oil at the proper level will result in
serious engine damage.
When you unpack your engine-generator set be sure to
remove all the information sheets and manuals from the
carton.
1. As you receive your unit, it is critical to check it for any
damage. If any damage is noted, it is always easiest to
refuse the shipment and let WINCO take care of the
freight claim. If you sign for the unit, the transfer of the
ownership requires that you file the freight claim
2. Before proceeding with the preparations of your new
generator for operation, take a couple of minutes to
ensure the unit you have received is the correct model
and review the specification pages in this manual to
ensure that this unit meets your job requirements.
LUBRICATION
Before starting the engine, fill the crankcase to the proper
level with a good quality oil. The recommended grade oil
and quantity of oil required is listed in the engine operator’s
manual and under the service tab in this manual. The
engine normally holds 57 to 58 ounces (2.4 to 2.5 quarts) of
oil. Since there is some trapped in the engine, when filling
the crankcase the first time, use the dipstick (‘A’ in following
image) to ensure that you do not over fill the crankcase.
The full oil level mark on the dipstick is depicted in the
following image as ‘B’.
5
3110-00 60706-239
Self-exciting generators respond to severe overload-
ing differently than utility power. When overloaded,
the engine is not able to supply enough power to
bring the electric motor up to operating speed. The
generator responds with high initial starting current,
but the engine speed drops sharply. The overload
may stall the engine. If allowed to operate at very low
speeds, the electric motor starting winding will burn
out in a short time. The generator winding might also
be damaged.
CAUTION: EQUIPMENT DAMAGE
RUNNING THE GENERATOR SET UNDER
THESE CONDITIONS MAY RESULT IN DAMAGE
TO THE GENERATOR STATOR AS WELL AS THE
MOTOR WINDING.
The heavy surge of current required for starting mo-
tors is required for only an instant. The generator will
not be damaged if it can bring the motor up to speed
in a few seconds of time. If difficulty is experienced in
starting motors, turn all other electrical loads off and if
possible reduce the load on the electric motor.
PREPARING THE UNIT
UNPACKING
CAUTION: EQUIPMENT DAMAGE
THIS UNIT HAS BEEN SHIPPED WITHOUT OIL.
Failure to maintain the engine oil at the proper level
will result in serious engine damage.
When you unpack your new engine-generator set be
sure to remove all the information sheets and manu-
als from the carton.
1. This generator-set was in good order when
shipped. Inspect the generator-set promptly after
receiving it. If any damage is noted, notify the trans-
portation company immediately; request proper pro-
cedures for filing a “concealed damage” claim. Title
to the equipment and responsibility for filing a claim
rests with you when a generator-set is sent F.O.B.
shipping point. Only you can legally file a claim.
2. Before proceeding with the preparations of your
new generator-set for operation, take a couple of
minutes to insure the unit you have received is the
correct model and review the specification pages in
this manual to insure that this unit meets your job
requirements.
LUBRICATION
Before starting the engine, fill the crankcase to the
proper level with a good quality oil. The recommend-
ed grade of oil and quantity of oil required is listed in
the engine operator’s manual and under the service
tab in this manual. This unit was shipped with most
of the oil removed. The engine normally holds 2.4 to
2.5 quarts of oil. Since there is some trapped oil in
the engine, when filling the crankcase the first time
use the dipstick (ref “A”) to ensure that you do not
over fill the crankcase. Reference “B” shows the full
oil level mark on the dipstick.
Oil is added to the engine by removing the oil fill cap
(ref “C”) and adding oil at this point. After filling the
crankcase to the proper level, be sure you properly
tighten the oil fill cap. NOTE: This engine generator
must be on a level surface before you check or add
oil to the system.
The necessity of using the correct oil, and keep-
ing the crankcase full cannot be overemphasized.
Engine failures resulting from inadequate or improper
lubricant are considered abuse and not covered by
the generator or engine manufacturer’s warranty.
Oil Recommendations
Outdoor temperatures determine the proper oil vis-
cosity for the engines. Use the chart to select the best
viscosity for the outdoor temperature range expected.
A
C
A
B
SAE 30
10W-30
Synthetic 5W-30
5W-30
°F°C

6
OPM-138/B
Oil is added to the engine by removing the oil cap and
adding oil at this point. After filling the crankcase to the
proper level, be sure you properly tighten the oil fill cap (‘C’).
NOTE: This engine generator must be on a level surface
before you check or add oil to the system.
The necessity of using the correct oil and keeping the
crankcase full cannot be overemphasized. Engine failures
resulting from inadequate or improper lubricant are
considered abuse and not covered by the generator or
engine manufacturer’s warranty.
OIL RECOMMENDATIONS
Outdoor temperatures determine the proper oil viscosity for
the engines. Use the chart to select the best viscosity for the
outdoor temperature range expected.
OIL ALERT SYSTEM
This generator is equipped with a low oil shutdown system.
This Briggs & Stratton engine uses an oil pressure switch
system. If the oil level drops below a certain point the low
oil module on the engine will shut it down. This low oil
warning system will automatically stop the engine before
the oil level reaches critical danger point. This feature is
designed to prevent costly repairs and downtime.
CAUTION: EQUIPMENT DAMAGE
Allowing the engine to shutdown repeatedly on low oil
level may cause excessive wear which can be cumulative.
GASOLINE
When using gasoline, always use fresh, clean, unleaded
fuel. The engine is certified to operate on unleaded gasoline
with a minimum octane rating of 87 or higher. Gasoline
containing no more the 10% ethanol is acceptable.
CAUTION: EQUIPMENT DAMAGE
Do not use unapproved gasolines, such as E15 or E85.
Do not mix oil in the gasoline. Use of unapproved fuels
will damage the engine compenents and void the engine
warranty.
5
3110-00 60706-239
Self-exciting generators respond to severe overload-
ing differently than utility power. When overloaded,
the engine is not able to supply enough power to
bring the electric motor up to operating speed. The
generator responds with high initial starting current,
but the engine speed drops sharply. The overload
may stall the engine. If allowed to operate at very low
speeds, the electric motor starting winding will burn
out in a short time. The generator winding might also
be damaged.
CAUTION: EQUIPMENT DAMAGE
RUNNING THE GENERATOR SET UNDER
THESE CONDITIONS MAY RESULT IN DAMAGE
TO THE GENERATOR STATOR AS WELL AS THE
MOTOR WINDING.
The heavy surge of current required for starting mo-
tors is required for only an instant. The generator will
not be damaged if it can bring the motor up to speed
in a few seconds of time. If difficulty is experienced in
starting motors, turn all other electrical loads off and if
possible reduce the load on the electric motor.
PREPARING THE UNIT
UNPACKING
CAUTION: EQUIPMENT DAMAGE
THIS UNIT HAS BEEN SHIPPED WITHOUT OIL.
Failure to maintain the engine oil at the proper level
will result in serious engine damage.
When you unpack your new engine-generator set be
sure to remove all the information sheets and manu-
als from the carton.
1. This generator-set was in good order when
shipped. Inspect the generator-set promptly after
receiving it. If any damage is noted, notify the trans-
portation company immediately; request proper pro-
cedures for filing a “concealed damage” claim. Title
to the equipment and responsibility for filing a claim
rests with you when a generator-set is sent F.O.B.
shipping point. Only you can legally file a claim.
2. Before proceeding with the preparations of your
new generator-set for operation, take a couple of
minutes to insure the unit you have received is the
correct model and review the specification pages in
this manual to insure that this unit meets your job
requirements.
LUBRICATION
Before starting the engine, fill the crankcase to the
proper level with a good quality oil. The recommend-
ed grade of oil and quantity of oil required is listed in
the engine operator’s manual and under the service
tab in this manual. This unit was shipped with most
of the oil removed. The engine normally holds 2.4 to
2.5 quarts of oil. Since there is some trapped oil in
the engine, when filling the crankcase the first time
use the dipstick (ref “A”) to ensure that you do not
over fill the crankcase. Reference “B” shows the full
oil level mark on the dipstick.
Oil is added to the engine by removing the oil fill cap
(ref “C”) and adding oil at this point. After filling the
crankcase to the proper level, be sure you properly
tighten the oil fill cap. NOTE: This engine generator
must be on a level surface before you check or add
oil to the system.
The necessity of using the correct oil, and keep-
ing the crankcase full cannot be overemphasized.
Engine failures resulting from inadequate or improper
lubricant are considered abuse and not covered by
the generator or engine manufacturer’s warranty.
Oil Recommendations
Outdoor temperatures determine the proper oil vis-
cosity for the engines. Use the chart to select the best
viscosity for the outdoor temperature range expected.
A
C
A
B
SAE 30
10W-30
Synthetic 5W-30
5W-30
°F°C
Use of fuels with content of ethanol greater than shown
above may cause starting and/or performance problems.
Always ensure that the fuel is clean and free of all
impurities.
WARNING: FIRE DANGER
Gasoline and its fumes are VERY explosive when proper
precautions are not taken.
Never use gasoline that has been stored for an extended
period of time as the fuel will lose its volatile properties
and you will be left with varnish residue. The varnish
like substance will clog the carburetor and will not burn
properly.
The use of fuel additives, such as Sta-Bil, or an equivalent
will minimize the formation of fuel gum deposits. If a unit
has been out of operation for an extended period of time,
it is best to drain old fuel from the engine and replace with
fresh fuel before attempting to start.
See the engine manual for special instruction for operating
this unit at over 5000 feet.
BATTERY INSTALLATION
This engine generator set is shipped with a battery tie down
kit for customer installation. This kit consists of a battery
tie down and hardware for installation of the customer
supplied battery on the unit.
If you intend to use the power plant’s electric start system,
you will need to purchase and install a battery to operate it.
A 12 Volt battery, group 26 rated at 500 CCA or larger is
recommended for this electric start engine-generator set.
Follow the battery manufacturers recommendations for
servicing and charging prior to use. Connect the battery to
the electric start system using the cables provided.
CAUTION: EQUIPMENT DAMAGE
These electric start engines are NEGATIVE GROUND. Use
extreme caution when connecting the battery. Connect the
NEGATIVE battery terminal to GROUND.
For your safety, always connect the positive battery cable to
the “bat+” terminal first. Then connect the negative battery
cable to the “bat-” terminal. Make sure all connections are
clean an tight. Reverse the sequence when disconnecting,
disconnect the negative cable first. These engines produce
3110-00 660706-239
* Below 40OF (4OC) the use of SAE30 will result in
hard starting.
** Above 80OF (27OC) the use of 10W-30 may cause
increased oil consumption. Check oil level more
frequently.
Briggs & Stratton recommends the use of their war-
ranty certified oils for best performance. Other high-
quality detergent oils are acceptable if classified for
service SF, SG, SH SJ or higher. Do not use special
additives.
GASOLINE
When using gasoline, always use fresh, clean,
unleaded fuel. This engine is certified to operate on
unleaded gasoline with a minimum octane rating of
87 or higher. Gasoline containing no more than 10%
ethanol is acceptable.
CAUTION: EQUIPMENT DAMAGE
Do not use unapproved gasolines, such as E15 or
E85. Do not mix oil in the gasoline. Use of unap-
proved fuels will damage the engine components
and void the engine warranty.
Use of fuels with content of ethanol greater than
shown above may cause starting and/or perfor-
mance problems. Always insure that the fuel is
clean and free of all impurities.
WARNING: FIRE DANGER
Gasoline and its fumes are VERY explosive when
proper precautions are not taken.
Never use gasoline that has been stored for an ex-
tended period of time as the fuel will lose its volatile
properties and you will be left with varnish residue.
The varnish like substance will clog the carburetor
and will not burn properly.
The use of fuel additives, such as STA-BIL, or an
equivalent will minimize the formation of fuel gum
deposits. If a unit has been out of operation for an
extended period of time, it is best to drain old fuel
from the engine and replace with fresh fuel before
attempting to start.
See the engine manual for special instruction for
operating this unit at over 5000 feet
BATTERY INSTALLATION
These engine generator sets are shipped with a bat-
tery rack, and battery cables installed. A battery tie
down kit is shipped loose with each unit.
You will need to purchase and install a battery to op-
erate this engine generator set. A twelve volt battery,
group 26 rated at 500 CCA or larger is recommended
for this electric start engine generator set. Follow the
battery manufacturer’s recommendations for servic-
ing and charging prior to use. Connect the battery to
the electric start system using the cables provided.
CAUTION: EQUIPMENT DAMAGE
These electric start engines are NEGATIVE
GROUND. Use extreme caution when connecting
the battery. Connect the NEGATIVE battery terminal
to GROUND.
For your safety always connect the positive battery
cable to the “bat+” terminal first. Then connect the
negative battery cable to the “bat-” terminal. Make
sure all connections are clean and tight. Reverse the
sequence when disconnecting, disconnect the nega-
tive cable first. These engines produce enough direct
current to keep a battery charged under normal oper-
ating conditions, but were not intended to be used as
a battery charger.

7OPM-138/B
enough direct current to keep the battery charged under
normal operating conditions, but were not intended to be
used as a battery charger.
WARNING: PERSONAL INJURY
Lead acid batteries produce explosive hydrogen gas when
charging. Keep sparks, flames, and burning cigarettes away
from the battery. Ventilate the area when charging or
using the battery in an enclosed space. Lead acid batteries
contain sulfuric acid, which causes severe burns. If acid
contacts eyes, skin, or clothing, flush well with water. For
contact with the eyes, get immediate medical attention.
BATTERY CHARGING
Units have a small flywheel charger built into the engine
flywheel assembly for recharging the starting battery. This
flywheel charger generates a small AC current that passes
through a diode assembly to produce DC charging current
of about 1 to 3 Amps. This circuit is not designed to be used
as a battery charging circuit to recharge dead batteries.
OPTIONAL DOLLY KIT
An optional 4-wheel dolly kit is available for this generator.
The dolly kit comes with instructions and parts list.
CAUTION: EQUIPMENT DAMAGE
Be sure to check the wheels properly before operating the
generator. Ensure the brake has been applied. Allowing the
unit to move will cause damage to the unit, drop cords or
loads.
INITIAL START UP
The throttle control on these generators is preset and
locked to operate at 3600 RPM (nominal) with no load
speed set at 3690 RPM. Only a trained service technician
should be allowed to adjust this speed setting.
NOTICE: ENGINE START LOCKOUT
This unit will not start if it is low on oil. The lubricating oil
level must be at the full mark before the engine will start
and run.
BASIC OPERATION
If the engine is cold and stiff or if the battery is not fully
charged, starting can be made easier by slowly hand
cranking the engine through the compression stroke before
pushing the starter switch. This permits the starter to gain
momentum before the heavy load of the compression
stroke occurs. This minimizes the drain on the battery and
improves the possibility of starting under such adverse
conditions. Always keep the battery charged, especially
during cold weather operation.
1. Check oil level, refill as needed.
2. Turn on the fuel supply. Ref “A”.
3. Engage the choke (“B”) by pulling it out. A warm
engine will require less choking than a cold engine.
4. Rotate the key switch (‘C’) briefly to the START
position. Repeat if necessary.
NOTE: The starter life is improved by using shorter cycles,
5 seconds maximum. Wait one (1) minute between start
cycles.
5. Gradually push the choke as the engine warms up.
6. The engine should promptly come up to operating
speed.
CAUTION: EQUIPMENT DAMAGE
Never permit the choke to remain on after the engine has
run for a short time. It is not necessary to choke the engine
when it is warm. Avoid over-choking.
7
3110-00 60706-239
WARNING: PERSONAL INJURY
Lead acid batteries produce explosive hydro-
gen gas when charging. Keep sparks, flames, and
burning cigarettes away from the battery. Ventilate
the area when charging or using the battery in an
enclosed space. Lead acid batteries contain sulfuric
acid, which causes severe burns. If acid contacts
eyes, skin or clothing, flush well with water. For con-
tact with eyes, get immediate medical attention.
BATTERY CHARGING
Units equipped with electric start have a small fly-
wheel charger built into the engine flywheel assem-
bly for recharging the starting battery. This flywheel
charger generates a small AC current that passes
through a diode assembly to produce a DC charg-
ing current of about 1 to 3 AMPS. This circuit is not
designed to be used as a battery charging circuit to
recharge dead batteries.
4 WHEEL DOLLY KIT (OPTIONAL)
The WL18000 is available with an optional 4 wheel
dolly kit. The dolly kit comes with instructions and
parts list. After installing the dolly kit, file the instruc-
tions and parts list in the back of this manual for
future reference.
CAUTION: EQUIPMENT DAMAGE
This is a four wheel dolly kit be sure to chock the
wheels properly before operating the generator.
Failure to properly restrict unit movement will allow
the unit to move causing damage to the unit, drop
cords or loads.
OIL ALERT SYSTEM
This WINCO Industrial generator is equipped stan-
dard with low oil shutdown systems. The Briggs and
Stratton engine uses an oil pressure switch system.
This low oil warning system will automatically stop
the engine before the oil level reaches a critical dan-
ger point. This feature is designed to prevent costly
repairs and downtime.
CAUTION: EQUIPMENT DAMAGE
Allowing the engine to shutdown repeatedly on
low oil level may cause excessive wear which can be
cumulative.
INITIAL START UP
The throttle control on these generators is preset
and locked to operate at 3600 RPM (nominal) with
no load speed set at 3690 RPM. Only a trained
service technician should be allowed to adjust this
speed setting.
NOTICE: ENGINE START LOCKOUT
This unit will not start if it is low on oil. The lu-
bricating oil level must be at the full mark before the
engine will start and run.
BASIC OPERATION
ELECTRIC STARTING
This engine is electric start only. The batteries must
be maintained in good condition to prevent hard
starting or damage to the engine mounted starter.
1. Check oil level, refill as needed
2. Turn on the fuel supply. Ref “A”
3. Move the choke to the full “on” position. A warm
engine will require less choking than a cold
engine. Ref “B”
A
BC
BC

8
OPM-138/B
STARTING HINTS
1. COLD WEATHER
A. Use the proper oil for the temperature expected.
B. Use fresh winter grade fuel. Winter grade gasoline is
blended to improve starting. Do not use summer grade
gasoline.
2. HOT WEATHER
A. Use the proper oil for the temperature expected.
B. Use only summer blended gasoline. Using gasoline left
over from winter may cause the unit to vapor lock.
STOPPING AND STORING
1. Move the key to the “OFF” position.
2. Turn off the fuel supply valve.
3. Before extended storage (over 30 days) certain
precautions must be taken to ensure the fuel doesn’t
deteriorate and clog the fuel system.
NOTE: The use of a fuel additive, such as Sta-Bil or
equivalent will minimize the formation of gum deposits
during storage. The additive may be added to gasoline in
the engines fuel tank or to gasoline in a storage container.
A. Add the fuel stabilizer to the fuel in the tank and run
for 2 minutes
to circulate the stabilizer throughout the fuel system.
B. If you choose to remove the remaining fuel from the
fuel tank, it must be drained into an approved
container.
C. Start the engine and allow it to run until all the fuel in
the carburetor and the fuel lines has been used up and
the engine stops.
NOTE: Running the engine to use up the fuel in the lines
and carburetor will still leave a small amount of fuel in
carburetor. It is best extended storage to treat the fuel
before draining.
D. While the engine is warm, drain the oil and refill with
fresh oil.
E. Clean dirt and chaff from cylinder, cylinder head fins,
blower housing, screen, and muffler areas.
F. Store in a clean and dry area.
OPERATING SPEED
The engine-generator must be run at the correct speed
in order to produce the proper electrical voltage and
frequency.
CAUTION: EQUIPMENT DAMAGE
The output voltage should be checked to ensure the
generator is working properly prior to connecting a load to
the generator. Failure to do so could result in damage to
equipment plugged into the unit and possible injury to the
individual.
All engines have a tendency to slow down when a load
is applied. When the electrical load is connected to the
generator, the engine is more heavily loaded, and as a
result, the speed drops slightly. This slight decrease in
speed, together with the voltage drop within the generator
itself, results in a slightly lower voltage when the generator
is loaded to its full capacity than when running no load.
The slight variation in speed also affects the frequency
of the output current. This frequency variation has no
appreciable effect in the operation of motors, lights, and
most appliances. However, electronic equipment and clocks
will be affected if correct RPM is not maintained. See Load
vs. Output chart.
Although individual units and models vary slightly, the
normal voltage and frequency of the engine-generator
described in this manual are approximately as follows,
under varying loads:
LOAD vs. OUTPUT
Generator
Load
Speed
(RPM)
Frequency
(Hz)
Voltage
None 3690 61.5 125V
Half 3600 60.0 120V
Full 3510 58.5 115V
The speed of the engine was carefully adjusted at the
factory so that the generator produces the proper voltage
and frequency. For normal usage, the speed setting should
not be charged. If the generator is being run continuously
on a very light load, it is often advisable to lower the
operating speed slightly.
Reference “D” in the following image is the speed
adjustment for this engine.
CAUTION: EQUIPMENT DAMAGE
SPEED ADJUSTMENTS SHOULD ONLY BE MADE BY
A QUALIFIED SERVICE TECH. Whenever making any
speed adjustments, check the unit with a voltmeter and a
frequency meter or a tachometer and be sure the voltage
and speed are correct.
Lower voltage may damage both the generator and any
load connected to it. Running the engine at excessively
high speeds results in high voltage, which may significantly
shorten the life of appliances being used.
9
3110-00 60706-239
LOAD VS. OUTPUT
Generator
Load
Speed
(RPM)
Frequency
(Hz)
Voltage
None 3690 61.5 125V
Half 3600 60.0 120V
Full 3510 58.5 115V
The speed of the engine was carefully adjusted at the
factory so that the generator produces the proper volt-
age and frequency. For normal usage, the speed set-
ting should not be changed. If the generator is being
run continuously on a very light load, it is often advis-
able to lower the operating speed slightly. Reference
“D” below is the speed adjustment for this engine.
CAUTION: EQUIPMENT DAMAGE
SPEED ADJUSTMENTS SHOULD ONLY BE
MADE BY A QUALIFIED SERVICE TECH.
Whenever making any speed adjustments, check
the unit with a voltmeter and a frequency meter or
tachometer and be sure the voltage and speed are
correct.
Lower voltage may damage both the generator and
any load connected to it. Running the engine at
excessively high speeds results in high voltage, which
may significantly shorten the life of appliances being
used.
Output voltage should be checked periodically to
ensure continued proper operation of the generating
plant and appliances. It should be check at the recep-
tacles using a portable meter.
CONNECTING THE LOADS
APPLYING THE LOADS
Allow the engine to warm up for two or three minutes
before applying any load. This will allow the engine to
reach normal operating temperature and oil to circu-
late throughout the engine. A short warm-up time will
permit the engine to work more efficiently when the
load is applied and will reduce the wear in the engine,
extending its life.
Receptacles have been provided to allow loads to
be connected to the generator. The loads should be
added one at a time. If a large motor is being started;
or multiple motors are being started, they should be
started individually and the largest should be started
first.
CAUTION: EQUIPMENT OVERLOAD
Keep the generator load within the generator and
receptacle nameplate rating. Overloading may cause
damage to the generator and/or the loads .
Most electric tools and appliances will have the volt-
age and amperage requirements on their individual
nameplates. When in doubt, consult the manufacturer
or a local electrician. The nameplate amperage rating
for electric motors can be misleading. See “Starting
Electric Motors” in Unit Capabilities (page 4).
These engine-generator sets are inherently self regu-
lating based on engine speed. The engine governor
will automatically adjust itself to the load. No harm
to the generator will result if it is operated with no
load connected. Proper utilization of the receptacles
located on the control panel is necessary to prevent
damage to either the receptacles or the generator.
The generator is a limited source of electrical power,
therefore, pay special attention to the receptacle
and generator ratings. The nameplate rating can be
obtained through a single receptacle as long as the
receptacle amperage rating is not exceeded.
D

9OPM-138/B
CONNECTING THE LOADS
The engine-generator covered in this manual was designed
for portable use. Do NOT operate indoors. The unit should
be stored in a warm, dry location. Move the unit outdoors
to a flat, dry location for use.
WARNING: PERSONAL DANGER:
Operating any engine driven generator without proper air
flow can result in personal injury or death. DO NOT operate
this unit inside a home or garage, near vents or windows,
or anywhere carbon monoxide gas could accumulate.
APPLYING THE LOADS
Allow the engine to warm up for two or three minutes
before applying any load. This will allow the engine to
reach normal operating temperature and oil to circulate
throughout the engine. A short warm-up time will permit
the engine to work more efficiently when the load is
applied and will reduce the wear in the engine, extending
its life.
Receptacles have been provided to allow loads to be
connected to the generator. The loads should be added
one at a time. If a large motor is being started: or multiple
motors are being started, they should be started individually
and the largest should be started first.
CAUTION: EQUIPMENT OVERLOAD
Keep the generator load within in the generator and
receptacle nameplate rating. Overloading may cause
damage to the generator and/or the loads.
Most electric tools and appliances will have the voltage and
amperage requirements on their individual nameplates.
When in doubt, consult the manufacturer or a local
electrician. The nameplate amperage rating for electric
motors can be misleading. See “Starting Electric Motors” in
the Unit Capabilities.
These engine-generator sets are inherently self regulating
based on engine speed. The engine governor will
automatically adjust itself to the load. No harm to
the generator will result if it is operated with no load
connected. Proper utilization of the receptacles located on
the control panel is necessary to prevent damage to either
the receptacles or the generator. The generator is a limited
source of electrical power, therefore, pay special attention
to the receptacle and generator ratings. The nameplate
rating can be obtained through a single receptacle as long
as the receptacles amperage rating is not exceeded.
Output voltage should be checked periodically to ensure
continued proper operation of the generating plant
and appliances. If the generator is not equipped with a
voltmeter, it can be checked with a portable meter.
GROUNDING
Proper grounding of your generator is application
dependent. Carefully evaluate your planned use of your
generator to understand which grounding you require.
If you are not sure what to do, contact a competent
professional to assist you. The NFPA 70 250:34-35 are good
technical references.
STANDARD PORTABLE GENERATOR
Your WINCO portable generator ships with a bonded
neutral. You can safely use this generator without external
grounding as long as all loads are powered through the
receptacle panel.
VEHICLE-MOUNTED GENERATOR
Your WINCO portable generator ships with a bonded
neutral. When mounted to a vehicle to safely distribute
power it is necessary that the generator frame is bonded
to the vehicle frame. The generator should only supply
equipment that is cord and plug connected through
receptacles mounted on the generator or the vehicle.
PERMANENTLY INSTALLED GENERATORS
This WINCO portable generator ships with a bonded
neutral and overcurrent protection. NFPA 70 refers to this
as a “separately derived system.” When connecting it to a
building a transfer switch specifically designed for GFCI and
bonded neutral generators is required.
WIRING
Plug your tools such as drills, saws, blowers, sump pump,
and other items to be powered directly into the generator
receptacles. Before plugging in all the tools and cord
sets, recheck the rating of the generator set. Be sure it
can handle the intended load and is compatible with the
voltage, phase, and current ratings. ‘Hard wiring’ this unit
directly into a temporary construction site electrical system is
NOT A SIMPLE DO-IT-YOURSELF JOB. For your safety, all
wiring must be done by a qualified electrician and conform
to the National Electric Code and comply with all state and
local codes and regulations. Check with local authorities
before proceeding.
WARNING: PERSONAL DANGER
A fully isolated, double pole double throw manual transfer
switch must be installed any time a generator is being
connected to an existing distribution system.
1. These engine-generator sets are designed for portable
heavy duty commercial use. Receptacles are provided
on the control panel to permit 120 and 240 Volt
portable appliances and tools to be plugged directly into

10
OPM-138/B
them. Please note that the 3-wire 240 Volt receptacle(s)
on these units are designed to power only 240 Volt
tools. There are two hot leads and a ground wire, but
no neutral connection, in the 3-wire 240Volt receptacle.
A 4-wire receptacle (two hot, one ground, and one
neutral) has been provided on the control panel for
use in temporary power applications requiring 120/240
Volt power. Consult a licensed electrician for wiring the
TemPower plug and connecting it as temporary service.
To connect these units directly to an un-powered,
isolated construction site TemPower panel, have your
electrician connect to the control panel using a 120/240
Volt, 4-wire twist-lock plug (14-60P).
NOTE: Never attempt to use the 240 Volt 3-wire
receptacle to wire into a building. This is a GFCI circuit
and is designed for 240 Volt output only. It has no neutral
connection. If you attempt to draw 120 Volt from this
receptacle, the GFCI breaker will trip.
2. If the generator set is connected to an existing
distribution system, a fully isolated manual transfer
switch must be installed. The transfer switch prevents
damage to the generator and the other circuit
components if main line power is restored while the
generator is connected. Installing a transfer switch also
permits the use of normal fusing.
3.Many homes and construction sites are wired for at
least 60 to 100 Amp entrance service, much greater
than the capacity of this portable generator. When
installing the generator at these sites, a secondary
emergency distribution panel may have to be installed.
The emergency distribution panel must be installed by
a licensed electrician according to all applicable codes.
The electrician will move the critical circuits to be
powered during the outage to the emergency panel.
Keep in mind only a limited amount of amperage is
available from the generator set. Some circuit breakers
may still have to be turned off to prevent an overload on
the generator during the initial start up. See the
nameplate on your generator for the amperage
capabilities of your unit.
CAUTION: EQUIPMENT DAMAGE
Failure to properly limit and balance the load applied to
the generator will cause the generator to produce low
voltage and may damage the engine generator set. It may
also cause severe damage to the loads connected to the
generator at that time. Improper loading of the generator
set constitutes abuse and will not be covered by warranty.
YOURGEN
The WINCO YourGen meter allows you to see useful
information about your generator from the front panel
by displaying RPMs, Voltage, frequency, load, hours, and
maintenance reminders. It also has the ability to display
warnings if any parameter gets outside of normal operation
range.
Cycle Button ( ) -
During normal operation, the display will toggle through
on fixed delay. If you want to see any specific item, you
can press the cycle button to move it to that setting. Once
the display is selected, the delay before it starts toggling is
approximately 5 seconds. This button is also used to reset
maintenance reminders.
RPM -
The meter will display the RPMs of the engine. This number
is calculated based upon frequency and is not directly
measured from the engine. The engine-generator must be
run at the correct speed in order to produce the proper
electrical voltage and frequency.
CAUTION: EQUIPMENT DAMAGE
The output voltage should be checked to ensure the
generator is working properly prior to connecting a load to
the generator. Failure to do so could result in damage to
equipment plugged into the unit and possible injury to the
individual.
Operating Speed
All engines have a tendency to slow down when a load
is applied. When the electrical load is connected to the
generator, the engine is more heavily loaded, and as a
result, the speed drops slightly. This slight decrease in
speed, together with the voltage drop within the generator
itself, results in a slightly lower voltage when the generator
is loaded to its full capacity than when running no load.
The slight variation in speed also affects the frequency
of the output current. This frequency variation has no
appreciable effect in the operation of motors, lights, and
most appliances. However, electronic equipment and clocks
will be affected if correct RPM is not maintained. See Load
vs. Output chart.

11 OPM-138/B
Although individual units and models vary slightly, the
normal voltage and frequency of the engine-generator
described in this manual are approximately as follows,
under varying loads:
LOAD vs. OUTPUT
Generator
Load
Speed
(RPM)
Frequency
(Hz)
Voltage
120V
Recpt
240V
Recpt
None 3690 61.5 120V 240V
Half 3600 60.0 120V 240V
Full 3510 58.5 120V 240V
The speed of the engine was carefully adjusted at the
factory so that the generator produces the proper voltage
and frequency. For normal usage, the speed setting should
not be changed. If the generator is being run continuously
on a very light load, it is often advisable to lower the
operating speed slightly.
The engine will govern itself at full speed. Intentionally
overriding the governor and operating the generator at
low voltage may damage both the generator and any load
connected to it. Running the engine at excessively high
speeds results in high voltage, which may significantly
shorten the life of light bulbs and appliances being used, as
well as possibly damaging the engine.
CAUTION: EQUIPMENT DAMAGE
SPEED ADJUSTMENTS SHOULD ONLY BE MADE BY A
QUALIFIED SERVICE TECH. Whenever making any speed
adjustments, check the YourGen meter and be sure the
voltage and speed are correct.
Output voltage should be checked periodically to ensure
continued proper operation of the generating plant and
appliances.
Hz -
This is the measured frequency of the generator set. See
the table in the RPM section above for an explanation of
voltage and frequency ranges under load.
V1 -
Output voltage of Line 1 (L1 on panel) to neutral. See the
Load vs. Output table for an explanation of voltage and
frequency ranges under load.
V2 -
Output voltage of Line 2 (L2 on panel) to neutral. See the
Load vs. Output table for an explanation of voltage and
frequency ranges under load.
V1-V2 -
Output voltage of Line 1 (L1) and Line 2 (L2). See the
Load vs. Output table for an explanation of voltage and
frequency ranges under load.
Hours -
This displays the total running hours of the generator set.
When the generator is turned off, the hours will remain
displayed. The display is run on a CR2032, ten-year battery.
Once the unit is running, the battery connected to the unit
will then supply the power to the YourGen meter.
Load Bars -
These bars indicate how much load is being used on Line 1
(L1) and Line 2 (L2).
= 1-25% = 25-50% = 50-75% = 75-100%
It is good practice to monitor the YourGen Meter when
applying load.
This will ensure the generator is balanced.
Balanced Unbalanced
120 Volt and 120/240 Volt receptacles are provided for
connection to various loads.
The diagram below represents this 15,000 watt (rated
output) generator. A & B represent the 120 volt output
legs of this generator. Up to 7,500 watts at 120 volts
(62.5 Amps) can be drawn from the receptacles attached
to either A or B output legs. This generator is capable of
producing 62.5 Amps of 240 volt current at C. Check the
appliance or tool nameplates for the current and voltage
to insure compatibility. Remember that power taken from
C reduces the power available at equally both A and B and
vice versa.
Change Oil Warning -
After the first 50 hours, the engine oil should be changed.
The YourGen meter will light up the oil icon ( ) and the
word ‘change’ will flash. Once the oil has been changed,
press and hold the cycle button for approximately 5
seconds until the warning has been removed from the
display to reset the warning. The meter will then remind
you of oil changes on the appropriate schedule for your
generator. It is important to remember that the engine
manufacturer recommends changing the oil on a calendar
schedule even if the total number of operational hours have
not been reached. Certain operating environments may
also require more frequent oil changes.

12
OPM-138/B
ENGINE CARE
MAINTENANCE SCHEDULE
If major engine service or repair is required, contact an
authorized
engine service center. The manufacturer of these engines
has
established an excellent world-wide engine service
organization.
Engine service is very likely available from a nearby
authorized dealer
or distributor.
CHECKING THE OIL LEVEL
The oil level must always be checked before the engine is
started. Refer to page 6 of this manual for instructions on
checking the oil level. Take care to remove any dirt or debris
from around the oil plug before removing. Be sure the oil
level is maintained.
CHANGING THE OIL
Refer to the Maintenance Schedule Chart for required oil
change intervals.
A. Start the engine and warm it up, stop the engine and
remove the spark plug wire to prevent it from
accidentally being started.
B. This engine has an oil drain valve for your convenience.
Attach a neoprene hose and drain the oil into an
approved container.
11
3110-00 60706-239
ENGINE CARE
If major engine service or repair is required, contact
an authorized engine service center. The manufac-
turer of these engines has established an excellent
world-wide engine service organization. Engine ser-
vice is very likely available from a nearby authorized
dealer or distributor. Check the yellow pages of your
local telephone directory under “Engines-Gasoline”
for the closest engine repair center or ask the dealer
from whom you purchased the power plant.
1. Change the oil after the first 5 hours of operation
and yearly or 100 hours thereafter under normal op-
erating conditions. Change engine oil every 50 hours
of operation if the engine is operated under heavy
load, or in high ambient temperatures.
a. Start the engine and warm it up, stop the engine
and remove the spark plug wire to prevent it
from accidently being started.
b. Remove oil drain plug at base of the engine
(Ref “B”) and drain the oil into an approved
container.
c. Remove the oil filter (Ref “C”) and dispose of it
properly.
d. Before you install the new oil filter, lightly lubri-
cate the oil filter gasket with fresh clean oil.
e. Install the oil filter by hand until the gasket
contacts the oil filter adapter, then tighten the oil
filter 1/2 to 3/4 turns.
f. Replace oil drain plug.
g. Remove oil filler plug and refill with new oil.
Refer to the table on page 5 for the proper
grade of oil based on your operating
temperature.
NOTE: This engine requires 78 to 80 ounces of oil
if it is completely drained. Use caution when refilling
the engine as some residual oil may have remained
in the engine. Always use the dipstick when filling
the engine with oil to prevent overfilling.
h. Replace filler plug.
I. Start the engine and warm it up.
J. After warming up the engine, recheck the oil
level and refill as necessary to bring it to the
proper level. See page 5 for proper oil level.
2. Checking the Oil Level: The oil level must al-
ways be checked before the engine is started. Take
care to remove any dirt or debris from around the
oil fill plug before removing. Be sure the oil level is
maintained. Fill to the “FULL” mark on the dipstick.
3. Dual Element Air Filter: Clean and/or replace
foam pre-cleaner and air filter annually or every 100
hours. Service more often under dusty conditions.
WARNING: EQUIPMENT DAMAGE
Never start or run the engine with the air filter re-
moved
a. Loosen snaps (Ref “A”) and remove cover.
Ref “B”
Maintenance Chart
First 5 Hours
xChange oil
Every 8 Hours or Daily
xCheck engine oil level
xClean area around muffler and controls
Every 100 Hours or Annually
xClean or change air filter *
xClean pre-cleaner (if equipped) *
xChange engine oil and filter
xReplace spark plug
xCheck muffler and spark arrester
Every 250 Hours or Annually
xCheck valve clearance. Adjust if necessary.
Every 400 Hours or Annually
xChange air filter
xReplace fuel filter
xClean air cooling system *
xClean oil cooler fins *
*In dusty conditions or when airborne debris is present, clean more often.
A
B
F
E
D
G
C
B
Alarms -
The display will start blinking and toggle to the first
parameter that is out of specification. The panel will remain
flashing until the fault condition returns to within the
acceptable range, see following table.
Acceptable Range
Frequency 57-63 Hz
Voltage 110VAC-130VAC
VAC1-VAC2 220VAC-260VAC
Battery -
When the unit is off, the YourGen meter will display the
hours continuously using a coin cell back-up battery inside
the meter. Once the unit is running, the meter will get
power from the main unit battery.
Voltage 3.0V DC
Battery Type CR2032
Lifetime 10 Years
The battery has a 10 year lifetime, in the event you need to
change the battery, follow these instructions:
The battery is located in the control box near potentially live
AC terminals. To prevent electrocution while changing the
battery disable the unit by disconnecting the main battery,
spark plug wire and then open the receptacle panel. Locate
the backside of the YourGen meter. Gently pry the back
plate off using the slot located on top.
Once open, the battery will be located at the top. Using a
needle nose plier, carefully pull out the battery.
Replace the battery having the POSITIVE (+) side down.
Ensure the battery is secured between the battery
connections.
Replace the back plate of the meter and close the receptacle
panel using the screws to secure it. Reconnect the unit’s
main battery.
Battery
Install Battery Between These Two Points

13 OPM-138/B
B. Remove the nut (‘D’) and the retainer (‘E’).
C. Remove the air filter (‘F’).
D. Remove the pre-cleaner (‘G’) from the air filter.
E. To loosen debris, gently tap the air filter on a hard
surface. If the air filter is excessively dirty replace with a
new filter.
NOTE: Do NOT use pressurized air or solvents to clean the
filter. Pressurized air can damage the filter and solvents will
disolve the filter.
F. Wash the pre-cleaner in liquid detergent and water.
Then allow it to thoroughly air dry. DO NOT oil the pre-
cleaner.
G. Install the pre-cleaner to the air filter..
H. Install the air filter and secure with retainer and nut.
I. Install and secure the cover.
SPARK PLUG
Replace annually or every 300 hours of operation. Always
replace with the same spark plug that came in the engine
and check gap before installing. Spark plug gap is 0.030”.
Poor spark will also occur if spark plug wire does not fit
firmly on spark plug. If this happens, reform the terminal to
fit firmly on spark plug tip.
CARBON CANISTER
Designed to collect, store, and dispose of fuel vapors
created in the fuel tank/fuel system. The canister should last
the life of the unit as long as it stays dry.
C. Remove the oil filter and dispose of it properly.
D. Before you install the new oil filter, clean the filter
mounting base and coat the seal of the new oil filter
will clean engine oil.
E. Install the oil filter by hand until the gasket contacts the
oil filter adapter, then tighten the oil filter 1/2 to 3/4
turns.
F. Replace oil drain bolt making sure the sealing washer is
in place.
G. Remove the oil filter plug and refill with new oil. Make
sure to use the proper grade oil based on your
operating temperature.
NOTE: This engine requires 78 to 80 ounces (2.4 to 2.5
quarts) of oil if it is completely drained. Use caution when
refilling the engine as some residual oil may have remained
in the engine. Always use the dipstick when filling the
engine with oil to prevent overfilling.
H. Replace filter plug.
I. Start the engine and warm it up.
J . After warming up the engine, recheck the oil level and
refill as necessary to bring it to the proper level.
DUAL ELEMENT AIR FILTER
Clean and/or replace the foam pre-cleaner and the air filter
annually or every 100 hours. Service more often under
dusty conditions.
WARNING: EQUIPMENT DAMAGE
Never start or run the engine with the air filter removed.
A. Loosen snaps (‘A’) and remove cover (‘B’).
Neoprene Hose, 1/2” I.D.
Cut to length
11
3110-00 60706-239
ENGINE CARE
If major engine service or repair is required, contact
an authorized engine service center. The manufac-
turer of these engines has established an excellent
world-wide engine service organization. Engine ser-
vice is very likely available from a nearby authorized
dealer or distributor. Check the yellow pages of your
local telephone directory under “Engines-Gasoline”
for the closest engine repair center or ask the dealer
from whom you purchased the power plant.
1. Change the oil after the first 5 hours of operation
and yearly or 100 hours thereafter under normal op-
erating conditions. Change engine oil every 50 hours
of operation if the engine is operated under heavy
load, or in high ambient temperatures.
a. Start the engine and warm it up, stop the engine
and remove the spark plug wire to prevent it
from accidently being started.
b. Remove oil drain plug at base of the engine
(Ref “B”) and drain the oil into an approved
container.
c. Remove the oil filter (Ref “C”) and dispose of it
properly.
d. Before you install the new oil filter, lightly lubri-
cate the oil filter gasket with fresh clean oil.
e. Install the oil filter by hand until the gasket
contacts the oil filter adapter, then tighten the oil
filter 1/2 to 3/4 turns.
f. Replace oil drain plug.
g. Remove oil filler plug and refill with new oil.
Refer to the table on page 5 for the proper
grade of oil based on your operating
temperature.
NOTE: This engine requires 78 to 80 ounces of oil
if it is completely drained. Use caution when refilling
the engine as some residual oil may have remained
in the engine. Always use the dipstick when filling
the engine with oil to prevent overfilling.
h. Replace filler plug.
I. Start the engine and warm it up.
J. After warming up the engine, recheck the oil
level and refill as necessary to bring it to the
proper level. See page 5 for proper oil level.
2. Checking the Oil Level: The oil level must al-
ways be checked before the engine is started. Take
care to remove any dirt or debris from around the
oil fill plug before removing. Be sure the oil level is
maintained. Fill to the “FULL” mark on the dipstick.
3. Dual Element Air Filter: Clean and/or replace
foam pre-cleaner and air filter annually or every 100
hours. Service more often under dusty conditions.
WARNING: EQUIPMENT DAMAGE
Never start or run the engine with the air filter re-
moved
a. Loosen snaps (Ref “A”) and remove cover.
Ref “B”
Maintenance Chart
First 5 Hours
xChange oil
Every 8 Hours or Daily
xCheck engine oil level
xClean area around muffler and controls
Every 100 Hours or Annually
xClean or change air filter *
xClean pre-cleaner (if equipped) *
xChange engine oil and filter
xReplace spark plug
xCheck muffler and spark arrester
Every 250 Hours or Annually
xCheck valve clearance. Adjust if necessary.
Every 400 Hours or Annually
xChange air filter
xReplace fuel filter
xClean air cooling system *
xClean oil cooler fins *
*In dusty conditions or when airborne debris is present, clean more often.
A
B
F
E
D
G
C
B

14
OPM-138/B
TROUBLESHOOTING
Problem Possible Causes
Won’t start Low oil level
Fouled spark plug
Out of fuel
Start switch in OFF position
Fuel Valve turned off
Plugged fuel filter
Blown fuse in key switch
Voltage too low Engine speed is too low
Generator overloaded
Defective stator
Defective rotor (field)
Defective capacitor
Circuit breaker trips Defective load
Defective receptacle
Excessive load
Voltage too high Engine speed is too high
Generator overheating Overloaded
Insufficient ventilation
No output voltage Short in load (disconnect)
Tripped or defective circuit breaker
Broken or loose wire
Defective receptacle
No residual magnetism (in
generator)
Defective stator
Defective rotor (field)
Shorted capacitor
Shorted diodes on rotor
GFCI receptacle tripped
GENERATOR CARE
Proper care and maintenance of the generator is necessary
to ensure a long trouble free life.
EXERCISING THE GENERATOR
The generator should be operated every three to four
weeks. It should be operated for a period of time sufficient
to warm the unit up and to dry out any moisture that has
accumulated in the windings. If left, this moisture can cause
corrosion in the winding. Frequent operation of the engine-
generator set will also ensure that the set is operating
properly should it be needed in an emergency.
GENERATOR MAINTENANCE
Any major generator service, including the installation
or replacement of parts, should be performed only by a
qualified electrical service technician. USE ONLY FACTORY
APPROVED REPAIR PARTS.
A. Bearing - The bearing used in these generators is a
heavy duty, double sealed ball bearing. They require
no maintenance or lubrication.
B. Receptacles - Quality receptacles have been utilized. If a
receptacle should become cracked or otherwise
damaged, replace it. Using damaged or cracked
receptacles can be both dangerous to the operator
and destructive to the equipment.
CLEANING
Remove dirt and debris with a cloth or brush. DO NOT
use high pressure spray to clean either the engine or the
generator. The high pressure spray could contaminate the
fuel system and the generator components.
1. Keep the air inlet screen on both the engine and
generator free of any dirt or debris to ensure proper
cooling. At least yearly, remove the blower housing on
the engine and clean the chaff and dirt out of the engine
cooling fins and fly wheel. Clean more often if necessary.
Failure to keep these areas clean may cause overheating
and permanent damage to the unit.
2. Periodically clean muffler area to remove all grass, dirt,
and combustible debris to prevent a fire.
3. On engine mufflers equipped with spark arresters, the
spark arrester must be removed every 50 hours for
cleaning and inspection. Replace if damaged.

15 OPM-138/B
G1
G3
N
N
GND
GND
GND
GND
GND
GND
N
N
NNN
G3
G3
G3
G3
G3
G3
G1
G1
G1
G1
G1 G1
G1
G1
CONTROL PANEL WIRING DIAGRAM

16
OPM-138/B
WINCO, Incorporated warrants to the original purchaser for 24 months, that goods manufactured
or supplied by it will be free from defects in workmanship and material, provided such goods are
installed, operated and maintained in accordance with WINCO written instructions.
WINCO’s sole liability, and Purchaser’s sole remedy for a failure under this warranty, shall be limited
to the repair of the product. At WINCO’s option, material found to be defective in material or
workmanship under normal use and service will be repaired or replaced. For warranty service, return
the product within 24 months from the date of purchase, transportation charges prepaid, to your
nearest WINCO Authorized Service Center or to WINCO, Inc. at Le Center Minnesota.
THERE IS NO OTHER EXPRESS WARRANTY.
To the extent permitted by law, any and all warranties, including those of merchantability and fitness
for a particular purpose, are limited to 24 months from date of purchase. In no event is WINCO liable
for incidental or consequential damages.
Note: Some states do not allow limitation on the duration of implied warranty and some states do not
allow the exclusion or limitation of incidental or consequential damages, so the above limitations may
not apply in every instance. This warranty gives you specific legal rights which may vary from state to
state.
WINCO reserves the right to change or improve its products without incurring any obligations to
make such changes or improvement on products purchased previously.
EXCLUSIONS:
WINCO does not warrant Engines. Engines are covered exclusively by the warranties of their
respective manufacturers, see enclosed warranties.
WINCO does not warrant Component Parts that are warranted by their respective manufacturers.
WINCO does not warrant modifications or alterations which were not made by WINCO, Inc.
WINCO does not warrant products which have been subjected to misuse and/or negligence or have
been involved in an accident.
This warranty does not include travel time, mileage, or labor for removal or re-installation of WINCO
product from its application.
ENGINE GENERATOR SET
24 MONTH
LIMITED WARRANTY
WINCO INC. • 225 S. CORDOVA AVE • LE CENTER, MN 56057 • 507-357-6821
OPM-138/B