Koshin America Corporation GEH-3100DX User manual

Koshin America Corporation
1218 Remington Rd
Schaumburg, IL 60173
Customer Service: 1-800-634-4092
e-mail: [email protected] 1 12/11 0069297
GENERATOR MODEL
GEH-3100DX
MODEL & SERIAL NUMBER
Enter the Model and Serial numbers of your generator in the spaces provided below. Retain these numbers for future
reference. The Model and Serial numbers are located on the generator data plate on the alternator case or generator
frame, along with other important information. This manual contains important safety information. This manual must be
available to any personnel who operate or maintain this machine. Do not destroy.
Model Number
Serial Number
GENERATOR USER
MANUAL
Koshin Portable Power Systems

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0069297 2
CONTACT INFORMATION
For Parts, Service or your nearest distributor call:
Koshin America
Customer Service
1-800-634-4092
Website:
www.koshinamerica.com

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0069297 3
Table of Contents
ENGLISH INSTRUCTIONS.................................................................................................................5
SAFETY............................................................................................................................................................................... 5
GENERAL INFORMATION........................................................................................................................................... 5
SAFETY RULES ............................................................................................................................................................. 5
Limited warranty.............................................................................................................................................................. 7
WARRANTY REGISTRATION......................................................................................................................................... 8
OPERATION ..................................................................................................................................................................... 11
GENERAL INFORMATION......................................................................................................................................... 11
BEFORE START-UP..................................................................................................................................................... 11
OPERATION ................................................................................................................................................................. 11
GENERATOR APPLICATION..................................................................................................................................... 12
LOADING YOUR GENERATOR SET ........................................................................................................................ 13
ENGINE LIMITATIONS ON GENERATOR PERFORMANCE ................................................................................ 13
GENERATOR CLEANING........................................................................................................................................... 13
GENERAL STORAGE GUIDELINES ......................................................................................................................... 13
RECEPTACLE DETAILS............................................................................................................................................. 14
GENERAL MAINTENANCE........................................................................................................................................... 14
Engine Specifications and Capacities............................................................................................................................. 14
Oil Selection................................................................................................................................................................... 15
Engine Maintenance Schedule........................................................................................................................................ 15
DAILY INSPECTION ................................................................................................................................................... 16
FAULT FINDING GUIDE ............................................................................................................................................ 16
PARTS ORDERING.......................................................................................................................................................... 17
GENERATOR PARTS LISTS.............................................................................................................19
GEH-3100DX GENERATOR PARTS LIST..................................................................................................................... 19
WIRING SCHEMATICS.....................................................................................................................21
FRENCH INSTRUCTIONS.................................................................................................................22
SÉCURITÉ......................................................................................................................................................................... 22
INFORMATION GENERALE...................................................................................................................................... 22
règles de sécurité ............................................................................................................................................................ 22
ENREGISTREMENT DE LA GARANTIE....................................................................................................................... 24
GARANTIE LIMITÉE....................................................................................................................................................... 27
UTILISATION................................................................................................................................................................... 28
INFORMATION GÉNÉRALE...................................................................................................................................... 28
AVANT LE DÉMARRAGE.......................................................................................................................................... 28
UTILISATION............................................................................................................................................................... 28
USAGE DE LA GÉNÉRATRICE.................................................................................................................................. 29
charger votre génératrice................................................................................................................................................ 30
Limite du moteur sur la performance de la génératrice.................................................................................................. 30
Nettoyage de la génératrice ............................................................................................................................................ 30
Règles générales d’entretien........................................................................................................................................... 30
Détails des réceptacles (prise femelle)............................................................................................................................ 31
ENTRETIEN GÉNÉRAL .................................................................................................................................................. 31
spécifications du moteur et capacités ............................................................................................................................. 31
SÉlection d’huile............................................................................................................................................................ 32
horaire d’entretien du moteur......................................................................................................................................... 32
INSPECTION quotidienne............................................................................................................................................. 33

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guide des failles.............................................................................................................................................................. 33
COMMANDE DES PIÈCES.............................................................................................................................................. 34
SPANISH INSTRUCTIONS................................................................................................................36
SEGURIDAD..................................................................................................................................................................... 36
informacion GENERAL................................................................................................................................................. 36
reglas de seguridad......................................................................................................................................................... 36
REGISTRACION DE GARANTIA................................................................................................................................... 38
GARANTIA LIMITADA............................................................................................................................................... 41
FUNCIONAMIENTO........................................................................................................................................................ 41
INFORMACIÓN GENERAL ........................................................................................................................................ 42
comenzando.................................................................................................................................................................... 42
funcionamiento............................................................................................................................................................... 42
APLICACIÓN del generador......................................................................................................................................... 43
Carga DE su generador................................................................................................................................................... 44
limitaciones del motor y rendimiento del generador ...................................................................................................... 44
limpieza del generador.................................................................................................................................................... 44
detalles de receptaculos.................................................................................................................................................. 44
MANTENIMIENTO GENERAL....................................................................................................................................... 45
especificaciones y capacidades del motor ...................................................................................................................... 45
Selection de aceite.......................................................................................................................................................... 45
programa de mantenimiento de motor............................................................................................................................ 46
inspeccion diaria............................................................................................................................................................. 46
Guia para encontrar fallas............................................................................................................................................... 46
ORDENANDO PIEZAS ................................................................................................................................................ 47
All information provided in this manual is believed to be correct at the time of printing. The manufacturer reserves the right to correct any
errors and omissions.

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ENGLISH INSTRUCTIONS
SAFETY
GENERAL INFORMATION
This manual is provided so that your generator may
be properly, safely and effectively applied and
operated. Please read and understand all aspects
of this manual before operating your generator set.
Please also read and understand the
documentation supplied with this generator
regarding the engine and alternator. Keep this
documentation in a safe and accessible place so
that reference can be made as needed. All
operators, users and subsequent owners of this
generator must read and understand all aspects of
this documentation before operating this product.
THIS SYMBOL IS USED THROUGHOUT YOUR
OWNER’S MANUAL TO BRING ATTENTION TO
IMPORTANT SAFETY INSTRUCTIONS. THE WORDS
DANGER, WARNING, AND CAUTION ACCOMPANY THIS
SYMBOL AND REFLECT THE POTENTIAL SEVERITY OF
INJURY OR DAMAGE. FAILURE TO FOLLOW SAFETY
INSTRUCTIONS COULD ENDANGER YOU OR OTHERS AND
RESULT IN PERSONAL INJURY OR DEATH. READ AND
UNDERSTAND ALL SAFETY INSTRUCTIONS BEFORE
OPERATION.
SAFETY RULES
SPARK ARRESTING MUFFLER
Certain States and Jurisdictions require that engine
driven equipment be fitted with spark arresting mufflers.
Depending on the generator model, spark-arresting
mufflers may or may not be fitted. If spark-arresting
mufflers are required for your location and the generator
muffler is not spark arresting, contact your local dealer
for instructions for a retrofit.
EXHAUST EMISSION CONTROL SYSTEM
The exhaust emission control system for this generator
complies with the standards set forth by the California
Air Resources Board (CARB) and the Environmental
Protection Agency (EPA). The respective engine
manufacturers administer warranties for the exhaust
emission system. Refer to the engine documentation for
warranty information.
WARNING
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
ELECTROCUTION
DANGER:THIS GENERATOR SET PRODUCES
ELECTRICAL CURRENT. THEREFORE, SAFETY
GUIDELINES MUST BE FOLLOWED. IMPROPER
USE OF THIS GENERATOR CAN RESULT IN
ELECTROCUTION, INJURY OR DEATH. DO NOT OPERATE,
SERVICE OR REPAIR THIS GENERATOR UNLESS FULLY
QUALIFIED TO DO SO.
DANGER: THIS GENERATOR SET IS DESIGNED
TO BE OPERATED IN DRY CONDITIONS AND FOR
OUTDOOR AREAS ONLY. NEVER OPERATE THIS
GENERATOR INDOORS. NEVER OPERATE THIS
GENERATOR IN RAIN, SNOW, SLEET OR GENERALLY WET
CONDITIONS. DAMAGE TO THE GENERATOR, BODILY
INJURY, OR DEATH COULD RESULT FROM
ELECTROCUTION.
DANGER: IF THIS GENERATOR IS CONNECTED TO
A BUILDING, HOME, BUSINESS, OR ANY OTHER
ELECTRICAL CIRCUIT NORMALLY FED BY UTILITY
POWER, STEPS MUST BE TAKEN TO INSURE THE
GENERATOR OUTPUT AND THE UTILITY POWER ARE
POSITIVELY ISOLATED. THIS IS TYPICALLY
ACCOMPLISHED THROUGH THE USE OF A PROPERLY
INSTALLED TRANSFER SWITCH. FAILURE TO ISOLATE THE
UTILITY AND GENERATOR ELECTRICAL SYSTEMS WILL
RESULT IN GENERATOR DAMAGE AND COULD RESULT IN
INJURY OR DEATH TO UTILITY WORKERS DUE TO THE
BACKFEED OF ELECTRICITY.
DANGER: DO NOT MODIFY OR MISAPPLY YOUR
GENERATOR SET. OPERATION OF THE
GENERATOR OTHER THAN INTENDED COULD
RESULT IN GENERATOR SET DAMAGE, BODILY INJURY OR
EVEN DEATH FROM ELECTROCUTION.
DANGER: NEVER TOUCH A RECEPTACLE OR
BARE WIRE. ELECTROCUTION OR SHOCK
COULD RESULT.
FIRE
WARNING: ALWAYS INSURE THAT AT LEAST 6
FEET OF CLEARANCE ON ALL SIDES OF THE
GENERATOR ARE MAINTAINED DURING
OPERATION. FAILURE TO MAINTAIN PROPER CLEARANCE
COULD DAMAGE YOUR GENERATOR AND POTENTIALLY
LEAD TO FIRES.
WARNING: GASOLINE IS HIGHLY FLAMMABLE
AND ITS VAPORS ARE EXPLOSIVE. FAILURE TO
PROPERLY HANDLE GASOLINE CAN RESULT IN
EXPLOSION OR FIRE. DO NOT PERMIT SMOKING WITHIN
50FT OF THIS GENERATOR SET.
WARNING: NEVER REFILL A HOT GENERATOR
WITH FUEL. NEVER REFILL THE GENERATOR
WHILE IT IS RUNNING. SPILLAGE ONTO THE
ENGINE OR GENERATOR COULD RESULT IN AN
EXPLOSION OR FIRE. ALWAYS ALLOW THE GENERATOR
SET TO COOL BEFORE REFILLING.
WARNING: DO NOT STORE THIS GENERATOR
SET IN ANY LOCATION WHERE GASOLINE
FUMES COULD POTENTIALLY COME INTO

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CONTACT WITH SPARKS, A PILOT LIGHT OR AN OPEN
FLAME. IMPROPER STORAGE OF THIS GENERATOR
COULD RESULT IN AN EXPLOSION OR FIRE.
EXHAUST GASES
DANGER: DO NOT OPERATE THIS GENERATOR
WITHIN AN ENCLOSED AREA. THE EXHAUST
GASES OF THIS GENERATOR EMIT “DEADLY”
CARBON MONOXIDE. EXPOSURE TO CARBON MONOXIDE
CAN CAUSE CARBON MONOXIDE POISONING,
HEADACHES, NAUSEA, SEVERE SICKNESS OR DEATH.
BURNS AND SCALDS
CAUTION: KEEP HANDS, BODY PARTS, HAIR AND
CLOTHING AWAY FROM THE “HOT” PARTS OF
THE GENERATOR SET DURING AND AFTER
OPERATION. THE EXHAUST SYSTEM, AND THE
GENERATOR IN GENERAL, CAN REMAIN VERY HOT EVEN
AFTER BEING SHUT DOWN.
ENVIRONMENTAL PROTECTION
CAUTION: INSPECT THE EXHAUST SYSTEM
REGULARLY TO ENSURE IT IS FUNCTIONING
PROPERLY. LEAKY EXHAUST SYSTEMS WILL
INCREASE NOISE LEVELS.
CAUTION: DIRECT THE “LOUD” SIDES OF THE
GENERATOR INTO OPEN SPACES AVOIDING
REVERBERATION FROM WALLS OR BUILDINGS
THUS AMPLIFYING THE SOUND.
CAUTION: INSPECT THE SPARK ARRESTOR
PERIODICALLY. SPARK ARRESTORS ARE
REQUIRED IN SOME AREAS AND MINIMIZE THE
RISK OF FIRE FROM SPARKS EMMITTED FROM THE
EXHAUST.
CAUTION: NEVER DRAIN OR DISPOSE OF
ENGINE OIL INTO THE GROUND OR DOMESTIC
WASTE WATER SYSTEMS.
GENERAL SAFETY
Always follow National and Local electrical codes
pertaining to generators. All local and national codes
supersede rules or information provided in this manual.
CAUTION: DO NOT OPERATE THIS GENERATOR
IF THE AMBIENT TEMPERATURE EXCEEDS
104ºF/40ºC.
CAUTION: DO NOT EXCEED THE RATED CAPACITY
OF THE GENERATOR. THE TOTAL ELECTRICAL
LOADS AT EACH OUTLET MUST BE ADDED TO
DETERMINE THE TOTAL ELECTRICAL LOAD. THE TOTAL
LOAD MUST NOT EXCEED THE RATED CAPACITY OF THE
GENERATOR. IF THE DRIVEN APPARATUS DOES NOT LIST
WATTAGE, BUT ONLY AMPERAGE, WATTAGE MAY BE
DETERMINED BY MULTIPLYING AMPERAGE TIMES
VOLTAGE (WATTS = AMPS X VOLTS).
CAUTION: DO NOT TAMPER WITH THE ENGINE-
GOVERNED SPEED. THE GENERATOR OPERATES
AT A NOMINAL SPEED OF 3600 RPM. INCREASES
IN SPEED OVER THE 3600 RPM NOMINAL WILL INCREASE
THE CHANCE OF PERSONAL INJURY DUE TO ROTATIONAL
STRESSES ON THE ROTATING MEMBERS. OPERATION OF
THE GENERATOR AT SPEEDS BELOW THE NOMINAL 3600
RPM COULD CAUSE DAMAGE TO THE GENERATOR OR
DRIVEN APPARATUS DUE TO LOW VOLTAGE OUTPUT.
WARNING: REFER TO LOCAL AND NATIONAL
ELECTRICAL CODES TO DETERMINE
GROUNDING REQUIREMENTS AS THIS CAN
VARY PER APPLICATION. THE GENERATOR IS GROUNDED
INTERNALLY NEUTRAL TO FRAME. WHERE APPLICATIONS
REQUIRE EXTERNAL GROUNDING, A CONNECTION MUST
BE MADE FROM THE GENERATOR TO A SOLID EARTH
GROUND. A CONTINUOUS LENGTH OF SPLICE-FREE
COPPER CABLE, NO SMALLER THAN 6 AWG, SHALL BE
USED FOR THE CONDUCTOR.
•When moving or transporting this generator, take
proper precautions to avoid fuel spillage. Further,
always use common sense when lifting this
generator. An adequate number of people and
proper lifting methods must be used.
•Do not cover the generator while it is running or
immediately after shutdown. Always allow time to
cool down before covering.
•Do not operate this generator unless it is in good
mechanical and electrical condition.
•Always keep hands, body parts, hair and clothing
well away from the rotating parts of the generator.
•Do not start this generator with connected devices
turned “ON”. Always make sure that connected
devices are disconnected from the generator or
turned “OFF” before starting the generator.
•Generators operating on job or construction sites
may be required to have GFCI (Ground Fault Circuit
Interrupters) receptacles.
•Use only grounded extension cords in good
condition and make sure that the wire size within the
extension cords is of sufficient size to safely carry
the surge output of the generator.
•Never handle extension cords or electrical circuits if
standing in water or if standing in a damp area.
BATTERY SAFETY
WARNING: STORAGE BATTERIES PRODUCE AND RELEASE EXPLOSIVE HYDROGEN GAS WHEN CHARGING. THE
SLIGHTEST SPARK, FLAME OR BURNING ASH CAN IGNITE THESE GASES CAUSING A SERIOUS EXPLOSION THAT
COULD RESULT IN BLINDNESS OR OTHER SERIOUS INJURIES. WEAR EYE PROTECTION, RUBBER APRON AND
RUBBER GLOVES WHEN WORKING AROUND A BATTERY OR PERFORMING BATTERY SERVICE. BATTERY FLUID IS AN
EXTREMELY CAUSTIC SULFURIC ACID, WHICH CAN CAUSE SEVERE BURNS. ALWAYS DISCONNECT THE NEGATIVE (-)
BATTERY CABLE FROM THE BATTERY BEFORE PERFORMING BATTERY SERVICE OR BEFORE PERFORMING ANY ELECTRICAL
SERVICE ON THE GENERATOR OR ENGINE.

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LIMITED WARRANTY FOR KOSHIN PORTABLE POWER SYSTEMS PRODUCTS
This warranty applies to generators, pressure washers, and water pumps commercialized by Koshin America.
The warranty period begins from the date of purchase and is in effect for two (2) years or 1500 hours. Koshin America will
repair or replace, at its discretion, any parts determined to be defective under typical use by an authorized service provider or
by Koshin America. Koshin America reserves the right to make the final decisions on all warranty approval.
The warranty does not apply to engines or other components specifically covered and administered by another
manufacturer. The warranty period and requirements for approval are defined separately for these components and Koshin
America cannot determine warrantability in the event of a failure.
Requirements:
1. Any and all warranty repairs and/or concerns, must be performed and/or addressed by an Authorized/Certified Koshin
America service center.
2. Proof of purchase must be provided that clearly defines date of purchase and the product model.
3. Warranty expenses may be limited by the approved rates and service schedule published to the service center network.
4. The warranty is not transferable, therefore, the claim must be made by the original owner.
5. Product must have been maintained according to published schedules using genuine service parts.
The warranty does not cover:
1. Any unit built/manufactured prior to December 10, 2011.
2. Costs of normal maintenance or replacement/repair of normal wear parts.
3. Any failure caused by contaminated fuels, oils, or lack of proper fuels, oils.
4. Failures caused by any external cause or act of God such as, but not limited to, collision, fire, theft, freezing, vandalism,
riot or wars, lightning, earthquake, windstorm, hail, volcanic eruption, water or flood, tornado, hurricane, terrorist acts or
situations outside reasonably anticipated conditions.
5. Products that are modified or altered in a manner not authorized by Koshin America in writing.
6. Failures due, but not limited to, normal wear and tear, accident, misuse, abuse, negligence, or improper application.
7. Any incidental, consequential or indirect damages caused by a warrantable or non-warrantable product failure.
8. Any costs relate to delay in repair or replacement of the defective part(s).
9. Telephone, fax, cell phone, or other communication expenses.
10. Rental equipment used while warranty repairs are being performed or required for any purpose related to a warranty
repair.
11. Overtime, holiday, or emergency labor.
12. Any transport costs related to a warranty claim.
13. Any expenses incurred investigating performance complaints unless a warrantable failure was the direct cause of the
problem.
14. Starting batteries, fuses, or light bulbs.
15. Overnight or other expedited freight costs related to deliver of parts used in warrantable repairs.
THIS WARRANTY IS IN PLACE OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED. KOSHIN AMERICA DOES
NOT GUARANTEE THE PRODUCT FOR ANY SPECIFIC PURPOSE NOT CLEARLY STATED.
Any limitations not allowed by certain states may not apply to the purchaser, with specific rights varying from location to
location.

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WARRANTY REGISTRATION
Complete Machine Registration
Fill out the Warranty Registration Form in this section, keep a copy for your records
and mail form to:
Koshin America Corporation
1218 Remington Rd
Schaumburg, IL 60173
Customer Service: 1-800-634-4092
e-mail: [email protected]
Note: Completion of this form within 30 days of purchase validates the warranty.

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0069297 9
Registered To
First Name Last Name
Address
City State Zip Code
Country Telephone Email
User Information
Is this your first purchase of a Koshin product?
Yes
No
Why did you select this product? (check all appropriate boxes)
Salesman
Recommendation
Brand Recognition
Quality Price
Would you like to receive information about other Koshin products? (check all appropriate boxes)
Stationary Generator
Portable Generator Material Handling Pressure Washers
Purchase From Store Internet(list website
below) Other
Purchased From
Address
City State
Zip Date of purchase
Product Details
Model Number
Serial Number
Are you satisfied with the product you purchased? Yes No
When you need to replace your machine will you consider another Koshin product? Yes No
SERVICING DISTRIBUTOR/USER ACKNOWLEDGEMENT
1. The Purchaser has been instructed and/or has read the manual and understands proper preventative
maintenance, general operation and safety precautions.
2. The warranty and limitation of liability has been reviewed and understood by the owner/user.
3. Koshin America reserves the right to make design changes or modifications of Koshin products at anytime
without incurring any obligation to make similar changes or modifications on previously sold units.

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-- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- fold -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
Koshin America Corporation
1218 Remington Rd
Schaumburg, IL 60173
Customer Service: 1-800-634-4092
e-mail: [email protected]
Place
Stamp
Here

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0069297 11
OPERATION
GENERAL INFORMATION
This manual has been prepared to acquaint you with the operation and maintenance of this product. Study the
information provided carefully to avoid problems associated with improper application or maintenance. Upon
receipt of your generator, verify that it is complete and in good condition.
The generator is comprised of a 4 stroke, air-cooled engine directly coupled to a 2 pole alternator producing
either 125VAC or 125/250VAC depending on model. The no-load speed is approximately 3750rpm with the
speed under load going to approximately 3600rpm thus producing a frequency of 60Hz.
INITIAL INSPECTION
Upon receiving your generator set, inspect the product to
make sure it is complete and in good condition. Handle
with care and place in a suitable site for storage or
operation.
GROUND CONNECTION
The generator can be grounded to earth to reduce the
chance of electrical shock. To do this you will need a
grounding rod and an appropriately sized copper ground
wire. Drive the ground rod into the earth, connect one end
of the copper wire to the rod and connect the other end to
the external ground connection on the generator set. This
is a general explanation, consult National and Local
electrical codes to ensure compliance.
BEFORE START-UP
ENGINE FUEL
Use Unleaded Gasoline with minimum Octane 86. Check
the fuel gauge beside the fuel fill and add as necessary.
ENGINE OIL
The engine manual or other information provided by the
engine manufacturer supersedes data provided here.
Proper oil grade varies with climate. The grade listed in
the table is typically a good grade but consult the engine
manual to verify proper grade. The oil fill ports are located
on both sides of the engine. The gray filler cap has an
integral dipstick. Add the proper amount of oil and check
the level using the dipstick. NOTE: The dipstick should be
placed into the filler opening but not screwed in to check
the level.
ENGINE HP Capacity Grade
Honda GX160 5.5 0.63 qt API SJ SAE 10W-30
POSITIONING
•Place the generator set on a flat and solid
surface to prevent it from sinking.
•The surface should not be more than 17°from
horizontal in any direction for the engine to
lubricate properly.
•Keep fuel, oil or other explosives at a safe
distance from the generator set.
•Select a site that is well ventilated and protected
from the weather.
•When indoor use cannot be avoided, provide
excellent ventilation for exhaust, cooling, and
combustion requirements.
•Place the generator set safely away from people
and animals.
OPERATION
Check the engine oil before each use. Never
operate the generator set with insufficient oil.
GENERATOR SET OVERLOAD
Do not exceed the rated load of the generator set when
operating continuously. Before connecting items to the
generator set, determine the total electrical requirements
of the products to be connected. The requirement of each
item is generally given on the manufacturer’s nameplate.
Below is a list of commonly used items and typical
requirements. Use this list as a guideline only if no other
data is available.

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GENERAL WATTAGE GUIDE
Item Running Watts
Air Conditioner (12000 Btu) (*)...........................1750
Air Compressor (1/2 hp) (*)................................1400
Air Compressor (3/4 hp) (*)................................1800
Air Compressor (1 hp) (*)...................................2000
Battery Charger (25A)..........................................600
Belt Sander (3” belt)...........................................1000
Circular Saw (7 1/4”)...................................825-1050
Coffee Maker ..............................................900-1100
Edger (lawn).........................................................550
Furnace Fan (1/3 hp) (*).....................................1200
Hot Plate (single) ...............................................1500
Impact wrench......................................................600
Light Bulb..................................................Bulb rating
Nail Gun.............................................................1200
Microwave............................................................750
Paint Sprayer (1/3 hp) (*).....................................650
Paint Sprayer, hand-airless..................................175
Radio...............................................................50-200
Refrigerator (*).....................................................600
Table Saw (10”) (*).............................................2000
Television......................................................250-550
Weed Trimmer .....................................................500
Note: (*) Items allow at least 3 times the listed
wattage for starting.
NOTE: Many appliances such as saws or drills draw more
current than indicated on the manufacturer’s nameplate
when under severe load.
STARTING THE GENERATOR SET
Before attempting to start the generator set, ensure that
all instructions given in previous sections have been
followed completely.
•Check oil and fuel levels.
•Turn the fuel valve under the fuel tank on.
•Turn the fuel valve on the front of the engine on.
•Move the choke lever on the front of the engine on.
Note: the choke may not be required when the engine
is warm or in high ambient temperatures.
•Turn idle-control On/Off switch OFF.
RECOIL START
•Move engine On/Off switch to On position.
•Slowly pull recoil cord until resistance is felt and then
pull firmly. Let the recoil rewind slowly to avoid
damage.
•Return the choke to the original position.
CAUTION: This generator is equipped with an oil
protection system. When oil levels are too low for safe
operation the engine will shut down and/or will not start
until the oil level is corrected.
OPERATING THE GENERATOR SET
Once started, allow the engine to stabilize for
approximately 3 minutes. Check that the circuit breakers
and the GFCI receptacles are not tripped.
STOPPING THE GENERATOR SET
Unplug all appliances and let the engine run unloaded for
a couple of minutes. Turn the fuel valve on the front of the
engine to the Off position where installed. Turn the engine
On/Off switch to the Off position. Turn the fuel valve on
the fuel tank Off. CAUTION: Never use the choke to stop
the engine.
GENERATOR APPLICATION
WHAT IS A GENERATOR
A generator is basically a prime mover, typically a
gasoline or diesel engine, coupled to an alternator to
produce electricity. It is very useful as a substitute power
source during power outages or as the primary source in
remote locations where power is not available.
Generators are essential for people such as contractors
or farmers who are always in need of portable power.
They are also very convenient for recreational use.
SELECTING A GENERATOR
Selecting the proper generator is important. A generator
that is too small for your application will not run all of the
equipment needed. A generator that is too large will cost
more and if never used to its potential the money is
wasted. The correct size generator is determined by
totaling the wattage requirements of the items to be used
simultaneously, determine additional starting wattage
requirements and total these numbers. Select a generator
with a continuous rating that exceeds this by about 20%
to allow for expansion. See the table in the section titled
“Generator Set Overload” for some wattage guidelines of
common equipment.
RATED vs. SURGE WATTS
Rated, or continuous, watts are the watts an item needs
as it is running.
Surge, or maximum, watts are the watts an item needs to
start. This is typically 2-4 times the rated watts.
This information is typically provided on the
manufacturer’s nameplate. If watts are not provided, it
can be calculated using the formula: Watts=Amps x Volts.

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EXTENSION CORDS
An extension cord should always be in good condition
with no damage to the wires or sheathing. Never run an
extension cord through water. The correct wire size for an
extension cord can be determined from the table that
follows.
Continuous
Load Minimum Cord Gauge (AWG)
Amps 0-50 Feet 50-100 Feet 100-150
Feet
20 12 10 8
25 12 10 6
30 10 8 6
35 10 8 4
40 8 6 2
50 6 4 2
LOADING YOUR GENERATOR SET
With reference to the Receptacle details section, please
review the power receptacles fitted to your generator. The
circuit breaker rating and the generator rating drive the
actual load that may be pulled from each receptacle. The
ratings shown in the table are the maximum available from
each receptacle. DO NOT EXCEED THE INDIVIDUAL
RECEPTACLE RATINGS AS SHOWN IN THE TABLE
BELOW. DO NOT EXCEED THE TOTAL GENERATOR
RATING SHOWN IN TABLE 2 PERFORMANCE
SPECIFICATIONS. All generator units are equipped with
a thermal-magnetic main circuit breaker as well as a
“PUSH TO RESET” breaker on branch circuits.
AMPERAGE RATE TABLE
Model NEMA 5-20R
125V GFCI
NEMA L5-30R
125V
Twistlock
GEH-3100DX 20Amps 25Amps
ENGINE LIMITATIONS ON GENERATOR
PERFORMANCE
Generator ratings assume 60°F (20C) and Sea
Level. Operation of your generator at temperatures
above 60°F (20C) or above Sea Level will result in
lower electrical output. Electrical output must be
derated 1% for each 10°F above 60°F and 3 ½ %
for each 1000 feet above mean sea level.
GENERATOR CLEANING
CAUTION: ALWAYS SHUT DOWN THE
GENERATOR AND ALLOW IT TO COOL
COMPLETELY BEFORE PERFORMING
CLEANING OPERATIONS.
WARNING: DO NOT USE HIGH PRESSURE
WATER OR A GARDEN HOSE TO CLEAN
YOUR GENERATOR. WATER INTRODUCED
INTO THE GENERATOR CAN CAUSE ELECTRICAL
SHORTS, GENERATOR DAMAGE OR PERSONAL
INJURY.
•Compressed air (max. 25 psi) may be used to blow
loose dirt and dust from your generator. DO NOT
DIRECT COMPRESSED AIR DIRECTLY INTO ANY
OPENING IN THE GENERATOR OR ENGINE.
•Use a dampened cloth to wipe clean exterior
surfaces.
•Use a soft bristle brush to clean/ loosen heavy dirt, oil
or grease deposits.
•NEVER insert rags, tools or any device into the
generator or engine openings.
GENERAL STORAGE GUIDELINES
WARNING: GASOLINE FUMES ARE FLAMMABLE. DO
NOT STORE YOUR GENSET IN ANY AREA THAT IS
INDOOR OR IN POORLY VENTILATED AREAS.
GASOLINE FUMES CAN IGNITE IN THE PRESENCE
OF ANY OPEN FLAME, PILOT LIGHT, CLOTHES
DRYER, WATER HEATER, ETC.
•Your generator should be started and operated for
several minutes at least every 30 days.
•If the generator cannot be operated every 30 days,
follow the storage recommendations within the engine
documentation.
•NOTE: A fuel shut-off valve is positioned at the base
of the fuel tank. The valve should be closed during
storage periods.

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0069297 14
RECEPTACLE DETAILS
The receptacles shown in this section are for reference only. Each receptacle is not available on all generators.
NEMA 5-20R
125V - 20A NEMA L5-30R 125V - 30A NEMA L6-30R 250V - 30A NEMA L6-20R 250V - 20A
NEMA 14-50R
125/250V - 50A NEMA L14-30R
125/250V - 30A
NEMA L14-20R
125/250V - 20A
GENERAL MAINTENANCE
Proper maintenance and service are required to achieve maximum engine life and maintain warranty. The following tables
provide engine specifications as well as maintenance schedules for the generator engines. Note that the generator models
are referenced with the engine model. An engine owner’s manual is provided with each machine that also provides basic
maintenance and troubleshooting information. Defer to the engine manufacturers manual if any discrepancies appear
between the data provided in this manual and the engine owner’s manual. Full engine service manuals are available from
American Honda Motor Co., 4900 Marconi Drive, Alpharetta, GA 30005-8847, [phone].
ENGINE SPECIFICATIONS AND CAPACITIES
Model GX160
(GEH-3100DX)
Type 4-stroke, overhead valve single cylinder,
inclined 25°
Displacement 163cc (9.9 cu in)
Bore and
Stroke 68 x 45 mm (2.7 x 1.8 in)
Max. HP 5.5 hp @3600rpm
Max. Torque 8ft-lb @2500rpm
Compression
Ratio 8.5 : 1
Cooling
System Forced-air
Ignition System Transistorized magneto
Ignition Timing 25°B.T.D.C. (fixed)
Spark Plug BPR6ES (NGK), W20EPR-U (Nippondenso)
Carburetor Horizontal type, butterfly valve
Air Cleaner Dual element type

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0069297 15
Lubricating
System Splash
Oil Capacity 0.6l (0.63 US qt)
Starting
System Recoil
Stopping
System Ignition primary circuit ground
Fuel Type Unleaded gasoline (86 pump octane)
PTO Shaft
Rotation Counterclockwise (from PTO side)
Dry Weight 15.1kg (33 lb)
OIL SELECTION
Proper oil selection as well as proper oil level is critical to achieve maximum engine life. Use high detergent, premium quality
motor oil certified for service class SJ that should be designated on the container. SAE 10W-30 is recommended for general,
all temperature use. Use the table below to select the proper oil for the temperature in your area.
Viscosity -30C/-22F -20C/-4F -10C/14F 0C/32F 10C/50F 20C/68F 30C/86F 40C/104F
Single 10W
20W
20
30
40
Multi 20W-40,20W-50
15W-40, 15W-50
10W-40
10W-30
ENGINE MAINTENANCE SCHEDULE
ITEM
Each Use First Month
Or
20 Hrs
3 Months
Or
50Hrs
6 Months
Or
100Hrs
Every year
Or
300Hrs
Oil Check X
Change X X
Air Cleaner Check X
Clean X(1)
Sediment Cup Clean X
Spark Plug Check-Clean X
Spark Arrestor Clean X
Valve Clearance Check-Adjust X(2)
Fuel Tank and Strainer Clean X(2)
Fuel Line Check Replace as necessary.
Notes:
(1) Service more frequently in dusty areas.
(2) Should be serviced by authorized dealer unless owner has proper tools and is mechanically proficient. See engine
Shop Manual for instructions.

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0069297 16
DAILY INSPECTION
1. Recoil Starter Cord
2. Engine Oil Level
3. Check for Engine Oil or Fuel Leaks
4. Inspect Spark Plug Cables
5. Inspect Cooling System for Cleanliness
6. Listen for Abnormal Noise
7. Look for Abnormal Vibration
FAULT FINDING GUIDE
SYMPTOMS PROBABLE CAUSES CORRECTION
ENGINE WILL NOT START 1. Oil level too low.
2. No fuel or valve(s) turned off.
3. Start switch turned Off.
4. Blocked or leaking fuel system.
5. Clogged air filter.
6. Genset under load at start-up.
1. Add oil.
2. Add fuel and/or turn valve(s) on.
3. Turn switch On.
4. Repair fuel system.
5. Clean or replace air filter.
6. Disconnect load.
NO POWER OUTPUT 1. Circuit breaker tripped.
2. GFCI receptacle tripped.
3. Faulty circuit breaker.
4. Faulty receptacle.
5. Faulty capacitor in alternator.
6. Faulty diodes in alternator.
7. Failure in alternator windings.
1. Reset circuit breaker.
2. Reset GFCI receptacle.
3. Replace circuit breaker.
4. Replace receptacle.
5. Replace capacitor.
6. Replace diodes.
7. Repair or replace alternator.
NOISY MACHINE 1. Damaged bearing.
2. Damaged exhaust system.
3. Loose or rattling parts.
1. Replace bearing.
2. Repair or replace.
3. Repair loose or rattling parts.
OVERHEATING 1. Ventilation openings blocked.
2. Overload.
3. Ambient temperature too high.
1. Clear ventilation openings.
2. Verify load levels.
3. Provide better ventilation for
cooling.
CIRCUIT BREAKER TRIPS 1. Overloaded circuit.
2. Faulty equipment or cable.
3. Faulty circuit breaker.
1. Reduce load.
2. Check, repair or replace.
3. Replace circuit breaker.

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0069297 17
PARTS ORDERING
GENERAL
This publication, which contains an illustrated parts breakdown, has been prepared as an aid in locating those
parts which may be required in the maintenance of the unit. All of the parts listed in the parts breakdown are
manufactured with the same precision as the original equipment. For the greatest protection always insist on
genuine Koshin America parts for your generator.
NOTE: Koshin America can bear no responsibility for injury or damages resulting directly from the use of non-
approved repair parts.
Special order parts may not be included in this manual. Contact the local Koshin Parts provider with the unit
serial number for assistance with these special parts.
DESCRIPTION
The parts breakdown illustrates and lists the detailed parts which make up this particular machine. This covers
the standard models and the more popular options that are available. The part number, the description of the
part and the quantity of parts required are shown on each illustration.
The quantities specified are the number of parts used per one assembly and are not necessarily the total
number of parts used in the machine. Where no quantity is specified the quantity is assumed to be one.
Each description of a part is based upon the “noun first” method, i.e., the identifying noun or item name is always
the first part of the description. The noun name is generally followed by a single descriptive modifier. The
descriptive modifier may be followed by words or abbreviations such as upper, lower, inner, outer, front, rear,
RH, LH, etc. when they are essential.
MARKINGS AND DECALS
NOTE: Do not paint over safety warnings or instructional decals. If safety warning decals become illegible,
immediately order replacements from the factory.
Part numbers for original individual decals and their mounting locations are shown within Parts List Section.
These are available as long as a particular model is in production. Afterwards, service sets of exterior decals
and current production safety warning decals are available.
HOW TO USE PARTS LIST
•Turn to Parts List Section.
•Locate the area of the machine in which the desired part is used and find illustration.
•Locate the desired part on the illustration by visual identification and make note of part number and
description.
HOW TO ORDER
The satisfactory ordering of parts by a purchaser is greatly dependent upon the proper use of all available
information. By supplying the nearest sales office, autonomous company or authorized distributor, with
complete information, you will enable them to fill your order correctly and to avoid any unnecessary delays.
In order that all avoidable errors may be eliminated, the following instructions are offered as a guide to the
purchaser when ordering replacement parts:
•Always specify the model number of the machine.
•Always specify the serial number of the unit. THIS IS IMPORTANT.
•Always specify the number of the parts list publication.
•Always specify the quantity of parts required.
•Always specify the part number, as well as the description of the part, or parts, exactly as it is given on the
parts list illustration.

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0069297 18
In the event parts are being returned to your nearest sales office, autonomous company or authorized
distributor, for inspection or repair, it is important to include the serial number of the unit from which the parts
were removed.
TERMS AND CONDITIONS ON PARTS ORDERS
Acceptance: Acceptance of an offer is expressly limited to the exact terms contained herein. If purchaser’s
order form is used for acceptance of an offer, it is expressly understood and agreed that the terms and
conditions of such order form shall not apply unless expressly agreed to by Koshin America Corporation
(“Company”) in writing. No additional or contrary terms will be binding upon the Company unless expressly
agreed to in writing.
Taxes: Any tax or other governmental charge now or hereafter levied upon the production, sale, use or
shipment of material and equipment ordered or sold is not included in the Company’s price and will be charged
to and paid for by the Purchaser.
Shipping dates shall be extended for delays due to acts of God, acts of Purchaser, acts of Government, fires,
floods, strikes, riot, war, embargo, transportation shortages, delay or default on the part of the Company’s
vendors, or any other cause beyond the Company’s reasonable control.
Should Purchaser request special shipping instruction, such as exclusive use of shipping facilities, including air
freight when common carrier has been quoted and before change order to purchase order can be received by
the Company, the additional charges will be honored by the Purchaser.
Warranty: The Company warrants that parts manufactured by it will be as specified and will be free from
defects in materials and workmanship.
The Company’s liability under this warranty shall be limited to the repair or replacement of any part which was
defective at the time of shipment provided Purchaser notifies the Company of any such defect promptly upon
discovery, but in no event later than three (3) months from the date of shipment of such part by the Company.
The only exception to the previous statement is the extended warranty as it applies to the special airend
exchange program.
Repairs and replacements shall be made by the Company F.O.B. point of shipment. The Company shall not be
responsible for costs of transportation, removal or installation.
Warranties applicable to material and equipment supplied by the Company but wholly manufactured by others
shall be limited to the warranties extended to the Company by the manufacturer which are able to be conveyed
to the Purchaser.
Delivery: Shipping dates are approximate. The Company will use best efforts to ship by the dates specified;
however, the Company shall not be liable for any delay or failure in the estimated delivery or shipment of
material and equipment or for any damages suffered by reason thereof.
This company makes no other warranty or representation of any kind whatsoever, expressed or implied, except
that of title, and all implied warranties, including any warranty of merchantability and fitness for a particular
purpose, are hereby disclaimed.

GEH-3100DX GENERATOR PARTS
0069297 19
GENERATOR PARTS LISTS
GEH-3100DX GENERATOR PART LISTS
ITEM QTY PART NO. DESCRIPTION ITEM QTY PART NO. DESCRIPTION
1 1 VA40011033-9005 Welded Assembly, Frame 14 1 GU0163 Spacer
2 1 ENGINE HONDA GX160 15 1 Ground Assy Ground Wire Assy
3 1 VA9503-9005 Heat Shield 16 5 0064771 Nut, M8 - Nylon Insert
4 1 VA9504-9005 Shield, Muffler 17 5 0000992 Flatwasher, M8 (5/16”)
5 1 G51398 11 Liter Tank 18 12 G020803 Flange Bolt, M6x16 Z
6 1 GU0025 Fuel Cap 19 9 G034909 M6 Cage Nut
7 1 Alternator Model ES80B 20 4 GU0149 Flange Bolt, M6x20 Z
8 2 G052113 Vibro Isolator - 30 X 30 21 4 G041412 M6 Fender Washer
9 1 G052182 Vibration Isolator, 30 X 30 22 2 G041104 M6 Lockwasher
10 1 SA40011034 Panel Assembly, GEH-3100DX 23 2 G032301 Nut, M6
11 1 VA9501-9005 Control Panel Box 24 1 Clip, Valve Mount
12 1 G085102 Fuel Valve 25 1 GU0101 Nut, M6 Nylock, YC
13 1 GU0023 Fuel Valve Bracket 26 2 Screw, M3x6

GEH-3100DX GENERATOR PARTS
0069297 20
GA9502
G071410
G071406
G034909
G075239
G075766
G075532
G041308
GU0184
G034308
G92729
0000992 (5/16”)
0004416