Page 1
Operator Manual
Portable Generator Set
EGMBB, P2220c
EGMBB, P2400c
EGMBG, P2927c
EGMBG, P2927c
EGMBG, P3027c
EGMBG, P3500c
English 2−2009 914−0102 (Issue 3)
Page 2
Page 3
Table of Contents
1. SAFETY PRECAUTIONS ............................................................................................................... 1
1.1 Exhaust Gas Is Deadly ............................................................................................................ 1
1.2 Gasoline is Flammable / Explosive .......................................................................................... 1
1.3 Generator Voltage is Deadly .................................................................................................... 2
1.4 Moving Parts Can Cause Severe Personal Injury or Death .................................................... 2
1.5 Battery Gases Are Explosive ................................................................................................... 2
1.6 General Precautions ................................................................................................................ 2
2. INTRODUCTION ............................................................................................................................. 5
2.1 About This Manual ................................................................................................................... 5
2.2 Model Identification .................................................................................................................. 5
2.3 How to Obtain Service ............................................................................................................. 9
2.4 Wheel Kit .................................................................................................................................. 9
2.5 Fuel Requirements ................................................................................................................. 10
2.6 Generator Set Assembly Instructions .................................................................................... 11
2.7 Wheel Kit Assembly Instructions ........................................................................................... 11
2.8 Engine Oil Recommendations ............................................................................................... 12
3. STARTING AND RUNNING THE GENERATOR SET .................................................................. 13
3.1 Control Panel ......................................................................................................................... 13
3.2 Pre-Start Checks .................................................................................................................... 18
3.3 Starting the Generator Set ..................................................................................................... 20
3.4 Stopping the Generator Set ................................................................................................... 22
3.5 Powering Tools and Appliances ............................................................................................ 22
3.6 Charging Batteries ................................................................................................................. 24
3.7 Circuit Breakers ..................................................................................................................... 24
3.8 Grounding .............................................................................................................................. 24
3.9 Low Oil Shutdown .................................................................................................................. 25
3.10 Electrical Interference with Communications or Appliances ................................................ 25
3.11 Exercising the Generator Set ............................................................................................... 25
3.12 Engine Break-In ................................................................................................................... 25
3.13 Out-of-Service Protection ..................................................................................................... 25
4. MAINTENANCE ............................................................................................................................ 27
4.1 Maintenance Schedule .......................................................................................................... 27
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Table of Contents 2-2009
4.2 General Inspections ............................................................................................................... 28
4.3 Changing Engine Oil .............................................................................................................. 28
4.4 Air Filter Maintenance ............................................................................................................ 29
4.5 Fuel Sediment Cup Cleaning ................................................................................................. 30
4.6 Spark Plug Maintenance ........................................................................................................ 30
4.7 Cleaning the Generator Set ................................................................................................... 32
4.8 Cleaning the Spark Arrester .................................................................................................. 32
5. TROUBLESHOOTING .................................................................................................................. 35
6. SPECIFICATIONS ........................................................................................................................ 39
7. IMPORTANT INFORMATION FOR CALIFORNIA USERS .......................................................... 43
8. MAINTENANCE RECORD ............................................................................................................ 45
ii 914-0102 (Issue 3)
Page 5
1 Safety Precautions
Thoroughly read the Operator Manual before operating the generator set. Safe operation
and top performance can only be obtained when equipment is operated and maintained
properly.
The following symbols, found throughout this manual, alert you to potentially dangerous
conditions to operators, service personnel, and the equipment.
DANGER: This symbol alerts you to an immediate hazard that will result in
severe personal injury or death.
WARNING: This symbol alerts you to a hazard or unsafe practice that can result in
severe personal injury or death.
CAUTION: This symbol alerts you to a hazard or unsafe practice that can result in personal
injury or damage to equipment or property.
1.1 Exhaust Gas Is Deadly
· Operate the generator set outdoors only. Stay away from the exhaust outlet.
· Make sure generator set exhaust will not enter windows, doors, vents, or air intakes of
adjacent buildings, vehicles, or boats.
· NEVER USE THE GENERATOR SET INSIDE a home, garage, crawl space, barn, shed,
cabin, boat, boat house, RV, or tent; or in a confined outdoor space such as an alley, ditch,
parking garage, or courtyard; or in any other space where exhaust can accumulate. Note
that HAZARDOUS CARBON MONOXIDE LEVELS FROM ENGINE EXHAUST CAN
ACCUMULATE INDOORS, EVEN WHEN ALL WINDOWS AND DOORS ARE OPEN AND
FANS ARE RUNNING.
· Even when you use a generator set correctly, CO may leak into the home. ALWAYS use a
battery-powered or battery-backup CO alarm in the home.
· If you feel sick, dizzy, or weak after the generator set has been running, move to fresh air
RIGHT AWAY. See a doctor. You could have carbon monoxide poisoning.
1.2 Gasoline is Flammable / Explosive
· Refuel the generator set outdoors only.
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1. Safety Precautions 2-2009
· Static electric sparks caused by fuel flowing through a service station pump nozzle can
ignite gasoline. Never fill the generator set with a service station pump nozzle. Instead, fill
a safety tank sitting on the ground and then slowly transfer fuel to the generator set from
the safety tank.
· DO NOT fill fuel tanks while the engine is running. A hot engine can ignite the fuel.
· To prevent fire due to fuel leakage, always close the fuel valve and let the generator set
cool before transporting it or storing it in a confined space.
· DO NOT SMOKE OR ALLOW AN OPEN FLAME near the generator set. Keep flames,
sparks, electrical switches, pilot lights, electrical arcs, arc-producing equipment, and all
other sources of ignition well away.
1.3 Generator Voltage is Deadly
· DO NOT CONNECT THE GENERATOR SET DIRECTLY TO ANY BUILDING
ELECTRICAL SYSTEM. Back-feed could cause electrocution of utility line workers and
could damage equipment. An approved switching device must be used to prevent
interconnections. A trained and experienced electrician must make electrical connections
when the generator set is used for emergency power.
· Make sure clothing, shoes, and skin are dry when handling electrical equipment.
· Never operate the generator set in rain or snow or when it is sitting on wet ground.
1.4 Moving Parts Can Cause Severe Personal Injury or Death
· Before performing any maintenance on the generator set, disconnect the spark plug wire.
· Always keep hands away from moving parts.
· Do not wear loose clothing or jewelry while servicing the generator set. Loose clothing and
jewelry can become caught in moving parts. Jewelry can short out electrical contacts
causing sparks, flame, and electrical shock.
· Make sure that fasteners and clamps on the generator set are tight. Keep guards in
position over fans, rotors, etc.
1.5 Battery Gases Are Explosive
· Wear safety glasses when servicing batteries.
· Do not smoke.
· To reduce arcing when disconnecting or reconnecting battery cables, always disconnect
the negative ( – ) cable of the battery first and reconnect it last.
1.6 General Precautions
· Keep children away from the generator set.
· Wear hearing protection when near an operating generator set.
2 914-0102 (Issue 3)
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2-2009 1. Safety Precautions
· Keep a multi-class ABC fire extinguisher readily at hand. Class A fires involve ordinary
combustible materials, such as wood and cloth. Class B fires involve combustible and
flammable liquids and gaseous fuels. Class C fires involve live electrical equipment. (ref.
NFPA No. 10).
· Benzene and lead may be found in gasoline and have been identified by some state and
federal agencies as causing cancer or reproductive toxicity. Do not ingest, inhale, or
contact gasoline.
· Used engine oils have been identified by some state and federal agencies as causing
cancer or reproductive toxicity. Do not ingest, inhale, or contact used engine oil or its
vapors.
· Keep the generator set clean and dry at all times. Excess grease and oil can catch fire
and/or accumulate dirt, which can cause overheating.
· Do not store anything on the generator set, such as oil cans, oily rags, chains or wooden
blocks. A fire could result or operation could be adversely affected.
· Do not work on the generator set when you are mentally or physically fatigued or have
consumed alcohol or drugs.
914-0102 (Issue 3) 3
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1. Safety Precautions 2-2009
This page is intentionally blank.
4 914-0102 (Issue 3)
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2 Introduction
2.1 About This Manual
This manual covers the generator sets listed on the front cover. Study this manual and observe
all of its warnings and precautions. Using and maintaining the generator set properly will result
in longer generator set life, better performance, and safer operation.
2.2 Model Identification
Be ready to provide the generator set model and serial numbers on the generator set nameplate
when contacting Cummins Onan for parts, service, or product information. The nameplate and
its location on the generator set is illustrated in the Figures below.
WARNING: Many troubleshooting procedures or replacement of parts present hazards
that can result in equipment damage and severe personal injury or death.
Only trained and experienced service personnnel with knowledge of fuels,
electricity, and machinery hazards should perform service procedures.
Review the Safety Precautions section of this manual.
FIGURE 1. NAMEPLATE LOCATION FOR P2220C, P2927, P2927C, AND P3027 GENERATOR SETS
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2. Introduction 2-2009
FIGURE 2. NAMEPLATE LOCATION FOR P2400 AND P3500
6 914-0102 (Issue 3)
Page 11
2-2009 2. Introduction
No. Description No. Description
1 Fuel Tank Cap 6 Recoil Starter Grip
2 Fuel Gauge 7 Control Panel
3 Choke Lever 8 Muffler
4 Fuel Valve 9 Spark Plug Boot
5 Air Filter
NOTE: Carb model P2927c may include additional components not shown.
FIGURE 3. EGMBG COMPONENT LOCATIONS (P2927, P2927C, P3027, AND P3500)
914-0102 (Issue 3) 7
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2. Introduction 2-2009
No. Description No. Description
1 Fuel Tank Cap 6 Recoil Starter Grip
2 Fuel Valve 7 Control Panel
3 Choke Lever 8 Muffler
4 Fuel Valve 9 Spark Plug Boot
5 Air Filter
NOTE: Carb model P2220c may include additional components not shown.
FIGURE 4. EGMBB COMPONENT LOCATIONS (P2220C AND P2400)
8 914-0102 (Issue 3)
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2-2009 2. Introduction
2.3 How to Obtain Service
When calling for service, parts, or product literature (such as the Service Manual or Parts
Catalog) for your generator set, contact the nearest authorized Cummins Onan distributor.
Cummins Onan has factory-trained representatives to handle your requests for generator set
parts and service. For information on contacting Cummins Onan distributors worldwide, go to
the internet site www.cumminsonan.com.
2.3.1 In North America
Call 1-800-888-ONAN to contact the nearest Cummins Onan distributor in the United States or
Canada. This automated service is for touch-tone phones only. Select OPTION 1 (press 1) to be
automatically connected to the distributor nearest to you.
If you are unable to contact a distributor using the automated service, consult the Yellow Pages.
Typically our distributors are listed under:
· GENERATORS - ELECTRIC
· ENGINES - GASOLINE OR DIESEL, or
· RECREATIONAL VEHICLES - EQUIPMENT, PARTS, AND SERVICE
If you have difficulty in arranging for service or resolving a problem, contact the Service
Manager at the nearest Cummins Onan distributor for assistance.
2.3.2 Outside North America
If you are outside North America, call Cummins Onan at 1-763-574-5000 from 7:30 AM to 4:00
PM, Central Standard Time, Monday through Friday, or fax 1-763-528-7229.
2.3.3 Information to Have Ready
Before calling for service, have the following information available:
1. The complete generator set model number and series number. Refer to the "Model
Identification" section of this manual.
2. The date of purchase.
3. The nature of the problem. Refer to the "Troubleshooting" section of this manual.
2.4 Wheel Kit
The assembled wheel kit shown below is optional equipment on P2220c, P2400, P2927,
P2927c, P3027, and P3500 models. A wheel kit (0541-1340) can be purchased as an
accessory.
914-0102 (Issue 3) 9
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2. Introduction 2-2009
FIGURE 5. WHEEL KIT INSTALLED
2.5 Fuel Requirements
Use clean, fresh unleaded gasoline with an octane rating (anti-knock index) of 87 or higher.
During part of the year, only mandated "oxygenated" gasoline may be available. While
"oxygenated" gasoline is acceptable for use, it is not preferable. Using leaded gasoline will
result in extra maintenance to remove combustion changer and spark plug deposits. Do not use
starting fluids and do not use gasoline or gasoline additives (de-icers) containing methanol.
Methanol is corrosive to fuel system components.
WARNING: Evaporative starting fluids, such as ether, are highly explosive which can
result in severe personal injury or death. Do not use starting fluids.
CAUTION: Methanol is corrosive to fuel system components. Do not use gasoline or gasoline
additives containing methanol.
CAUTION: Avoid using leaded gasoline because of the extra engine maintenance that will be
required.
WARNING: Gasoline is highly flammable and explosive which can result in severe
personal injury or death. Do not smoke if you smell gasoline or are near fuel
tanks or gasoline-burning equipment, or are in the area sharing ventilations
with such equipment. Keep flames, sparks, electrical switches,pilotlights,
arc-producing equipment, andallothersourcesofignitionwellawayfromthe
area.
10 914-0102 (Issue 3)
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2-2009 2. Introduction
2.6 Generator Set Assembly Instructions
1. Remove the generator set from the box.
WARNING: The generator set is heavy. Dropping the generator set can cause severe
personal injury or death. Keep feet and hands clear when lifting the generator
set.
2. If necessary, install the wheel kit (see the "Wheel Kit Assembly Instructions" below).
3. Add oil to the generator set (see "Engine Oil Recommendations" on the following page).
CAUTION: Too little oil can cause severe engine damage. Make sure that the oil level is above
the Add mark on the dipstick.
4. Add gasoline to the fuel tank (see "Fuel Requirements" on the previous page).
CAUTION: Methanol is corrosive to fuel system components. Do not use gasoline or gasoline
additives containing methanol.
CAUTION: The use of leaded gasoline will require extra maintenance. Avoid using leaded
gasoline.
2.7 Wheel Kit Assembly Instructions
CAUTION: Improper handling of the generator set can result in equipment damage. Do not
turn the generator set on the side, top, or end. Doing so may damage the
generator set or cause dangerous fuel or oil leakage. Do not place items on top of
the generator set. The wheel kit is designed to support the generator only.
Required Tools
· 10 and 12 mm wrenches, sockets, and ratchet
· Three 6-inch high blocks of wood
· Pliers
Installation Procedure
1. Install the handle assembly (handle, bracket, hinge pin, grips, end plugs, two cotter pins,
and fasteners).
a. Use two long bolts to attach the handle assembly to the frame.
b. Tighten securely; do not crush the frame tube.
2. Block up the generator set under both frame tubes as shown below. Place a block under
the center of the cross-member on the exhaust end.
3. Install the leg assembly.
a. Install a leg assembly (support leg, rubber pad, and fastener) onto each side of the
exhaust end cross-member.
b. Use two bolts and nuts for each leg and tighten securely.
4. Install the wheel and axle assembly (axle assembly and wheel assemblies).
a. Remove the rubber pads secured to the frame where the axle is attached.
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2. Introduction 2-2009
b. Remove the cotter pins and loose washers from the axle assembly (axle, two loose
washers, two cotter pins, and fasteners).
c. Install the wheels (flat free tire and wheel); make sure the long hub is to the inside.
d. Reinstall the washers and cotter pins on the axle assembly. Bend one leg of each
cotter pin.
e. Place the axle assembly under the cross member as shown and install four bolts and
nuts. Tighten securely.
No. Description No. Description
1 Frame 4 Support Leg Assembly
2 Wheel Assembly 5 Wooden Blocks
3 Axle Assembly 6 Handle Assembly
FIGURE 6. INSTALLED WHEEL KIT
2.8 Engine Oil Recommendations
Use American Petroleum Institute (API) performance class SL or SJ engine oil or better. Also
look for Society of Automotive Engineers (SAE) viscosity grade oil (see the table below).
Choose the viscosity grade appropriate for the ambient temperature expected until the next
scheduled oil change. Refer to the "Specifications" section for engine oil capacity.
Single-grade SAE 30 oil is best when temperatures are consistently above freezing. Multi-grade
oils are better when wide temperature variations are expected.
TABLE 1. OIL VISCOSITY VS. TEMPERATURE
Expected Ambient Temperatures SAE Viscosity Grade
o
30
F (0 C) and higher 30
o
10
0oF to 80
-20
F to 100
o
F to 50
o
o
F (-18
o
o
F (-12
F (-28
C to 38
o
C to 27
o
to 10
o
C) 15W-40
o
C)
o
C) 5W-30
10W-30
10W-40
12 914-0102 (Issue 3)
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3 Starting and Running the Generator
Set
3.1 Control Panel
The control panels for the models covered in this manual are illustrated below. The control
switches, meters, output receptacles, and circuit breaker reset buttons are grouped for
convenient operation.
No. Description No. Description
1 Start/On/Off Switch 4 Earth Ground Lug
2 DC Circuit Breaker Reset 5 Two 120 VAC, 20A Receptacles (GFCI)
3 AC Circuit Breaker Reset 6 12 Volt DC Terminals
FIGURE 7. P2220C CONTROL PANEL
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3. Starting and Running the Generator Set 2-2009
No. Description No. Description
1 Start/On/Off Switch 4 One 240 VAC, 30A Receptacle (L14-30R)
2 Earth Ground Lug 5 AC Circuit Breaker Reset
3 Two 120 VAC, 15A Receptacles (GFCI) 6 Two 120 VAC, 15A Receptacles
FIGURE 8. P2927 CONTROL PANEL
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2-2009 3. Starting and Running the Generator Set
No. Description No. Description
1 Start/On/Off Switch 4 One 240 VAC, 30A Receptacle (L14-30R)
2 Earth Ground Lug 5 AC Circuit Breaker Reset
3 Two 120 VAC, 15A Receptacles (GFCI) 6 Two 120 VAC, 15A Receptacles
FIGURE 9. P2927C CONTROL PANEL
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3. Starting and Running the Generator Set 2-2009
No. Description No. Description
1 Start/On/Off Switch 6 Earth Ground Lug
2 DC Circuit Breaker Reset 7 AC Circuit Breaker Reset
3 Two 120 VAC, 20A Receptacles (GFCI) 8 120 VAC or 120/240 VAC Selector Switch
4 AC Voltmeter 9 AC Circuit Breaker Reset
5 One 240 VAC, 30A Receptacle (L14-30R) 10 12 Volt DC Terminals
FIGURE 10. P3027 CONTROL PANEL
16 914-0102 (Issue 3)
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2-2009 3. Starting and Running the Generator Set
No. Description No. Description
1 Start/On/Off Switch 5 Earth Ground Lug
2 DC Circuit Breaker Reset 6 Two 120 VAC, 20A Receptacles (GFCI)
3 AC Circuit Breaker Reset 7 12 Volt DC Terminals
4 AC Voltmeter
FIGURE 11. P2400 CONTROL PANEL
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3. Starting and Running the Generator Set 2-2009
No. Description No. Description
1 Start/On/Off Switch 6 Earth Ground Lug
2 DC Circuit Breaker Reset 7 AC Circuit Breaker Reset
3 AC Circuit Breaker Reset 8 120 VAC or 120/240 VAC Selector Switch
4 AC Voltmeter 9 Two 120 VAC, 20A Receptacles (GFCI)
5 One 120/240 VAC 30A Receptacle (L14-30R) 10 12 Volt DC Terminals
FIGURE 12. P3500 CONTROL PANEL
3.2 Pre-Start Checks
DANGER: EXHAUST GAS IS DEADLY! THE INDOOR USE OF A GENERATOR SET
CAN KILL QUICKLY.
Exhaust gases contain carbon monoxide, an odorless and colorless gas. Carbon
monoxide is poisonous and can cause unconsciousness, severe personal injury, and
death. Symptoms of carbon monoxide poisoning include:
· Dizziness
· Nausea
· Headache
· Weakness and sleepiness
· Throbbing in temples
· Muscular twitching
· Vomiting
· Inability to think coherently
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2-2009 3. Starting and Running the Generator Set
IF YOU OR ANYONE ELSE EXPERIENCE ANY OF THESE SYMPTOMS, GET INTO FRESH
AIR IMMEDIATELY. Then:
· Seek immediate advice from poison control, medical center, or 911. Be aware that:
· CO symptoms can be mistaken for flu, dehydration, food poisoning, or other illness.
· Injury or death can occur later when in fresh air and apparently recovering.
· Call the fire department to determine when it is safe to re-enter the area.
Operate the generator set OUTDOORS only. Stay away from and upwind of the exhaust
outlet.
Make sure the exhaust will not enter windows, doors, vents, or air intakes of adjacent
buildings, vehicles, or boats.
Never use the generator set inside a home, garage, crawl space, barn, shed, cabin, boat,
boat house, RV, or tent; or in a confined outdoor space such as an alley, ditch, parking
garage, or courtyard; or in any other space where exhaust can accumulate. Hazardous
carbon monoxide levels from generator set exhaust can accumulate indoors even when
windows and doors are open and fans are running.
Even when you use a generator set correctly, CO may leak into the home. ALWAYS use a
battery-powered or battery-backup CO alarm in the home.
If you feel sick, dizzy, or weak after the generator set has been running, move to fresh air
RIGHT AWAY. See a doctor. You could have carbon monoxide poisoning.
Before the first start of the day and after every eight hours of operation, perform GENERAL
INSPECTIONS and any scheduled maintenance due, as indicated in the "Periodic Maintenance
Schedule." If the generator set has been in storage, return it to service as instructed in the
"Out-of-Service Protection" section.
WARNING: Moving parts can cause severe personal injury or death. Hot exhaust parts
can cause severe burns. Make sure all protective guards are properly in
place before starting the generator set.
WARNING: A non-functioning GFCI, or a damaged or overloaded extension cord, can
cause electrocution or fire. Test the GFCI for proper operation. Make sure all
extension cords are in good condition, are rated for outdoor use, have the
proper plugs, and have the proper amp and voltage ratings.
WARNING: Gasoline is highly flammable and explosive and can be ignited by static
electric sparks caused by fuel flowing through a service station pump nozzle
which can result in severe personal injury or death. Never fill the generator
set with a service station pump nozzle. Instead, fill a safety tank sitting on
the ground and then slowly transfer fuel to the generator set from the safety
tank.
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3. Starting and Running the Generator Set 2-2009
1. Locate the generator set outdoors in a dry, level place and chock the wheels, if so
equipped.
2. Check fuel and oil levels, and fill as necessary.
WARNING: If the generator neutral supply is not grounded to earth, the user may be left
without ground fault protection, which could result in serious personal injury
or death. Always make sure the generator neutral supply is grounded to
earth before operating the generator set.
3. Connect the grounding lug to earth ground in accordance with the local electrical code.
4. Test the GFCI for proper operation.
5. Make sure that all extension cords are in good condition, are rated for outdoor use and
have the proper amp and voltage ratings, and that they are equipped with proper plugs
having grounding blades.
6. Make sure all tools and appliances have been turned off or are disconnected.
3.3 Starting the Generator Set
WARNING: Operating a generator set in an inappropriate environment can result in a fire
which can result in severe personal injury or death. Do not operate the
generator set in hazardous environments where it could ignite flammable
gasses or combustible materials. To avoid the risk of electrocution, never
operate the generator set in rain or snow or when it is sitting on wet ground.
Be careful not to touch or allow any combustible materials to touch the
muffler which can get very hot.
CAUTION: The voltage surge at startup can damage appliances such as TVs, microwave
ovens, computers, etc. Be sure to disconnect all appliances before starting the
generator set.
1. Open the fuel valve (see Figure 13 ).
2. Pull the choke rod out to close the choke if the engine is cold (see Figure 14 ).
3. Verify that the On/Off switch is in the ON position.
4. With one hand on the generator, grip the recoil handle with the other hand and pull it out
quickly and smoothly. Repeat as necessary until the engine starts (see Figure 15 ).
5. As the engine warms up, gradually push the choke rod in.
6. Let the engine warm up for a few minutes before connecting tools or appliances. See
"Power Tools and Appliances."
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2-2009 3. Starting and Running the Generator Set
FIGURE 13. FUEL VALVE
No. Description No. Description
1 Choke Lever 3 Closed
2 Open
FIGURE 14. CHOKE ROD
FIGURE 15. RECOIL START HANDLE
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3. Starting and Running the Generator Set 2-2009
3.4 Stopping the Generator Set
1. Turn off or disconnect all tools and appliances.
2. Let the generator set run for a few minutes to cool down.
3. Stop the generator set by pressing and holding the On/Off switch in the Off position until
the generator set stops.
4. Close the fuel valve.
WARNING: Gasoline is highly flammable and explosive which can result in severe
personal injury or death. Always close the fuel valve when the engine is not
in use to reduce the risk of fuel spillage.
3.5 Powering Tools and Appliances
CAUTION: Continuous overloading can damage the generator set due to overheating. Make
sure loading is within the generator set nameplate rating.
3.5.1 Voltage Selector Switch
An AC voltage selector switch is available on P3027 and P3500 portable generator sets.
To Power 120/240 Volt AC Circuits: Push the voltage selector switch on the control panel
towards the 120/240 Volt output receptacle. Power will also be available at the 120 Volt AC
receptacles. The voltmeter on the control panel will indicate approximately 240 Volts AC when
the generator set is running.
To Power 120 Volt AC Circuits Only: Push the voltage selector switch on the control panel
towards the 120 Volt output receptacles. The voltmeter on the control panel will indicate
approximately 120 Volts AC when the generator set is running.
3.5.2 Connecting Tools and Appliances
TABLE 2. TYPICAL POWER DRAW RATINGS OF COMMON TOOLS AND APPLIANCES
Appliance or Tool Running Watts (Rated)
Ceiling Fan 800 1200
Central Air Conditioner - 10,000 BTU
Central Air Conditioner - 24,000 BTU
Circular Saw - 7 ¼ " 1400 2300
Clock Radio 100 -
Clothes Dryer - Gas 700 1200
Coffee Maker 1500 -
Computer - 17" Monitor 800 -
Deep Freezer 700 1000
Dishwasher 1500 1500
2
2
1500 3000
3800 4950
1
Starting Watts (Peak)
1
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2-2009 3. Starting and Running the Generator Set
Electric Water Heater - 40 Gallon
2
4000 -
Furnace Fan 800 1300
GarageDoorOpener 750 1200
Hair Dryer 1250 -
Hot Plate 2100 -
Iron 1200 -
Laser Printer 950 -
Lighting 75 -
Microwave Oven 1000 -
Miter Saw - 10" 1650 2400
Oscillating Fan 200 400
Quartz Halogen Work Light 1000 -
Reciprocating Saw 1200 2000
Refrigerator/Freezer 700 1500
Security System
2
500 -
Space Heater 1800 -
Stereo Receiver 450 -
Sump Pump 800 1200
Table Fan - 14" 200 400
Television - 27" 500 -
VCR/DVD Player 100 -
Water Well Pump - 1/3 HP (220V)
2
1000 2000
Window Air Conditioner - 10,000 BTU 1200 2200
1
The wattage values listed in this table are based on estimated wattage requirements. For exact wattage, check the
data plate or the operator's manual for the item you wish to power.
2
These units are usually hard-wired and require a professionally-installed transfer switch.
NOTE: Ratings apply to altitudes up to 1000 feet (304.8 m), 85
each 1000 feet (304.8 m) above 1000 feet and 2.0% for each 10
o
85
o
F (30
C).
o
o
F (30
C). Total power available will decrease 3.5% for
o
o
F (5.5
C) increase in ambient temperature above
1. Make sure the tools and appliances to be connected are rated for the voltages at the
generator set power output receptacles.
2. Note the kW rating on the generator set nameplate.
3. Check the power draw (watts) of each tool or appliance to be connected. The table above
lists typical tool and appliance ratings in watts.
4. Add the watt ratings of all the loads that the generator set will be powering at the same
time. Make sure that total wattage will not exceed the generator kW rating.
Example: A generator set rated 2.5 kW (2500 watts) can power one 1500 watt heater, a
500 watt drill and a 100 watt light at the same time (2100 watts altogether). One of these
loads probably will have to be disconnected if some other tool or appliance is to be
powered.
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3. Starting and Running the Generator Set 2-2009
NOTE: A motor draws much more power when starting up than when running. It may
be necessary to power fewer tools or appliances when motors and air
conditioners are cycling on and off.
CAUTION: Excessive power draw can overload the generator set. A motor draws much more
power when starting up than when running. It may be necessary to power fewer
tools or appliances when motors and air conditioners are cycling on and off.
5. Connect the AC power cords to the appropriate receptacles on the control panel. See
"Grounding."
3.5.3 High Altitude
Maximum power decreases roughly four percent every 1000 feet (310 meters) of increase in
elevation above sea level. When operating the generator set at altitudes above 1000 feet, it may
be necessary to power fewer loads at the same time.
3.6 Charging Batteries
To reduce arcing, always stop the generator set before connecting or disconnecting the battery
to be charged. Connect the battery to be charged to the DC terminals on the control panel.
Make sure polarity is correct: positive (+) to positive (+); negative ( – ) to negative ( – ).
3.7 Circuit Breakers
WARNING: Ignition of explosive battery gases can cause severe personal injury or
death. Acring at battery terminals can ignite batterey gases. Ventilate the
area before working on batteries. Wear safety glasses and do not smoke.
Always stop the generator set before disconnecting the battery. Always
disconnect the negative ( – ) cable first and reconnect it last.
NOTE: The battery on electric-start models has its own charging circuit and
therefore must not be connected to the DC charging terminals.
If too many tools or appliances are connected, or a tool or appliance fails due to a short circuit,
one or more of the AC or DC circuit breakers on the control panel will trip. Disconnect or turn off
as many tools and appliances as possible and reset the circuit breaker by pushing the reset
button back in. (It takes at least 10 seconds after tripping to reset.) Turn on or reconnect only as
many tools and appliances as the generator set can power.
A tool or appliance probably has a short if it causes a circuit breaker to immediately trip when
connected.
WARNING: Short circuits in faulty electrical tools and appliances can cause
electrocution or fire. Read and follow the tool and appliance manufacturer's
instructions and warnings regarding use, maintenance, and proper
grounding.
3.8 Grounding
Ground the generator set to earth ground by connecting a suitable ground wire to the ground
lug terminal on the generator set control panel. The other end of the wire must be connected to
a suitable earth ground according to local electrical codes.
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2-2009 3. Starting and Running the Generator Set
Do not connect grounds from tools or appliances to the Ground Lug terminal. Extension cords
for tools or appliances with grounding blades must have grounding blades.
WARNING: If the generator neutral supply is not grounded to earth, the user may be left
without ground fault protection, which could result in serious personal injury
or death. Always make sure the generator neutral supply is grounded to
earth before operating the generator set.
3.9 Low Oil Shutdown
The generator set automatically stops if it senses low oil level. If the engine stops while running,
or starts but then stops, check the oil level and add oil as necessary. See the "Maintenance"
section of this manual.
3.10 Electrical Interference with Communications or Appliances
If the generator set causes electrical interference with communications devices, move the
generator set and device farther apart or shut down the generator set while the device is
operating.
3.11 Exercising the Generator Set
Exercise the generator set at least two hours every month if use is infrequent. Run it at
approximately 50 percent capacity. A single two-hour exercise period is better than several
shorter periods. Exercising a generator set drives off moisture, re-lubricates the engine,
replaces stale fuel, and removes oxides from electrical contacts. The result is better starting,
more reliable operation, and longer engine life.
3.12 Engine Break-In
Proper engine break-in is necessary for top performance.
1. Operate the generator set as it is intended to be operated. However, for the first 1-1/2
hours, if possible, run the generator set at 50 percent capacity, occasionally operating at
full power for brief periods. Avoid prolonged low-power operation during break-in.
2. Make sure the engine has oil of the proper viscosity for the ambient temperature. See
"RECOMMENDED ENGINE OIL."
3. Check the oil level twice a day or after every 4 hours of operation during the first 20 hours
of operation. Change the engine oil after the first 20 hours of operation.
3.13 Out-of-Service Protection
If you are unable to exercise the generator set regularly, and it will not be in use for more than
120 days, the following storage procedure is recommended. Failure to provide out-of-service
protection can result in difficult starting, rough engine operation, and reduced engine life.
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3. Starting and Running the Generator Set 2-2009
3.13.1 Storing the Generator Set
WARNING: Fuel additives can cause a risk of personal injury. Read and follow the
manufacturer's instructions.
1. Add a fuel preservative and stabilizer to the fuel tank, or let the generator set run out of
fuel. Follow the manufacturer ’ s instructions for using the fuel additive.
2. Shut the fuel valve and drain the carburetor bowl (see Figure 16 ).
3. Remove the spark plug. Squirt one tablespoon (about 30 cm
spark plug hole. Turn the engine over several revolutions. Replace the spark plug. Pull the
recoil starter handle out slowly until compression is felt.
4. Change engine oil and attach a tag indicating the viscosity of oil used.
5. Store the generator set in a dry, protected area.
3
) of clean engine oil into the
No. Description
1 Fuel Drain Bolt
FIGURE 16. CARBURETOR DRAIN
3.13.2 Returning the Generator Set to Service
1. Check the tag on generator set to verify that oil viscosity is correct for the current ambient
temperature. Add or change oil as necessary.
2. Clean the air cleaner if dirty.
3. Open the fuel valve.
4. Start the generator set. Initial start-up may be rough and smoky due to the extra oil in the
cylinder. Remove and clean the spark plug if necessary.
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4 Maintenance
4.1 Maintenance Schedule
Periodic maintenance is essential for top performance. Use the table below as a guide. Under
hot or dusty operating conditions, some maintenance operations should be performed more
frequently, as indicated by the footnotes in the table.
Keep a log of maintenance performed and the hours run. Recording maintenance will help you
keep it regular and provide a basis for supporting warranty claims. A "Maintenance Record"
form is included at the back of this manual.
WARNING: Accidental starting of the generator set during maintenance can cause
WARNING: Contact with a hot generator set can cause severe burns. Always allow the
severe personal injury or death. Before performing maintenance, disconnect
the spark plug wire from the spark plug. For electric start models, disconnect
both of the generator set starting battery cables. To reduce the risk of arcing,
remove the negative ( – ) cable first and reconnect it last.
generator set to cool before performing any maintenance or service.
TABLE 3. PERIODIC MAINTENANCE SCHEDULE
SERVICE INTERVAL
SERVICE THESE ITEMS
General Inspection X
Check Oil Level X
Test GFCI X
Change Engine Oil X X
Clean Air Filter X
Clean Cylinder Cooling Fins X
Clean Spark Plug X
Clean the Spark Arrestor X
Clean Fuel Sediment Cup X
Clean Fuel Tank X
Adjust Valve Lash X
Check fuel line Every 2 years (Replace if necessary)
EACH EVERY
USE MONTH
1
FIRST EVERY 3 EVERY 6 EVERY
MONTH OR MONTHS OR MONTHS OR YEAR OR
20 HOURS 50 HOURS 100 HOURS 300 HOURS
2
2
3
1. See "General Inspections."
2. Service more frequently when used in dusty environments.
3
3
3
3. These items must be performed by a trained and experienced mechanic (A list of authorized Cummins Onan
dealers is available at www.cumminsonan.com).
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4. Maintenance 2-2009
4.2 General Inspections
The operator should check the following before the first start of the day and after every eight
hours of operation:
1. Look for fuel leaks around the fuel tank, fuel hose, fuel valve, and carburetor. Close the
fuel valve and repair leaks immediately.
2. Look and listen for exhaust leaks while the engine is running. Have all leaks repaired
before continuing operation.
WARNING: Contact with a hot generator set can cause severe burns. Always allow the
generator set to cool before performing any maintenance or service.
3. Check for dirt and debris and clean as necessary.
CAUTION: A clogged flywheel air inlet screen or dirty cooling fins can cause overheating and
engine damage. Keep the cooling fins and air inlet screen clean.
4. Check the engine oil level and add oil as necessary. See "Changing Engine Oil."
4.3 Changing Engine Oil
WARNING: State and federal agencies have determined that contact with used engine oil
can cause cancer and reproductive toxicity. Avoid skin contact and breathing
of vapors. Use rubber gloves and wash exposed skin.
Refer to the Periodic Maintenance Schedule Table in the "Maintenance Schedule" section for
scheduled oil changes and Figure 17 .
1. Make sure the generator set is level and has been run until warm.
WARNING: Crankcase pressure can blow hot engine oil out of the fill opening, causing
severe burns. Always stop the generator set before removing the oil fill cap.
2. Stop the generator set and remove the oil fill cap (see Figure 17 ).
3. Remove the oil drain plug and drain the oil into a pan.
4. Reinstall the drain plug and refill with new engine oil just to the brim of the fill opening. Use
the oil fill tube provided with the generator to fill oil. See "Engine Oil Recommendations" for
the type of engine oil to use and "Specifications" for engine oil capacity.
CAUTION: Too little oil can cause severe engine damage. Make sure that the oil level is above
the Add mark on the dipstick.
5. Start the generator set and let it run for a short time while checking for oil leaks.
6. Used oil is harmful to the environment. Pour the used oil into a sealed container and
deliver it to the nearest recycling center.
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2-2009 4. Maintenance
No. Description No. Description
1 Oil Filler Cap 4 Upper Level
2 Oil Drain Bolt 5 Lower Level
3 Oil Fill Tube
4.4 Air Filter Maintenance
FIGURE 17. OIL CHECK, FILL, AND DRAIN
Refer to the "Maintenance Schedule" section for scheduled air filter maintenance. Clean more
often in dusty environments.
CAUTION: A dirty air cleaner restricts air flow to the carburetor. To prevent carburetor
malfunction, service the air cleaner regularly. Service more frequently when
operating the generator set in extremely dusty areas.
WARNING: Using gasoline or flammable solvents to clean components can cause a fire
or explosion, which can result in severe personal injury or death. Only use
soapy water or a nonflammable solvent for cleaning components.
CAUTION: Running the engine without an air cleaner causes rapid engine wear. Never run the
engine without the air cleaner installed.
1. Remove the filter cover (Item 2 in Figure 18 ) by unsnapping the two spring clips (Item 1).
2. Remove the two foam filter elements (Item 3) and thoroughly wash them with soap and
water. Let them dry thoroughly.
3. Knead in 1 teaspoon (5 cm
3
) of clean engine oil into each foam filter element. The oil
should be distributed evenly throughout each filter element.
4. Reinstall the filter elements, the gray filter first (finer pores), and then the black filter (larger
pores).
5. Secure the cover with the spring clips.
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4. Maintenance 2-2009
No. Description No. Description
1 Clip 3 Air Filter Element
2 Air Filter Cover
4.5 Fuel Sediment Cup Cleaning
Refer to the "Maintenance Schedule" section for scheduled cleaning. Have the filter replaced if
the fuel has been contaminated or the engine seems to have lost power. Cleaning and
replacement must only be performed by an authorized Cummins Onan dealer.
4.6 Spark Plug Maintenance
Refer to the "Maintenance Schedule" section for scheduled spark plug maintenance. Perform
spark plug maintenance sooner if engine performance has deteriorated. To ensure proper
engine operation, the spark plug must be properly gapped and free of deposits. A fouled spark
plug can cause the engine to misfire, operate erratically, or stop running when a load is applied.
WARNING: Contact with hot generator parts can cause severe burns. Always allow the
generator set to cool before performing any maintenance or service.
1. Turn off the generator set and allow it to cool down.
2. Remove the spark plug cap.
3. Clean any dirt from around the spark plug base.
4. Use the wrench supplied in the tool kit to remove the spark plug.
FIGURE 18. AIR FILTER
5. Visually inspect the spark plug. Discard it if the insulator is cracked or chipped. If the spark
plug is to be reused, clean it with a wire brush.
6. Measure the plug gap with a feeler gauge. Correct as necessary by carefully bending the
side electrode. The gap should be 0.70-0.80mm (0.028-0.031 inch).
30 914-0102 (Issue 3)
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2-2009 4. Maintenance
7. Verify that that the spark plug washer is in good condition Thread the spark plug in by
hand to prevent cross-threading.
8. After the spark plug is seated, tighten with a spark plug wrench to compress the washer. If
installing a new spark plug, tighten 1/2 turn after the spark plug seats to compress the
washer. If reinstalling a used spark plug, tighten 1/8-1/4 turn after the spark plug seats to
compress the washer.
No. Description No. Description
1 Removed Spark Plug Boot 2 Plug Wrench
FIGURE 19. SPARK PLUG REMOVAL
No. Description No. Description
1 Side Electrode 2 Metal Brush
FIGURE 20. SPARK PLUG MAINTENANCE
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4. Maintenance 2-2009
4.7 Cleaning the Generator Set
Refer to the "Maintenance Schedule" section for scheduled cleaning of the generator set. Clean
more often in dusty environments. Remove spilled oil and fuel from the generator set
immediately with a dry rag. Dispose of cleaning rags properly. Use a damp cloth to clean dust
and dirt from the generator set. Do not use cleaning solvents, which can damage electrical
components.
WARNING: Wear safety glasses to protect your eyes from flying debris when cleaning
the generator set with compressed air.
CAUTION: Cleaning the generator set with a pressure washer can cause damage to the
generator set by shorting the generator and other electrical components. Do not
use a pressure washer to clean the generator set.
Wear safety glasses if using compressed air to clean the engine cooling fins. Do not use a
pressure washer to clean the generator set. Water can enter the generator and other electrical
components causing shorts that can disable the generator set.
4.8 Cleaning the Spark Arrester
WARNING: Contact with a hot muffler can cause severe burns. Allow the generator set to
cool before servicing the muffler.
Refer to the "Maintenance Schedule" section for scheduled spark arrester cleaning. After letting
the generator set cool down, remove the spark arrester screen. Inspect for damage and replace
if defective. To clean, lightly tap the screen and clean any deposits with a wire brush. Reinstall
the spark arrester and tighten the screw securely.
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2-2009 4. Maintenance
No. Description
1 Spark Arrestor
FIGURE 21. SPARK ARRESTOR
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4. Maintenance 2-2009
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34 914-0102 (Issue 3)
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5 Troubleshooting
The following troubleshooting guide can be used for basic problem diagnosis. If these
recommendations do not resolve the problem, contact an authorized Cummins Onan service
center.
WARNING: Many troubleshooting procedures or replacement of parts present hazards
that can result in equipment damage or severe personal injury or death. Only
trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform service procedures.
Review the Safety Precautions section of this manual.
WARNING: Contact with a hot generator set can cause severe burns. Always allow the
generator set to cool before performing any maintenance or service.
ENGINE WON'T START
Logic: The generator set will not start.
Possible Causes:
· Out of fuel
· Fuel value closed
· Loose spark plug cable
· Defective spark plug
· Low oil level
Corrective Action:
1. Make sure the fuel tank is full.
2. Make sure the fuel valve is fully open.
3. Make sure the spark plug cable is connected.
4. Remove and clean the spark plug; replace it if necessary.
5. Check the oil level and add oil as necessary.
6. If the problem is still not corrected, contact a Cummins Onan service center.
BLACK EXHAUST
Logic: The exhaust is dark.
Possible Causes:
· Choke stuck in the closed position
· Dirty air cleaner
· Rich fuel mixture
Corrective Action:
1. Make sure the choke is open.
2. Clean the air cleaner.
3. If the problem is still not corrected, contact a Cummins Onan service center for information
on fuel mixtures.
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5. Troubleshooting 2-2009
WARNING: Many troubleshooting procedures or replacement of parts present hazards
that can result in equipment damage or severe personal injury or death. Only
trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform service procedures.
Review the Safety Precautions section of this manual.
WARNING: Contact with a hot generator set can cause severe burns. Always allow the
generator set to cool before performing any maintenance or service.
ENGINE STOPS
Logic: The generator set stops on its own.
Possible Causes:
· Out of fuel
· Low oil level
Corrective Action:
1. Make sure the fuel tank is full.
2. Check the oil level and add oil as necessary.
3. If the problem is still not corrected, contact a Cummins Onan service center.
ENGINE SURGES
Logic: The engine suddenly runs faster than normal.
Possible Causes:
· Loose spark plug cable
· Faulty spark plug
· Generator set not level
· Dirty fuel strainer
Corrective Action:
1. Make sure the spark plug cable is properly connected or have it serviced, if damaged.
2. Remove and clean or replace the spark plug.
3. Make sure the generator set is on a level surface.
4. Check the fuel strainer and clean if necessary.
5. If the problem is still not corrected, contact a Cummins Onan service center.
36 914-0102 (Issue 3)
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2-2009 5. Troubleshooting
WARNING: Many troubleshooting procedures or replacement of parts present hazards
that can result in equipment damage or severe personal injury or death. Only
trained and experienced service personnel with knowledge of fuels,
electricity, and machinery hazards should perform service procedures.
Review the Safety Precautions section of this manual.
WARNING: Contact with a hot generator set can cause severe burns. Always allow the
generator set to cool before performing any maintenance or service.
NO AC OUTPUT
Logic: The generator set is running but you are not able to operate any tools or appliances.
Possible Causes:
· Tripped AC circuit breaker
Corrective Action:
1. Remove all loads.
2. Reset the circuit breaker.
3. Check loads for defects and make sure the total load does not exceed the generator set
rating.
4. If the problem is still not corrected, contact a Cummins Onan service center.
NO DC OUTPUT
Logic: The engine will not crank.
Possible Causes:
· Tripped DC circuit breaker
Corrective Action:
1. Disconnect the battery.
2. Reset the circuit breaker.
3. Have the battery tested for shorts and, if necessary, replace the battery.
4. If the problem is still not corrected, contact a Cummins Onan service center.
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5. Troubleshooting 2-2009
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38 914-0102 (Issue 3)
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6 Specifications
TABLE 4. P2220C (EGMBB), P2927, P2927C, AND P3027 (EGMBG) SPECIFICATIONS
EGMBB EGMBG
GENERATOR P2220c P2927 P2927c P3027
AC OUTPUT:
Frequency (Hertz) 60 Hz 60 Hz 60 Hz 60 Hz
Voltage 120 Volts 120 / 240 Volts 120 / 240 Volts 120 / 240 Volts
Rated Power 2000 Watts 2700 Watts 2700 Watts 2700 Watts
Rated Current 16.6 Amps 22.5 / 11.3 Amps 22.5 / 11.3 Amps 22.5 / 11.3 Amps
DC OUTPUT: 12 VDC / 8.3 Amps - - 12 VDC / 8.3 Amps
ENGINE
Engine Speed
(RPM)
Fuel Gasoline Gasoline Gasoline Gasoline
Engine Oil
Capacity*
Spark Plug Type F7RTC F7RTC F7RTC F7RTC
Spark Plug Gap 0.028 in. (0.7 mm) 0.028 in. (0.7 mm) 0.028 in. (0.7 mm) 0.028 in. (0.7 mm)
Engine Valve Lash
(Intake and
Exhaust)
Ignition Timing
(Fixed)
Starting System Recoil Recoil Recoil Recoil
Displacement 197 cc 197 cc 197 cc 197 cc
GENERATOR SET
Dry Weight 100 lbs (45 kg) 100 lbs (45 kg) 100 lbs (45 kg) 100 lbs (45 kg)
Dimensions:
Length 23.2 inches (590 mm) 23.2 inches (590 mm) 23.2 inches (590 mm) 23.2 inches (590 mm)
Width 18.7 inches (475 mm) 18.7 inches (475 mm) 18.7 inches (475 mm) 18.7 inches (475 mm)
Height 18 inches (457 mm) 18 inches (457 mm) 18 inches (457 mm) 18 inches (457 mm)
Fuel Tank Capacity 4 US Gal (15 L) 4 US Gal (15 L) 4 US Gal (15 L) 4 US Gal (15 L)
Operating Time at
Rated Output
* See "Engine Oil recommendations" for recommended engine oil type.
0.0039 - 0.066 inches 0.0039 - 0.066 inches 0.0039 - 0.066 inches 0.0039 - 0.066 inches
3600 3600 3600 3600
0.63 US qt (0.6 L) 0.63 US qt (0.6 L) 0.63 US qt (0.6 L) 0.63 US qt (0.6 L)
(0.10 - 0.15 mm) (0.10 - 0.15 mm) (0.10 - 0.15 mm) (0.10 - 0.15 mm)
20 ° BTDC 20 ° BTDC 20 ° BTDC 20 ° BTDC
13 Hours 8 Hours 8 Hours 8 Hours
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6. Specifications 2-2009
TABLE 5. P2400 (EGMBB) AND P3500 (EGMBG) SPECIFICATIONS
GENERATOR P2400 (EGMBB) P3500 (EGMBG)
AC OUTPUT:
Frequency (Hertz) 60 Hz 60 Hz
Voltage 120 Volts 120 / 240 Volts
Rated Power 2000 Watts 2500 Watts
Rated Current 16.6 Amps 20.8 / 10.4 Amps
DC OUTPUT: 12 VDC / 8.3 Amps 12 VDC / 8.3 Amps
ENGINE
Engine Speed (RPM) 3600 3600
Fuel Gasoline Gasoline
Engine Oil Capacity* 0.63 US qt (0.6 L) 0.63 US qt (0.6 L)
Spark Plug Type F7RTC F7RTC
Spark Plug Gap 0.028 in. (0.7 mm) 0.028 in. (0.7 mm)
Engine Valve Lash 0.0039 – 0.006 inches 0.0039 – 0.006 inches
(Intake and Exhaust) (0.10 – 0.15 mm) (0.10 – 0.15 mm)
Ignition Timing (fixed) 20 ° BTDC 20 ° BTDC
Starting System Recoil Recoil
Displacement 197 cc 197 cc
GENERATOR SET
Dry Weight 99.9 lb (45 kg) 106.6 lb (48 kg)
Dimensions:
Length 24.1 inches (612 mm) 24.1 inches (612 mm)
Width 19.6 inches (497 mm 19.6 inches (497 mm
Height 19.3 inches (490 mm) 19.3 inches (490 mm)
Fuel Tank Capacity 4 US Gal (15 L) 4 US Gal (15 L)
Operating Time at Rated Output 13 Hours 12 Hours
* See "Engine Oil recommendations" for recommended engine oil type.
TABLE 6. FUEL CONSUMPTION AND RUN TIME VS. PERCENT LOAD - EGMBB MODELS
Tank Capacity Fuel Rate
100% 75% 50 % 25 % 0 %
Grams / hr 1125 980 910 830 740
Liter / Hr 1.40 1.30 1.20 1.10 1.00
15.1L
Gallons / hr 0.37 0.35 0.32 0.30 0.26
Estimated Run Time (hr) 10.90 11.40 12.30 13.50 15.10
Percent Load
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2-2009 6. Specifications
TABLE 7. FUEL CONSUMPTION AND RUN TIME VS. PERCENT LOAD - EGMBG MODELS
Tank Capacity Fuel Rate
15.1L
Estimated Run Time (hr) 9.70 10.80 11.80 13.30 15.00
Percent Load
100% 75% 50 % 25 % 0 %
Grams / hr 1153 1033 947 839 744
Liter / Hr 1.60 1.40 1.30 1.10 1.00
Gallons / hr 0.41 0.37 0.34 0.30 0.27
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6. Specifications 2-2009
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42 914-0102 (Issue 3)
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7 Important Information for California
Users
NOTE: This section applies to P2220c and P2927c models. It also applies to P2400
and P3500 models built before 2008.
These generator sets meet the requirements of California ’ s Exhaust Emissions Standards for
Utility and Lawn and Garden Equipment Engines, which correspond to the engine class, the
year manufactured, and the date of the original sale, if equipped with an emissions label so
stating.
As a California user of this engine, please be aware that unauthorized modifications or
replacement of fuel, exhaust, air intake, or speed control system components that affect engine
emissions are prohibited. Unauthorized modification, removal, or replacement of the engine
label is prohibited.
Carefully review this Operator Manual along with any other manuals and information you
received with your generator set. If you are unsure that the installation, use, maintenance, or
service of your generator set is authorized, seek assistance from an approved Cummins Onan
engine dealer or an approved dealer for your equipment.
California engine users may use the information below as an aid in locating information related
to the California Air Resources Board requirements for emissions control.
TABLE 8. EMISSIONS CONTROL INFORMATION
Engine Warranty Information The California emissions control warranty statement is
Engine Valve Lash See "Specifications."
Engine Ignition Timing See "Specifications."
Engine Fuel Requirements The engine is certified to operate on unleaded gasoline.
Engine Lubricating Oil Requirements See Engine Oil Recommendations in "Introduction."
Engine Fuel Mixture Settings These engines have precision – manufactured carburetors
Engine Adjustments See "Starting and Running the Generator Set."
Engine Emission Control System The engine emission control system consists of internal
located in the same packet of information as this manual
when the engine is shipped from the factory.
See Fuel Recommendations in "Introduction."
which are not adjustable.
engine design and construction.
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7. Important Information for California Users 2-2009
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44 914-0102 (Issue 3)
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8 Maintenance Record
Record all periodic and unscheduled maintenance and service. Refer to the "Maintenance"
section of this manual.
DATE METER MAINTENANCE OR SERVICE PERFORMED
HOUR
READING
Record the name, address, and phone number of your authorized Cummins Onan service
center.
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8. Maintenance Record 2-2009
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Page 52
Cummins Power Generation
1400 73rd Ave. NE
Minneapolis, MN 55432 USA
Phone 1 763 574 5000
Toll-free 1 800 888 6626
Fax 1 763 574 5298
Email www.cumminsonan.com/contact
www.cumminsonan.com
CumminsR, OnanR, the “C” logo, and “Performance you rely on.”
are trademarks of Cummins Inc.
E2008 Cummins Power Generation, Inc. All rights reserved.
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