Generac Power Systems GP Series User manual

GP Series Portable Generator
Owner’s Manual
Register your Generac product at:
WWW.GENERAC.COM
1-888-GENERAC
(1-888-436-3722)
SAVE THIS MANUAL FOR FUTURE REFERENCE
004449
MODEL:________________________
SERIAL:________________________
DATE PURCHASED:______________
(000209a)
WARNING
This product is not intended to be used in
a critical life support application. Failure to
adhere to this warning could result in
death or serious injury.

Table of Contents
Section 1 Introduction and Safety 1
Introduction ..................................... 1
Safety Rules .................................... 1
Safety Symbols and Meanings ........ 1
Exhaust and Location Hazards ....... 2
Electrical Hazards ........................... 2
Fire Hazards .................................... 3
Standards Index .............................. 3
Section 2 General Information and
Setup .............................................. 4
Know Your Generator ..................... 6
Connection Plugs ............................ 8
Hour Meter ...................................... 9
Remove Contents from Carton ....... 9
Assembly ......................................... 9
Add Engine Oil .............................. 10
Fuel ............................................... 11
Section 3 Operation .................... 12
Operation and Use Questions ....... 12
Before Starting Engine .................. 12
Prepare Generator for Use ............ 12
Grounding the Generator When Used
as a Portable ................................. 12
Know Generator Limits .................. 13
Transporting/Tipping of the Unit .... 13
Starting Pull Start Engines ............ 14
Generator Shut Down ................... 14
Low Oil Level Shutdown System ... 14
Section 4 Maintenance and
Troubleshooting ..........................15
Maintenance ..................................15
Maintenance Schedule ..................15
Preventive Maintenance ................15
Engine Maintenance ......................15
Inspect Muffler and Spark Arrester 17
Valve Clearance ............................17
Storage ..........................................17
Troubleshooting .............................18
Notes .............................................19

Owner’s Manual for Portable Generator 1
Section 1 Introduction and Safety
Introduction
Thank you for purchasing a Generac Power
Systems Inc. product. This unit has been
designed to provide high-performance, effi-
cient operation, and years of use when main-
tained properly.
If any section of the manual is not understood,
contact your nearest Independent Authorized
Service Dealer (IASD), or contact Generac
Customer Service at 1-888-GENERAC (1-
888-436-3722), or www.generac.com with any
questions or concerns.
The owner is responsible for proper mainte-
nance and safe use of the equipment. Before
operating, servicing or storing this generator:
• Study all warnings in this manual and on
the product carefully.
• Become familiar with this manual and the
unit before use.
• Refer to the Assembly section of the man-
ual for instructions on final assembly proce-
dures. Follow the instructions completely.
Save these instructions for future reference.
ALWAYS supply this manual to any individual
that will use this machine.
The information in this manual is accurate
based on products produced at the time of
publication. The manufacturer reserves the
right to make technical updates, corrections,
and product revisions at any time without
notice.
Safety Rules
The manufacturer cannot anticipate every
possible circumstance that might involve a
hazard. The alerts in this manual, and on tags
and decals affixed to the unit, are not all inclu-
sive. If using a procedure, work method, or
operating technique that the manufacturer
does not specifically recommend, verify that it
is safe for others and does not render the
equipment unsafe.
Throughout this publication, and on tags and
decals affixed to the unit, DANGER, WARN-
ING, CAUTION, and NOTE blocks are used to
alert personnel to special instructions about a
particular operation that may be hazardous if
performed incorrectly or carelessly. Observe
them carefully. Alert definitions are as follows:
NOTE: Notes contain additional information
important to a procedure and will be found
within the regular text of this manual.
These safety alerts cannot eliminate the haz-
ards that they indicate. Common sense and
strict compliance with the special instructions
while performing the action or service are
essential to preventing accidents.
Safety Symbols and Meanings
• If you start to feel sick, dizzy, or weak after
the generator has been running, move to
fresh air IMMEDIATELY. See a doctor, as
you could have carbon monoxide poison-
ing.
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
(000001)
DANGER
Indicates a hazardous situation which, if not avoided,
will result in death or serious injury.
(000002)
WARNING
Indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
(000003)
CAUTION
Indicates a hazardous situation which, if not avoided,
could result in minor or moderate injury.
000657
DANGER
Using a generator indoors CAN KILL YOU IN MINUTES.
Generator exhaust contains carbon monoxide. This is
a poison you cannot see or smell.
NEVER use inside a home
or garage, EVEN IF doors
and windows are open.
Only use OUTSIDE and
far away from windows,
doors, and vents.
(000103)
DANGER
Asphyxiation. Running engines produce carbon
monoxide, a colorless, odorless, poisonous gas.
Carbon monoxide, if not avoided,
will result in death or serious injury.
(000179a)
DANGER
The exhaust system must be properly maintained. Do
not alter or modify the exhaust system as to render it
unsafe or make it noncompliant with local codes and/or
standards. Failure to do so will result in death
or serious injury.

2 Owner’s Manual for Portable Generator
• For safety reasons, it is recommended that
the maintenance of this equipment be per-
formed by an IASD. Inspect the generator
regularly, and contact the nearest IASD for
parts needing repair or replacement.
Exhaust and Location Hazards
• If you start to feel sick, dizzy, or weak after
the generator has been running, move to
fresh air IMMEDIATELY. See a doctor, as
you could have carbon monoxide poison-
ing.
Electrical Hazards
(000104)
DANGER
Electrocution. Water contact with a power source,
if not avoided, will result in death or serious injury.
(000116)
DANGER
Electrocution. Turn utility and emergency
power supplies to OFF before connecting power
source and load lines. Failure to do so will result
in death or serious injury.
(000146)
WARNING
Equipment and property damage. Do not alter
construction of, installation, or block ventilation for
generator. Failure to do so could result in unsafe
operation or damage to the generator.
(000178a)
Asphyxiation. Always use a battery operated carbon
monoxide alarm indoors and installed according to
the manufacturer’s instructions. Failure to do so
could result in death or serious injury.
WARNING
(000250)
WARNING
Equipment and property damage. Do not operate unit on
uneven surfaces, or areas of excessive moisture, dirt, dust
or corrosive vapors. Doing so could result in death, serious
injury, property and equipment damage.
(000111)
WARNING
Moving Parts. Keep clothing, hair, and appendages
away from moving parts. Failure to do so could
result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operting machine, do not
touch hot surfaces. Keep machine away from
combustables during use. Hot surfaces
could result in severe burns or fire.
(000142)
Do not insert any object through the air cooling slots.
Generator can start at any time and could result in
death, serious injury, and unit damage.
WARNING
WARNING
Risk of injury. Do not operate or service this machine
if not fully alert. Fatigue can impair the ability to service
this equipment and could result in death or serious
injury. (000215)
WARNING
Injury and equipment damage. Do not use generator
as a step. Doing so could result in falling, damaged
parts, unsafe equipment operation, and could result
in death or serious injury. (000216)
000406
(000103)
DANGER
Asphyxiation. Running engines produce carbon
monoxide, a colorless, odorless, poisonous gas.
Carbon monoxide, if not avoided,
will result in death or serious injury.
(000179a)
DANGER
The exhaust system must be properly maintained. Do
not alter or modify the exhaust system as to render it
unsafe or make it noncompliant with local codes and/or
standards. Failure to do so will result in death
or serious injury.
(000146)
WARNING
Equipment and property damage. Do not alter
construction of, installation, or block ventilation for
generator. Failure to do so could result in unsafe
operation or damage to the generator.
(000178a)
Asphyxiation. Always use a battery operated carbon
monoxide alarm indoors and installed according to
the manufacturer’s instructions. Failure to do so
could result in death or serious injury.
WARNING
(000144)
DANGER
Electrocution. Contact with bare wires,
terminals, and connections while generator
is running will result in death or serious injury.
(000104)
DANGER
Electrocution. Water contact with a power source,
if not avoided, will result in death or serious injury.

Owner’s Manual for Portable Generator 3
• The National Electric Code (NEC) requires
the frame and external electrically conduc-
tive parts of the generator be properly con-
nected to an approved earth ground. Local
electrical codes may also require proper
grounding of the generator. Consult with a
local electrician for grounding requirements
in the area.
Fire Hazards
• Do not operate the generator if connected
electrical devices overheat, if electrical out-
put is lost, if engine or generator sparks or if
flames or smoke are observed while unit is
running.
• Keep a fire extinguisher near the generator
at all times.
Standards Index
1. National Fire Protection Association
(NFPA) 70: The NATIONAL ELECTRIC
CODE (NEC) available from www.nfpa.org
2. National Fire Protection Association
(NFPA) 5000: BUILDING CONSTRUC-
TION AND SAFETY CODE available from
www.nfpa.org
3. International Building Code available from
www.iccsafe.org
4. Agricultural Wiring Handbook available
from www.rerc.org, Rural Electricity
Resource Council P.O. Box 309 Wilming-
ton, OH 45177-0309
5. ASAE EP-364.2 Installation and Mainte-
nance of Farm Standby Electric Power
available from www.asabe.org, American
Society of Agricultural & Biological Engi-
neers 2950 Niles Road, St. Joseph, MI
49085
6. Safety and Performance of Portable Gen-
erators ANSI/PGMA G300 available from
pgmaonline.com
This list is not all inclusive. Check with the
Authority Having Jurisdiction (AHJ) for any
local codes or standards which may be appli-
cable to your jurisdiction.
(000145)
DANGER
Electrocution. In the event of electrical accident,
immediately shut power OFF. Use non-conductive
implements to free victim from live conductor. Apply
first aid and get medical help. Failure to do so will
result in death or serious injury.
(000130)
WARNING
Accidental Start-up. Disconnect the negative battery
cable, then the positive battery cable when working
on unit. Failure to do so could result in death
or serious injury.
(000105)
DANGER
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Add fuel in a well
ventilated area. Keep fire and spark away. Failure to
do so will result in death or serious injury.
(000166)
DANGER
Do not overfill fuel tank. Fill to 1/2 in. of top of tank to
allow for fuel expansion. Overfilling may cause fuel to
spill onto engine causing fire or explosion, which will
result in death or serious injury.
(000174)
DANGER
Risk of fire. Allow fuel spills to completely dry
before starting engine. Failure to do so will
result in death or serious injury.
(000142)
Do not insert any object through the air cooling slots.
Generator can start at any time and could result in
death, serious injury, and unit damage.
WARNING

4 Owner’s Manual for Portable Generator
Section 2 General Information and Setup
Figure 2-1. Features and Controls
TABLE 1. Generator Components
Figure 2-2. GP1000 Control Panel (Argentina,
Chile) / GP1100 (Peru)
004453
004454
004452
17
12
14
15
19
21
13
16
18
11
20
1 Engine Run/Stop Switch
2 Hour Meter
3 220 Volt Universal Receptacle
4 Push Button Circuit Breaker
5 Grounding Lug
6 120 Volt, 15 Amp Receptacle
(NEMA 5-15)
7 Toggle Circuit Breaker
8 120 Volt, 20 Amp Duplex Receptacle
(5-20R)
9 120/240 Volt, 20 Amp Twistlock
Receptacle (L14-20R)
10 120 Volt 20 Amp Receptacle (NEMA 5-20)
11 Fuel Tank
12 Gas Cap
13 Choke Knob
14 Air Filter
15 Fuel Shut Off
16 Recoil Starter
17 Fuel Gauge
18 Handle
19 Oil Fill / Dipstick
20 Oil Drain
21 Muffler
004455
1 2 3
5 4

Owner’s Manual for Portable Generator 5
Figure 2-3. GP1100 Control Panel (Colombia,
Mexico, Venezuela)
Figure 2-4. GP2000 Control Panel (Argentina,
Chile) / GP2200 (Peru)
Figure 2-5. GP2200 Control Panel (Colombia,
Mexico, Venezuela)
Figure 2-6. GP2800 Control Panel (Argentina,
Chile) / GP 3300 (Peru)
Figure 2-7. GP3300 Control Panel (Colombia,
Mexico, Venezuela)
Figure 2-8. Unit Identification Label
Figure 2-9. Unit Identification Label
(GP2000 and GP2200)
9$&
21 2))
+2856 
2))
21
+= 9$&
$


004456
1 2 6
5 4
004457
1 2 3
5
7
1/10
HOURS
004458
1 2 10
5
7
+=
+2856 
2))
21
$
9$& 9$&
21
2))
0
1
004460
1
2
3
5
7
+2856 
21
2))
21
9$&
9$&
$
+=
2))


004459
1
2
8
7
9
8
004450
004451

6 Owner’s Manual for Portable Generator
Know Your Generator
Replacement owner’s manuals are available
at www.generac.com.
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.
TABLE 2. Product Specifications
GP1000 Generator Specifications (Argentina, Chile)
Rated Power 1000 Watts**
Surge Power 1250 Watts**
Rated AC Voltage 220 VAC
Rated AC Load 4.5 Amps**
Rated Frequency 50 Hz @ 3000 RPM
Phase Single Phase
Unit Weight (Dry) 56 lbs. (25.4 kg)
GP1100 Generator Specifications (Colombia, Mexico, Venezuela / Peru)
Rated Power 1100 Watts**
Surge Power 1375 Watts**
Rated AC Voltage 120 VAC / 220 VAC
Rated AC Load 9.2 Amps** / 5 Amps**
Rated Frequency 60 Hz @ 3600 RPM
Phase Single Phase
Unit Weight (Dry) 56 lbs. (25.4 kg)
GP2000 Generator Specifications (Argentina, Chile)
Rated Power 2000 Watts**
Surge Power 2500 Watts**
Rated AC Voltage 220 VAC
Rated AC Load 9.0 Amps**
Rated Frequency 50 Hz @ 3000 RPM
Phase Single Phase
Unit Weight (Dry) 85 lbs. (38.6 kg)
GP2200 Generator Specifications (Colombia, Mexico, Venezuela / Peru)
Rated Power 2200 Watts**
Surge Power 2800 Watts**
Rated AC Voltage 120 VAC / 220 VAC
Rated AC Load 18.3 Amps** / 10 Amps**
Rated Frequency 60 Hz @ 3600 RPM
Phase Single Phase
Unit Weight (Dry) 85 lbs. (38.6 kg)

Owner’s Manual for Portable Generator 7
GP2800 Generator Specifications (Argentina, Chile)
Rated Power 2800 Watts**
Surge Power 3900 Watts**
Rated AC Voltage 220 VAC
Rated AC Load 12.7 Amps**
Rated Frequency 50 Hz @ 3000 RPM
Phase Single Phase
Unit Weight (Dry) 109 lbs. (49.5 kg)
GP3300 Generator Specifications (Colombia, Mexico, Venezuela / Peru)
Rated Power 3300 Watts**
Surge Power 3750 Watts**
Rated AC Voltage 120/240 VAC / 220 VAC
Rated AC Load 27.5/13.75 Amps** / 15 Amps**
Rated Frequency 60 Hz @ 3600 RPM
Phase Single Phase
Unit Weight (Dry) 109 lbs. (49.5 kg)
** Operating Temperature Range: -18 deg. C (0 deg. F) to 40 Deg. C (104 Deg. F). When operated
above 25 deg. C (77 deg. F) there may be a decrease in power.
** Maximum wattage and current are subject to, and limited by, such factors as fuel Btu content, ambi-
ent temperature, altitude, engine condition, etc. Maximum power decreases about 3.5% for each
1,000 feet above sea level; and will also decrease about 1% for each 6° C (10° F) above 16° C (60°
F) ambient temperature.
GP1000 and GP1100 Engine Specifications
Displacement 93 cc
Spark Plug Part No. 0K95770127
Spark Plug Type E7TC, NGK BP7HS, Champion L87YC or Equivalent
Spark Plug Gap 0.028-0.031 inch (0.71-0.79 mm)
Gasoline Capacity 6 L (1.59 U.S. gallons)
Oil Type See chart in Add Engine Oil.
Oil Capacity 0.4 L (0.423 qt.)
Run Time at 50% Load 7 Hours
GP2000 and GP2200 Engine Specifications
Displacement 163 cc
Spark Plug Part No. 0A45310275
Spark Plug Type F6TC, NGK BP6IS, Champion RN11YC or
Equivalent
Spark Plug Gap 0.028-0.031 inch (0.71-0.79 mm)
Gasoline Capacity 13.25 L (3.5 U.S. gallons)
Oil Type See chart in Add Engine Oil.
Oil Capacity 0.6 L (0.634 qt.)
Run Time at 50% Load 10.5 Hours
TABLE 2. Product Specifications

8 Owner’s Manual for Portable Generator
Connection Plugs
220 Volt Universal Receptacle
The 120 Volt outlet is overload protected by a
20 Amp circuit breaker. See Figure 2-10. Each
receptacle will power 120 Volt AC, single
phase, 60 Hz electrical loads requiring up to
2400 watts (2.4 kW) or 20 Amps of current.
Use only high quality, well-insulated, 3-wire
grounded cord sets rated for 125 Volts at 20
Amps (or greater).
Figure 2-10. 220 Volt Universal Receptacle
120/240 VAC, 20 Amp Receptacle
Use a NEMA L14-20 plug with this receptacle
(rotate to lock/unlock). Connect a suitable 4-
wire grounded cord set to plug and desired
load. The cord set should be rated 250 Volts
AC at 20 Amps (or greater). See Figure 2-11.
Use this receptacle to operate 120 Volt AC, 60
Hz, single phase loads requiring up to 3600
watts (3.6 kW) of power at 20 Amps or 240
Volt AC, 60 Hz, single phase loads. The outlet
is protected by a 30 Amp 2-pole toggle switch
circuit breaker.
Figure 2-11. 120/240 VAC, 20 Amp Receptacle
NEMA L14-20R
120 VAC, 20 Amp, Duplex
Receptacle
The 120 Volt outlet is overload protected by a
20 Amp circuit breaker. See Figure 2-12. Each
receptacle will power 120 Volt AC, single
phase, 60 Hz electrical loads requiring up to
2400 watts (2.4 kW) or 20 Amps of current.
Use only high quality, well-insulated, 3-wire
grounded cord sets rated for 125 Volts at 20
Amps (or greater).
NOTE: Limit length of extension cords to fif-
teen feet, or less, to prevent voltage drop and
overheating of wires.
Figure 2-12. 120 VAC, 20 Amp, Duplex
Receptacle NEMA 5-20R
GP2800 and GP3300 Engine Specifications
Displacement 208 cc
Spark Plug Part No. 0A45310275
Spark Plug Type F6TC, NGK BP6IS, Champion RN11YC or
Equivalent
Spark Plug Gap 0.028-0.031 inch (0.71-0.79 mm)
Gasoline Capacity 13.25 L (3.5 U.S. gallons)
Oil Type See chart in Add Engine Oil.
Oil Capacity 0.6 L (0.634 qt.)
Run Time at 50% Load 9.7 Hours
* Go to www.generac.com or contact an IASD for replacement parts.
TABLE 2. Product Specifications
004465
000625
001630

Owner’s Manual for Portable Generator 9
120 VAC, 20 Amp Receptacle
The 120 Volt outlet is overload protected by a
20 Amp circuit breaker. See Figure 2-13. This
receptacle will power 120 Volt AC, single
phase, 60 Hz electrical loads requiring up to
2400 watts (2.4 kW) or 20 Amps of current.
Use only high quality, well-insulated, 3-wire
grounded cord sets rated for 125 Volts at 20
Amps (or greater).
Figure 2-13. 120 VAC, 20 Amp Receptacle
NEMA 5-20
Hour Meter
The Hour Meter tracks hours of operation for
scheduled maintenance. See Figure 2-14.
• The CHG OIL display will illuminate every
100 hours. The message will flash one hour
before and one hour after each 100 hour
interval, providing a two hour window to
perform service.
• The SVC display will illuminate every 100
hours. The message will flash one hour
before and one hour after each 200 hour
interval providing a two hour window to per-
form service.
When the hour meter is in flash alert mode,
the maintenance message will alternate with
elapsed time in hours and tenths. The hours
will flash four times, then alternate with the
maintenance message four times until the
meter automatically resets.
• 100 hours - CHG OIL — Oil Change Inter-
val (Every 100 hrs)
• 200 hours - SVC — Service Air Filter
(Every 200 hrs)
NOTE: The hour glass icon will flash when the
engine is running. This signifies the meter is
recording hours of operation.
Figure 2-14. Hour Meter
Remove Contents from Carton
1. Open carton completely by cutting each
corner from top to bottom.
2. Remove and verify carton contents prior to
assembly. Carton contents should contain
the following:
TABLE 3. Accessories
3. Call Generac Customer Service at 1-888-
GENERAC (1-888-436-3722) with the unit
model and serial number for any missing
carton contents.
4. Record model, serial number, and date of
purchase on front cover of this manual.
Assembly
Call Generac Customer Service at 1-888-
GENERAC (1-888-436-3722) for any assem-
bly issues or concerns. Please have model
and serial number available.
The following tools are required to install the
accessory kit.
• Needle nose pliers
• Ratchet
• 12mm socket
• 12mm wrench
004466
0000.0
000205
Item - All Models Qty.
Main Unit 1
Owner’s Manual 1
Product Registration Card 3
Item - Models GP2800 and GP3300 Only
Wheel (A) 2
Axle (B) 2
Frame Foot (C) 2
Handle Assembly (D) 1
Hardware Bag Qty.
Handle Bracket (E) 1
Cotter Pin (F) 2
M8-1.25 Hex Flange Nut (G) 5
M8-1.25 x 40 Hex Head Bolt (H) 2
M8-1.25 x 45 Hex Head Bolt (J) 4
M8-1.25 x 55 Hex Head Bolt (K) 1
Washers (L) 2
(000100a)
WARNING
Consult Manual. Read and understand manual
completely before using product. Failure to
completely understand manual and product
could result in death or serious injury.

10 Owner’s Manual for Portable Generator
NOTE: The wheels are not intended for over-
the-road use.
Install wheels as follows. See Figure 2-15.
1. Slide axle pin (B) through the wheel (A),
wheel bracket on frame, and flat washer
(L).
2. Insert cotter pin (F). Bend tabs (of cotter
pins) outward to lock into place.
Install frame foot as shown in Figure 2-15.
1. Place frame foot assembly (C) under
frame. Secure with M8-1.25 x 45 bolts (J)
and M8-1.25 hex flange nut (G).
.
Figure 2-15. Wheel & Frame Foot Assembly
Install handle as shown in Figure 2-16.
1. Install handle bracket (E) to frame with
M8-1.25 x 40 bolts (H).
2. Slide M8-1.25 x 55 bolts (K) through han-
dle bracket and handle (D). Install M8-1.25
hex flange nut (G).
.
Figure 2-16. Handle Assembly
Add Engine Oil
1. Place generator on a level surface.
2. Clean area around oil fill.
3. Remove oil fill cap and wipe dipstick clean.
See Figure 2-17.
Figure 2-17. Remove Dipstick
4. Add recommended engine oil. Climate
determines proper engine oil viscosity.
See chart to select correct viscosity.
NOTE: Use petroleum based oil (supplied) for
engine break-in before using synthetic oil.
.
NOTE: Some units have more than one oil fill
location. It is only necessary to use one oil fill
point.
5. Thread dipstick into oil filler neck. Oil level
is checked with dipstick fully installed.
6. See Figure 2-18. Remove dipstick and ver-
ify oil level is within safe operating range.
Figure 2-18. Safe Operating Range
7. Install oil fill cap/dipstick and hand-tighten.
000902
A
J
C
F
G
B
L
000903
E
D
HK
G
(000135)
CAUTION
Engine damage. Verify proper type and quantity of
engine oil prior to starting engine. Failure to do so
could result in engine damage.
000115
SAE 30
10W-30
Synthetic 5W-30
000399
000116

Owner’s Manual for Portable Generator 11
Fuel
Fuel requirements are as follows:
• Clean, fresh, unleaded gasoline.
• Minimum rating of 87 octane/87 AKI (91
RON).
• Up to 10% ethanol (gasohol) is acceptable
(where available; non-ethanol-premium fuel
is recommended).
• DO NOT use E85.
• DO NOT use a gas oil mix.
• DO NOT modify engine to run on alternate
fuels. Stabilize fuel prior to storage.
1. Verify unit is OFF and cooled for a mini-
mum of two minutes prior to fueling.
2. Place unit on level ground in a well venti-
lated area.
3. Clean area around fuel cap and remove
cap slowly.
4. Slowly add recommended fuel (A). Do not
overfill (B). See Figure 2-19.
5. Install fuel cap.
Figure 2-19. Add Recommended Fuel
NOTE: Allow spilled fuel to evaporate before
starting unit.
IMPORTANT NOTE: It is important to pre-
vent gum deposits from forming in fuel
system parts such as the carburetor, fuel
hose or tank during storage. Alcohol-
blended fuels (called gasohol, ethanol or
methanol) can attract moisture, which
leads to separation and formation of acids
during storage. Acidic gas can damage the
fuel system of an engine while in storage.
To avoid engine problems, the fuel system
should be emptied before storage of 30
days or longer. See the Storage section.
Never use engine or carburetor cleaner
products in the fuel tank as permanent
damage may occur.
(000105)
DANGER
Explosion and Fire. Fuel and vapors are
extremely flammable and explosive. Add fuel
in a well ventilated area. Keep fire and spark
away. Failure to do so will result in death
or serious injury.
(000166)
DANGER
Do not overfill fuel tank. Fill to 1/2 in. of top of tank to
allow for fuel expansion. Overfilling may cause fuel to
spill onto engine causing fire or explosion, which will
result in death or serious injury.
000400
A
B

12 Owner’s Manual for Portable Generator
Section 3 Operation
Operation and Use Questions
Call Generac Customer Service at 1-888-
GENERAC (1-888-436-3722) with questions
or concerns about equipment operation and
maintenance.
Before Starting Engine
1. Verify engine oil level is correct.
2. Verify fuel level is correct.
3. Verify unit is secure on level ground, with
proper clearance and is outdoors in a well
ventilated area.
Prepare Generator for Use
Grounding the Generator When
Used as a Portable
The generator is equipped with an equipment
ground connecting the generator frame and
the ground terminals on the AC output recep-
tacles (see NEC 250.34 (A). This allows the
generator to be used as a portable without
grounding the frame of the generator as spec-
ified in NEC 250.34. See Figure 3-1.
Figure 3-1. Grounding the Generator
Special Requirements
Review all Federal or State Occupational
Safety and Health Administration (OSHA) reg-
ulations, local codes, or ordinances that apply
to the intended use of the generator.
Consult a qualified electrician, electrical
inspector, or the local agency having jurisdic-
tion:
• In some areas, generators are required to
be registered with local utility companies.
• If the generator is used at a construction
site, there may be additional regulations
which must be observed.
Connecting the Generator to a
Building Electrical System
When connecting directly to a building electri-
cal system, it is recommended that a manual
transfer switch be used. Connections for a
portable generator to a building electrical sys-
tem must be made by a qualified electrician
and in strict compliance with all national and
local electrical codes and laws.
Connecting Electrical Loads
Let engine stabilize and warm up for a few
minutes after starting.
Plug in and turn on the desired electrical
loads.
Add up the rated watts (or amps) of all loads
to be connected at one time. This total should
not be greater than (a) the rated wattage/
amperage capacity of the generator or (b) cir-
cuit breaker rating of the receptacle supplying
the power. See Know Generator Limits.
Asphyxiation. Running engines produce
carbon monoxide, a colorless, odorless,
poisonous gas. Carbon monoxide, if not
avoided, will result in death or serious injury.
(000103)
DANGER
(000179a)
DANGER
The exhaust system must be properly maintained. Do
not alter or modify the exhaust system as to render it
unsafe or make it noncompliant with local codes and/or
standards. Failure to do so will result in death
or serious injury.
WARNING
(000118a)
Risk of fire. Do not use generator without
spark arrestor installed. Failure to do so
could result in death or serious injury.
(000178a)
Asphyxiation. Always use a battery operated carbon
monoxide alarm indoors and installed according to
the manufacturer’s instructions. Failure to do so
could result in death or serious injury.
WARNING
(000110)
WARNING
Risk of Fire. Hot surfaces could ignite
combustibles, resulting in fire. Fire could
result in death or serious injury.
(000108)
WARNING
Hot Surfaces. When operating machine, do not
touch hot surfaces. Keep machine away from
combustibles during use. Hot surfaces could
result in severe burns or fire.
(000136)
CAUTION
Equipment and property damage. Disconnect electrical
loads prior to starting or stopping unit. Failure to do so
could result in equipment and property damage.
NEUTRAL BONDED TO FRAME
NEUTRO UNIDO A LA ESTRUCTURA
NEUTRE MIS A’LA MASSE A’LA CARCASSE DU MOTEUR
004467

Owner’s Manual for Portable Generator 13
Know Generator Limits
Overloading a generator can result in damage
to the generator and connected electrical
devices. Observe the following to prevent
overload:
• Add up the total wattage of all electrical
devices to be connected at one time. This
total should NOT be greater than the gener-
ator's wattage capacity.
• The rated wattage of lights can be taken
from light bulbs. The rated wattage of tools,
appliances, and motors can be found on a
data label or decal affixed to the device.
• If the appliance, tool, or motor does not
give wattage, multiply volts times ampere
rating to determine watts (volts x amps =
watts).
• Some electric motors, such as induction
types, require about three times more watts
of power for starting than for running. This
surge of power lasts only a few seconds
when starting such motors. Make sure to
allow for high starting wattage when select-
ing electrical devices to connect to the gen-
erator:
1. Figure the watts needed to start the largest
motor.
2. Add to that figure the running watts of all
other connected loads.
The Wattage Reference Guide is provided to
assist in determining how many items the gen-
erator can operate at one time.
NOTE: All figures are approximate. See data
label on appliance for wattage requirements.
Table 3. Wattage Reference Guide
Transporting/Tipping of the Unit
Do not store or transport the unit at an angle
greater than 15 degrees.
Device Running
Watts
*Air Conditioner (12,000 Btu) 1700
*Air Conditioner (24,000 Btu) 3800
*Air Conditioner (40,000 Btu) 6000
Battery Charger (20 Amp) 500
Belt Sander (3") 1000
Chain Saw 1200
Circular Saw (6-1/2") 800 to 1000
*Clothes Dryer (Electric) 5750
*Clothes Dryer (Gas) 700
*Clothes Washer 1150
Coffee Maker 1750
*Compressor (1 HP) 2000
*Compressor (3/4 HP) 1800
*Compressor (1/2 HP) 1400
Curling Iron 700
*Dehumidifier 650
Disc Sander (9") 1200
Edge Trimmer 500
Electric Blanket 400
Electric Nail Gun 1200
Electric Range (per element) 1500
Electric Skillet 1250
*Freezer 700
*Furnace Fan (3/5 HP) 875
*Garage Door Opener 500 to 750
Hair Dryer 1200
Hand Drill 250 to 1100
Hedge Trimmer 450
Impact Wrench 500
Iron 1200
*Jet Pump 800
Lawn Mower 1200
Light Bulb 100
Microwave Oven 700 to 1000
*Milk Cooler 1100
Oil Burner on Furnace 300
Oil Fired Space Heater (140,000
Btu)
400
Oil Fired Space Heater (85,000 Btu) 225
Oil Fired Space Heater (30,000 Btu) 150
*Paint Sprayer, Airless (1/3 HP) 600
Paint Sprayer, Airless (hand-held) 150
Radio 50 to 200
*Refrigerator 700
Slow Cooker 200
*Submersible Pump (1-1/2 HP) 2800
*Submersible Pump (1 HP) 2000
*Submersible Pump (1/2 HP) 1500
*Sump Pump 800 to 1050
*Table Saw (10") 1750 to 2000
Television 200 to 500
Toaster 1000 to 1650
Weed Trimmer 500
* Allow 3 times the listed watts for starting these
devices.

14 Owner’s Manual for Portable Generator
Starting Pull Start Engines
1. Unplug all electrical loads from the unit's
receptacles before starting engine.
2. Place generator on a level surface.
3. Open the fuel shut-off valve (A). See Fig-
ure 3-2.
4. Turn engine RUN/STOP switch (B) to
RUN. See Figure 3-2.
.
Figure 3-2. Engine Controls
5. Slide engine choke (C) to Full CHOKE
position (left). See Figure 3-3.
NOTE: GP1000 and GP1100 Choke Lever
positions are in reverse order.
Figure 3-3. Choke Position
6. See Figure 3-2. Firmly grasp recoil handle
(D) and pull slowly until increased resis-
tance is felt. Pull rapidly up and away.
7. When engine starts, move choke knob to
1/2 CHOKE position until engine runs
smoothly, then fully into RUN position. If
engine falters, move choke back to 1/2-
CHOKE position until engine runs
smoothly, then to RUN position.
NOTE: If engine fires, but does not continue to
run, move choke lever to Full CHOKE and
repeat starting instructions.
IMPORTANT NOTE: Do not overload gener-
ator or individual panel receptacles. These
outlets are overload protected with push-
to-reset circuit breakers. If amperage rat-
ing of any circuit breaker is exceeded, that
breaker opens and electrical output to that
receptacle is lost. Read Know Generator
Limits carefully.
Generator Shut Down
1. Shut off all loads and unplug electrical
loads from generator panel receptacles.
2. Let engine run at no-load for several min-
utes to stabilize internal temperatures of
engine and generator.
3. Move RUN/STOP switch to STOP.
4. Close fuel valve.
NOTE: Under normal conditions, close fuel
valve and allow generator to run carburetor
bowl out of fuel. For emergencies, switch to
STOP.
Low Oil Level Shutdown System
The engine is equipped with a low oil level
sensor that shuts down the engine automati-
cally when the oil level drops below a speci-
fied level. The engine will not run until the oil
has been filled to the proper level.
If the engine shuts down and there is sufficient
fuel, check engine oil level.
(000183)
WARNING
Recoil Hazard. Recoil could retract unexpectedly.
Kickback could result in death or serious injury.
(000136)
CAUTION
Equipment and property damage. Disconnect electrical
loads prior to starting or stopping unit. Failure to do so
could result in equipment and property damage.
004452
A
B
D
000209
C
(000136)
CAUTION
Equipment and property damage. Disconnect electrical
loads prior to starting or stopping unit. Failure to do so
could result in equipment and property damage.

Owner’s Manual for Portable Generator 15
Section 4 Maintenance and Troubleshooting
Maintenance
Regular maintenance will improve perfor-
mance and extend engine/equipment life.
Generac Power Systems, Inc. recommends
that all maintenance work be performed by an
Independent Authorized Service Dealer
(IASD). Regular maintenance, replacement,
or repair of the emissions control devices and
systems may be performed by any repair shop
or person of the owner’s choosing. To obtain
emissions control warranty service free of
charge, the work must be performed by an
IASD. See the emissions warranty.
NOTE: Call 1-888-GENERAC (1-888-436-
3722) with questions about component
replacement.
Maintenance Schedule
Follow maintenance schedule intervals,
whichever occurs first according to use.
NOTE: Adverse conditions will require more
frequent service.
NOTE: Go to Generac.com or contact an
IASD for replacement parts.
NOTE: All required service and adjustments
should be each season as detailed in the fol-
lowing chart.
Preventive Maintenance
Dirt or debris can cause improper operation
and equipment damage. Clean generator
daily or before each use. Keep area around
and behind muffler free from combustible
debris. Inspect all cooling air openings on
generator.
• Use a damp cloth to wipe exterior surfaces
clean.
• Use a soft bristle brush to loosen caked on
dirt, oil, etc.
• Use a vacuum to pick up loose dirt and
debris.
• Low pressure air (not to exceed 25 psi)
may be used to blow away dirt. Inspect
cooling air slots and openings on generator.
These openings must be kept clean and
unobstructed.
NOTE: DO NOT use a garden hose to clean
generator. Water can enter engine fuel system
and cause problems. If water enters generator
through cooling air slots, some water will be
retained in voids and crevices of rotor and sta-
tor winding insulation. Water and dirt buildup
on generator internal windings will decrease
insulation resistance of windings.
Engine Maintenance
Engine Oil Recommendations
To maintain the product warranty, the engine
oil should be serviced in accordance with the
recommendations of this manual. For your
convenience, maintenance kits designed and
intended for use on this product are available
from the manufacturer that include engine oil,
oil filter, air filter, spark plug(s), a shop towel
and funnel. These kits can be obtained from
an Independent Authorized Service Dealer
(IASD).
At Each Use
Check engine oil level
Every 25 Hours
Clean air filter**
Every 50 Hours
Change engine oil*
Clean/gap spark plug
Every 100 Hours or Every Season*
Replace air filter**
Replace spark plug
Check/adjust valve clearance***
* Change oil after first 20 hours of operation,
then every season. Change oil and oil filter
every month when operating under heavy
load or in high temperatures.
** Clean more often under dirty or dusty oper-
ating conditions. Replace air filter parts if
they cannot be adequately cleaned.
*** Check valve clearance and adjust if neces-
sary after first 50 hours of operation and
every 100 hours thereafter.
(000142)
Do not insert any object through the air cooling slots.
Generator can start at any time and could result in
death, serious injury, and unit damage.
WARNING
(000141)
WARNING
Accidental start-up. Disconnect spark plug wires when
working on unit. Failure to do so could result in death
or serious injury.

16 Owner’s Manual for Portable Generator
.
Inspect Engine Oil Level
Inspect engine oil level prior to each use, or
every 8 hours of operation.
1. Place generator on a level surface.
2. Clean area around oil fill.
3. See Figure 4-1. Remove oil fill cap and
wipe dipstick clean.
Figure 4-1. Engine Oil Fill
4. Screw dipstick into filler neck. Remove
dipstick and verify oil level is within safe
operating range. See Figure 4-2.
Figure 4-2. Safe Operating Range
5. Add recommended engine oil as neces-
sary.
6. Replace oil fill cap and hand-tighten.
NOTE: Some units have more than one oil fill
location. It is only necessary to use one oil fill
point.
Change Engine Oil
When using generator under extreme, dirty,
dusty conditions, or in extremely hot weather,
change oil more frequently.
NOTE: Don’t pollute. Conserve resources.
Return used oil to collection centers.
Change oil while engine is still warm from run-
ning, as follows:
1. Place generator on a level surface.
2. Disconnect the spark plug wire from the
spark plug and place the wire where it
cannot contact spark plug.
3. Clean area around oil fill, and oil drain
plug.
4. Remove oil fill cap.
5. Remove oil drain plug and drain oil com-
pletely into a suitable container.
6. Install oil drain plug and tighten securely.
7. Slowly pour oil into oil fill opening until oil
level is between L and H marks on dip-
stick. DO NOT overfill.
8. Install oil fill cap, and finger tighten.
9. Wipe up any spilled oil.
10. Properly dispose of oil in accordance with
all applicable regulations.
Air Filter
Engine will not run properly and may be dam-
aged if run with a dirty air filter. Service air fil-
ter more frequently in dirty or dusty conditions.
To service air filter:
1. See Figure 4-3. Turn knob (A) and remove
air filter cover (B).
2. Wash in soapy water. Squeeze filter (C)
dry in clean cloth (DO NOT TWIST).
3. Clean air filter cover before re-installing it.
NOTE: To order a new air filter, contact the
nearest authorized service center at 1-888-
GENERAC (1-888-436-3722).
Figure 4-3. Air Filter Assembly
SAE 30
10W-30
Synthetic 5W-30
000399
(000139)
WARNING
Risk of burns. Allow engine to cool before
draining oil or coolant. Failure to do so could
result in death or serious injury.
000115
000116
(000141)
WARNING
Accidental start-up. Disconnect spark plug wires when
working on unit. Failure to do so could result in death
or serious injury.
000630
A
B
C

Owner’s Manual for Portable Generator 17
Service Spark Plug
To service spark plug:
1. Clean area around spark plug.
2. Remove and inspect spark plug.
3. Inspect electrode gap with wire feeler
gauge and reset spark plug gap to 0.028 -
0.031 in (0.70 - 0.80 mm). See Figure 4-4.
Figure 4-4. Spark Plug
NOTE: Replace spark plug if electrodes are
pitted, burned or porcelain is cracked. Use
ONLY recommended replacement plug. See
Specifications.
4. Install spark plug finger tight, and tighten
an additional 3/8 to 1/2 turn using spark
plug wrench.
Inspect Muffler and Spark
Arrester
NOTE: It is a violation of California Public
Resource Code, Section 4442, to use or oper-
ate the engine on any forest-covered, brush-
covered, or grass-covered land unless the
exhaust system is equipped with a spark
arrester, as defined in Section 4442, main-
tained in effective working order. Other states
or federal jurisdictions may have similar laws.
Contact original equipment manufacturer,
retailer, or dealer to obtain a spark arrester
designed for exhaust system installed on this
engine.
NOTE: Use ONLY original equipment replace-
ment parts.
Inspect muffler for cracks, corrosion, or other
damage. Remove spark arrester, if equipped,
inspect for damage or carbon blockage.
Replace parts as required.
Valve Clearance
IMPORTANT NOTE: If uncomfortable about
performing this procedure, or the proper
tools are not available, take generator to
the nearest service center to have valve
clearance adjusted.
Check valve clearance after the first fifty-hours
of operation. Adjust as necessary.
• Intake — 0.004 ± 0.0008 inch (0.10 ± 0.02
mm)
• Exhaust — 0.006 ± 0.0008 inch (0.15 ±
0.02 mm)
Storage
General
It is recommended to start and run the genera-
tor for 30 minutes, every 30 days. If this is not
possible, refer to the following list to prepare
unit for storage.
• DO NOT place a storage cover on a hot
generator. Allow unit to cool to room tem-
perature before storage.
• DO NOT store fuel from one season to
another unless properly treated.
• Replace fuel container if rust is present.
Rust in fuel will cause fuel system prob-
lems.
• Cover unit with a suitable protective, mois-
ture resistant cover.
• Store unit in a clean and dry area.
• Always store generator and fuel away from
heat and ignition sources.
Prepare Fuel System for Storage
Fuel stored over 30 days can go bad and
damage fuel system components. Keep fuel
fresh, use fuel stabilizer.
If fuel stabilizer is added to fuel system, pre-
pare and run engine for long term storage.
Run engine for 10-15 minutes to circulate sta-
bilizer throughout fuel system. Adequately
prepared fuel can be stored up to 24 months.
NOTE: If fuel has not been treated with fuel
stabilizer, it must be drained into an approved
container. Run engine until it stops from lack
of fuel. Use of fuel stabilizer in fuel storage
container is recommended to keep fuel fresh.
1. Change engine oil.
2. Remove spark plug.
3. Pour tablespoon (5-10cc) of clean engine
oil or spray a suitable fogging agent into
cylinder.
4. Pull starter recoil several times to distrib-
ute oil in cylinder.
5. Install spark plug.
000211
(000143)
DANGER
Explosion and Fire. Fuel and vapors are extremely
flammable and explosive. Store fuel in a well
ventilated area. Keep fire and spark away. Failure
to do so will result in death or serious injury.
(000109)
WARNING
Risk of Fire. Verify machine has properly
cooled before installing cover and storing
machine. Hot surfaces could result in fire.
(000181)
WARNING
Vision Loss. Eye protection is required to avoid
spray from spark plug hole when cranking engine.
Failure to do so could result in vision loss.

18 Owner’s Manual for Portable Generator
6. Pull recoil slowly until resistance is felt.
This will close valves so moisture cannot
enter engine cylinder. Gently release
recoil.
Change Oil
Change engine oil before storage. See
Change Engine Oil.
Troubleshooting
PROBLEM CAUSE CORRECTION
Engine is running, but
AC output is not
available.
1. Circuit breaker OPEN.
2. Poor connection or defective
cord set.
3. Connected device is bad.
4. Fault in generator.
1. Reset circuit breaker.
2. Check and repair.
3. Connect another device that is
in good condition.
4. Contact IASD.
Engine runs well at
no-load, but bogs when
load is applied.
1. Short circuit in a connected
load.
2. Generator is overloaded.
3. Engine speed is too slow.
4. Shorted generator circuit.
5. Dirty fuel filter.
6. Clogged spark arrestor.
1. Disconnect shorted electrical
load.
2. See Know Generator Limits.
3. Contact IASD.
4. Contact IASD.
5. Replace fuel filter.
6. Clean spark arrestor screen.
Engine will not start; or
starts and runs rough.
1. Fuel shut-off is OFF.
2. Dirty air filter.
3. Out of fuel.
4. Stale fuel.
5. Spark plug wire not connected
to spark plug.
6. Bad spark plug.
7. Water in fuel.
8. Overchoking.
9. Low oil level.
10. Excessive rich fuel mixture.
11. Intake valve stuck open or
closed.
12. Engine lost compression.
13. Dirty fuel filter.
1. Turn fuel shut-off ON.
2. Clean or replace air filter.
3. Fill fuel tank.
4. Drain fuel tank and fill with
fresh fuel.
5. Connect wire to spark plug.
6. Replace spark plug.
7. Drain fuel tank; fill with fresh
fuel.
8. Set choke to no choke posi-
tion.
9. Fill crankcase to correct level.
10. Contact IASD.
11. Contact IASD.
12. Contact IASD.
13. Replace fuel filter.
Engine shuts down
during operation.
1. Out of fuel.
2. Low oil level.
3. Fault in engine.
1. Fill fuel tank.
2. Fill crankcase to correct level.
3. Contact IASD.
Engine lacks power. 1. Load is too high.
2. Dirty air filter.
3. Engine needs to be serviced.
4. Dirty fuel filter.
5. Clogged spark arrestor.
1. Reduce load (see Know Gen-
erator Limits).
2. Clean or replace air filter.
3. Contact IASD.
4. Replace fuel filter.
5. Clean spark arrestor screen.
Engine surges or
stumbles.
1. Choke is opened too soon.
2. Carburetor is running too rich
or too lean.
1. Set choke to halfway position
until engine runs smoothly.
2. Contact IASD.