ECS 8kW, 20kW, 10kW, 14kW, 17kW Owner's Manual

DANGER

C

Owner’s Manual

8, 10, 14, 17 & 20kW Air-cooled,

Automatic Standby Generators

U

S

LISTE

D

DO NOT LIFT UNIT BY ROOF!

Not intended for use as Primary Power in place of utility

 

DEADLY EXHAUST FUMES. OUTDOOR INSTALLATION ONLY!

or in life-support applications.

INTRODUCTION

DANGER

Thank you for purchasing this compact, high performance, air­cooled, engine-driven generator. It is designed to automatically
supply electrical power to operate critical loads during a utility
power failure.

This unit is factory installed in an all-weather, metal enclosure that
is intended exclusively for outdoor installation. This generator
will operate using either vapor withdrawn liquid propane (LP) or
natural gas (NG).

NOTE:

This generator is suitable for supplying typical
residential loads such as Induction Motors (sump
pumps, refrigerators, air conditioners, furnaces, etc.),
Electronic Components (computer, monitor, TV, etc.),
Lighting Loads and Microwaves.

READ THIS MANUAL THOROUGHLY 

If any portion of this manual is not understood, contact the nearest
Dealer for star ting, operating and ser vicing procedures.

Throughout this publication, and on tags and decals affixed to the
generator, DANGER, WARNING, CAUTION and NOTE blocks are
used to aler t personnel to special instructions about a par ticular
operation that may be hazardous if perfor med incorrectly or care­lessly. Observe them carefully. Their definitions are as follows:

After this heading, read instructions that, if not

strictly complied with, will result in serious per­sonal injury, including death, in addition to prop­erty damage.

After this heading, read instructions that, if not

strictly complied with, may result in serious per­sonal injury or property damage.

After this heading, read instructions that, if not

strictly complied with, could result in damage to
equipment and/or property.

NOTE:

After this heading, read explanatory statements that

require special emphasis.

These safety warnings cannot eliminate the hazards that they
indicate. Common sense and strict compliance with the special
instructions while performing the service are essential to pre­venting accidents.

Four commonly used safety symbols accompany the DANGER,
WARNING and CAUTION blocks. The type of information each
indicates follows:

This symbol points out potential fire hazard.



This symbol points out potential electrical shock



hazard.

The operator is responsible for proper and safe use of the equip­ment. The manufacturer strongly recommends that the operator
read this Owner's Manual and thoroughly understand all instruc­tions before using this equipment. The manufacturer also strongly
recommends instructing other users to properly start and operate
the unit. This prepares them if they need to operate the equipment
in an emergency.

CONTENTS 

This manual contains pertinent owner’s information for these
models:

7 kW NG, 8 kW LP, single-cylinder GH-410 Engine•
9 kW NG, 10 kW LP, V-twin GT-530 Engine•
13 kW NG, 14 kW LP, V-twin GT-990 Engine•
16 kW NG, 17 kW LP, V-twin GT-990 Engine•
18 kW NG, 20 kW LP, V-twin GT-999 Engine•

OPERATION AND MAINTENANCE 

It is the operator's responsibility to perfor m all safety checks, to
make sure that all maintenance for safe operation is performed
promptly, and to have the equipment checked periodically by a
Dealer. Normal maintenance service and replacement of parts
are the responsibility of the owner/operator and, as such, are not
considered defects in materials or workmanship within the terms
of the warranty. Individual operating habits and usage contribute to
the need for maintenance service.

Proper maintenance and care of the generator ensures a minimum
number of problems and keep operating expenses at a minimum.
See a Dealer for service aids and accessories.

HOW TO OBTAIN SERVICE 

When the generator requires servicing or repairs, contact a Dealer
for assistance. Service technicians are factory-trained and are
capable of handling all service needs.

When contacting a Dealer about par ts and service, always supply
the complete model number and serial number of the unit as given
on its data decal, which is located on the generator . See section "The
Generator" for decal location.

Model No. _________________ Serial No. ______________

This symbol points out important safety informa-



tion that, if not followed, could endanger per­sonal safety and/or property of others.

This symbol points out potential explosion haz-



ard.

Table of Contents

Air-cooled Generators

Introduction .................... Inside Front Cover

Read This Manual Thoroughly .............................................IFC

Contents ............................................................................IFC

Operation and Maintenance.................................................IFC

How to Obtain Service ........................................................IFC

Table of Contents ........................................1

Safety Rules .................................................2

Standards Index .....................................................................3

Section 1 – General Information .................4

1.1 Unpacking/Inspection .....................................................4

1.2 Protection Systems ........................................................4

1.3 NEC Requirement for Arc Fault Circuit

Interruption Breaker for Bedrooms ..................................4

1.4 Emission Information......................................................5

1.5 The Generator ................................................................6

1.6 Specifications ................................................................7

1.7 System Set LED .............................................................8

1.8 Fuel Requirements and Recommendations ......................8

1.9 Fuel Consumption ..........................................................8

1.10 Reconfiguring the Fuel System ........................................9

1.11 Location .......................................................................10

1.12 Battery Requirements ...................................................13

1.13 Battery Installation ........................................................13

1.14 The Battery ..................................................................13

1.15 Battery Charger ............................................................14

Section 2 – Post Installation Start-up

and Adjustments .................... 14

2.1 Before Initial Startup .....................................................14

2.2 Electrical Checks ..........................................................14

2.3 Generator Tests Under Load ..........................................15

2.4 Checking Automatic Operation ......................................15

2.5 Engine Governor Adjustment ........................................16

2.6 Voltage Regulator Adjustment .......................................16

Section 3 – Operation ................................17

3.1 Control Panel Interface .................................................17

3.2 Automatic Transfer Operation ........................................18

3.3 Sequence of Automatic Operation .................................18

3.4 Manual Transfer Operation ............................................19

3.5 Side Compartment (V-twin Only) ..................................20

3.6 Protection Systems ......................................................21

Section 4 – Maintenance ...........................22

4.1 Fuse .............................................................................22

4.2 Checking the Engine Oil Level .......................................22

4.3 Changing the Engine Oil ................................................23

4.4 Changing the Engine Air Cleaner ...................................24

4.5 Spark Plug(s) ...............................................................25

4.6 Battery Maintenance .....................................................25

4.7 Adjusting GH-410/GT-530/990/999 V alve Clearance ......25

4.8 Cooling System ............................................................26

4.9 Attention After Submersion ...........................................27

4.10 Corrosion Protection.....................................................27

4.11 Out of Service Procedure ..............................................27

4.12 Service Schedule .........................................................28

Section 5 – Troubleshooting .....................29

5.1 Troubleshooting Guide ..................................................29

Section 6 – Appendix ................................30

6.1 Menu System Navigation ..............................................30

Section 7 – Installation Diagrams ............. 32

Section 8 – Warranty .................................36

1

IMPORTANT SAFETY INSTRUCTIONS

Air-cooled Generators

SAVE THESE INSTRUCTIONS – The manufacturer suggests that these rules for safe operation be copied and posted near

the unit’s installation site. Safety should be stressed to all operators and potential operators of this equipment.



GENERAL HAZARDS



The engine exhaust from this product

contains chemicals known to the state

of California to cause cancer, birth

defects or other reproductive harm.



This product contains or emits chemicals

known to the state of California to cause

cancer, birth defects or other reproductive harm.

Study these SAFETY RULES carefully before installing, operating
or servicing this equipment. Become familiar with this Owner’s
Manual and with the unit. The generator can operate safely, effi­ciently and reliably only if it is properly installed, operated and
maintained. Many accidents are caused by failing to follow simple
and fundamental rules or precautions.

The manufacturer cannot anticipate every possible circumstance
that might involve a hazard. The warnings in this manual, and on
tags and decals affixed to the unit are, therefore, not all-inclusive. If
using a procedure, work method or operating technique the manu­facturer does not specifically recommend, ensure that it is safe for
others. Also make sure the procedure, work method or operating
technique utilized does not render the generator unsafe.

WARNING:

WARNING:





DANGER

Despite the safe design of this generator,



operating this equipment imprudently, neglecting
its maintenance or being careless can cause
possible injury or death. Permit only responsible
and capable persons to install, operate and main­tain this equipment.

Potentially lethal voltages are generated by



these machines. Ensure all steps are taken to
render the machine safe before attempting to
work on the generator.

Parts of the generator are rotating and/or hot



during operation. Exercise care near running
generators.

Installation must always comply with applicable



codes, standards, laws and regulations.

A running generator gives off carbon monoxide,



and odorless, colorless poison gas. Breathing in
carbon monoxide can cause headaches, fatigue,
diziness, nausea, vomitting, confusion, fainting,
siezures or death.

2



For safety reasons, the manufacturer recommends that this equip-•

ment be installed, serviced and repaired by a Service Dealer or
other competent, qualified electrician or installation technician who
is familiar with applicable codes, standards and regulations. The
operator also must comply with all such codes, standards and
regulations.

The engine exhaust fumes contain carbon monoxide, which •

can be DEADLY. This dangerous gas, if breathed in sufficient
concentrations, can cause unconsciousness or even death.
Do NOT alter or add to the exhaust system or do anything that
might render the system unsafe or in noncompliance with appli­cable codes and standards.

Install a battery operated carbon monoxide alarm indoors, •

according to manufacturer's instructions/recommendations.

Adequate, unobstructed flow of cooling and ventilating air is •

critical to correct generator operation. Do not alter the instal­lation or permit even par tial blockage of ventilation provisions,
as this can seriously affect safe operation of the generator. The

generator MUST be installed and operated outdoors only.

Keep hands, feet, clothing, etc., away from drive belts, fans, •

and other moving or hot par ts. Never remove any drive belt or
fan guard while the unit is operating.

When working on this equipment, remain alert at all times. •

Never work on the equipment when physically or mentally
fatigued.

Inspect the generator regularly, and contact the nearest Dealer •

for par ts needing repair or replacement.

Before perfor ming any maintenance on the generator, discon-•

nect its battery cables to prevent accidental start up. Disconnect
the cable from the battery post indicated by a NEGATIVE, NEG
or (–) first, then remove the POSITIVE, POS or (+) cable. When
reconnecting the cables, connect the POSITIVE cable first, the
NEGATIVE cable last.

Never use the generator or any of its par ts as a step. Stepping •

on the unit can stress and break par ts, and may result in dan­gerous operating conditions from leaking exhaust gases, fuel
leakage, oil leakage, etc.

ENGINE EXHAUST HAZARDS



Generator engine exhaust contains DEADLY carbon monox-•

ide, an odorless, colorless poisonous gas. Breathing carbon
monoxide can cause: dizziness, throbbing temples, nausea,
muscular twitching, headache, vomiting, weakness and sleepi­ness, inability to think clearly, fainting, unconsciousness or
even death. If you experience any carbon monoxide poisoning
symptoms, move into fresh air and immediately seek medical
attention.

Never operate the generator set with the vehicle inside any •

garage or other enclosed area.







ELECTRICAL HAZARDS



All generators covered by this manual produce dangerous •

electrical voltages and can cause fatal electrical shock. Utility
power delivers extremely high and dangerous voltages to the
transfer switch as does the standby generator when it is in
operation. Avoid contact with bare wires, terminals, connec­tions, etc., while the unit is running. Ensure all appropriate
covers, guards and barriers are in place, secured and/or locked
before operating the generator. If work must be done around
an operating unit, stand on an insulated, dry sur face to reduce
shock hazard.

Do not handle any kind of electrical device while stand-•

ing in water, while barefoot, or while hands or feet are wet.
DANGEROUS ELECTRICAL SHOCK MAY RESULT.

The National Electrical Code (NEC) requires the frame and external •

electrically conductive par ts of the generator to be connected to
an approved earth ground. Local electrical codes also may require
proper grounding of the generator electrical system.

After installing this home standby electrical system, the genera-•

tor may crank and start at any time without warning. When this
occurs, load circuits are transferred to the STANDBY (genera­tor) power source. To prevent possible injury if such a start and
transfer occur, always set the generator ’s AUTO/OFF/MANUAL
switch to its OFF position before working on equipment and
remove the 15A fuse from the generator control panel.

In case of accident caused by electric shock, immediately shut •

down the source of electrical power. If this is not possible,
attempt to free the victim from the live conductor. AVOID DIRECT
CONTACT WITH THE VICTIM. Use a nonconducting implement,
such as a dry rope or board, to free the victim from the live
conductor. If the victim is unconscious, apply first aid and get
immediate medical help.

Never wear jewelry when working on this equipment. Jewelr y •

can conduct electricity resulting in electric shock, or may get
caught in moving components causing injury.

FIRE HAZARDS



For fire safety, the generator must be installed and maintained •

properly. Installation must always comply with applicable
codes, standards, laws and regulations. Adhere strictly
to local, state and national electrical and building codes.
Comply with regulations the Occupational Safety and Health
Administration (OSHA) has established. Also, ensure that the
generator is installed in accordance with the manufacturer’s
instructions and recommendations. Following proper installa­tion, do nothing that might alter a safe installation and render
the unit in noncompliance with the aforementioned codes,
standards, laws and regulations.

Keep a fire extinguisher near the generator at all times. •

Extinguishers rated “ABC” by the National Fire Protection
Association are appropriate for use on the standby electric
system. Keep the extinguisher properly charged and be familiar
with its use. Consult the local fire depar tment with any ques­tions per taining to fire extinguishers.





IMPORTANT SAFETY INSTRUCTIONS

Air-cooled Generators

EXPLOSION HAZARDS



Do not smoke around the generator. Wipe up any fuel or oil •

spills immediately . Ensure that no combustible materials are left
in the generator compar tment, or on or near the generator, as
FIRE or EXPLOSION may result. Keep the area surrounding the
generator clean and free from debris.

Gaseous fluids such as natural gas and liquid propane (LP) •

gas are extremely EXPLOSIVE. Install the fuel supply system
according to applicable fuel-gas codes. Before placing the
home standby electric system into service, fuel system lines
must be properly purged and leak tested according to applica­ble code. After installation, inspect the fuel system periodically
for leaks. No leakage is permitted.

STANDARDS INDEX 

In the absence of pertinent standards, codes, regulations and
laws, the published information listed below may be used for
installation guidance for this equipment.

1. NFPA No. 37, STATIONARY COMBUSTION ENGINES AND
GAS TURBINES, available from the National Fire Protection
Association, 470 Atlantic Avenue, Boston, MA 02210.

2. NFPA No. 76A, ESSENTIAL ELECTRICAL SYSTEMS FOR
HEALTH CARE FACILITIES, available same as Item 1.

3. NFPA No. 54, NATIONAL FUEL GAS CODE, available same as
Item 1.

4. NFPA No. 58, AMERICAN NATIONAL STANDARD FOR
STORAGE AND HANDLING OF LIQUEFIED PETROLEUM GAS,
available same as Item 1.

5. NFPA No. 70, NFPA HANDBOOK OF NATIONAL ELECTRIC
CODE, available same as Item 1.

6. Article X, NATIONAL BUILDING CODE, available from the
American Insurance Association, 85 John Street, New York,
N.Y. 10038.

7. AGRICUL TUR AL WIRING HANDBOOK, available from the F ood
and Energy Council, 909 University Avenue, Columbia, MO

65201.

8. ASAE EP-3634, INSTALLATION AND MAINTENANCE OF
FARM STANDBY ELECTRICAL SYSTEMS, available from the
American Society of Agricultural Engineers, 2950 Niles Road,
St. Joseph, MI 49085.

9. NFPA No. 30, FLAMMABLE AND COMBUSTIBLE LIQUIDS
CODE, available same as Item 1.



3

DANGER

Section 1 — General Information

Air-cooled Generators

Only qualified electricians or contractors should



attempt such installations, which must comply
strictly with applicable codes, standards and regu­lations.

1.1 UNPACKING/INSPECTION

After unpacking, carefully inspect the contents for damage.

This standby generator set is ready for installation with a factory •

supplied and pre-mounted base pad and has a weather protec­tive enclosure that is intended for outdoor installation only.

If this generator is used to power electrical load



circuits normally powered by a utility power
source, it is required by code to install a transfer
switch. The transfer switch must effectively isolate
the electrical system from the utility distribution
system when the generator is operating (NEC 700,
701 & 702). Failure to isolate an electrical system
by such means will result in damage to the gen­erator and also may result in injury or death to
utility power workers due to backfeed of electrical
energy.

If any loss or damage is noted at time of delivery, have the
person(s) making the delivery note all damage on the freight bill
or affix their signature under the consignor's memo of loss or
damage.

If a loss or damage is noted after deliver y, separate the damaged
materials and contact the carrier for claim procedures.

“Concealed damage” is understood to mean damage to the con­tents of a package that is not in evidence at the time of delivery,
but is discovered later.

To properly open the roof, press down on the center top lip and
release the latch. If pressure is not applied from the top, the roof
may appear stuck. Always verify that the side lock is unlocked
before attempting to lift the roof.

1.2 PROTECTION SYSTEMS

Unlike an automobile engine, the generator may have to run for
long periods of time with no operator present to monitor engine
conditions. For that reason, the engine is equipped with the fol­lowing systems that protect it against potentially damaging condi­tions:

1. Low Oil Pressure Sensor

2. High Temperature Sensor

3. Overcrank

4. Overspeed

5. RPM Sensor

6. Low Battery

There are readouts on the control panel to notify personnel that one
of these failures has occurred. There is also a System Set LED
(single cylinder) or a Status message on the display (V-twins) that
displays when all of the conditions described in the "System Set
LED" section are true.

1.3 NEC REQUIREMENT FOR ARC FAULT

CIRCUIT INTERRUPTION BREAKER FOR
BEDROOMS

In 2001, the National Electric Code (NEC) introduced a requirement
for new construction. This new requirement indicates the need for
Arc Fault Circuit Interrupters to be used to protect the complete
branch circuit that feeds a dwelling bedroom. The actual NEC
requirement is indicated below.

1.3.1 SECTION 210.12 ARC FAULT CIRCUIT INTER - 

RUPTER PROTECTION

1. Definition: An arc fault circuit interrupter is a device intended
to provide protection from the effects of arc faults by recog­nizing characteristics unique to arcing and by functioning to
de-energize the circuit when an arc fault is detected.

2. Dwelling Unit Bedrooms: All branch circuits that supply 125
volt, single-phase, 15 and 20 ampere outlets installed in
dwelling unit bedrooms shall be protected by an arc fault cir­cuit interrupter listed to provide protection of the entire branch
circuit.

Section 210.12 requires that AFCI protection be provided on branch
circuits that supply outlets (receptacle, lighting, etc.) in dwell­ing bedrooms. The requirement is limited to 15 and 20 ampere,
125 volt circuits. There is no prohibition against providing AFCI
protection on other circuits or in locations other than bedrooms.
Because circuits are often shared between a bedroom and other
areas such as closets and hallways, providing AFCI protection on
the complete circuit would comply with 210.12.

If during the installation of the home standby system the decision
is made to provide back up power to a bedroom branch circuit,
then the circuit breaker in the transfer switch should be replaced
with an Arc Fault Circuit Interrupter.

It is most impor tant that breakers only be switched like for like.
For instance, if replacing a 15A breaker, it MUST be replaced with
a 15A AFCI breaker. Likewise, a 20A breaker MUST be replaced
with a 20A AFCI.

These AFCI breakers are available at the nearest hardware store.
Eaton Cat # Description
BR115AF 1" 15A Single Pole AFCI
CH115AF 3/4" 15A Single Pole AFCI
BR120AF 1" 20A Single Pole AFCI
CH120AF 3/4" 20A Single Pole AFCI

4

Section 1 — General Information

Air-cooled Generators

1.4 EMISSION INFORMATION

The Environmental Protection Agency requires that this generator
complies with exhaust emission standards. This generator is certi­fied to meet the applicable EPA emission levels. Additional infor­mation regarding the requirements set by the EPA is as follows:

The generator is certified for use as a stationary engine for standby
power generation. Any other use may be a violation of federal
and/or local laws. It is impor tant that to follow the maintenance
specifications in the "Maintenance" section to ensure that the
engine complies with the applicable emission standards for the
duration of the engine’s life. This engine is cer tified to operate on
Liquid Propane fuel and pipeline Natural Gas. The emission control
system on the generator consists of the following:

Fuel Metering System•

Carburetor/mixer assembly•
Fuel regulator•

Air Induction System•

Intake pipe/manifold•
Air cleaner•

Ignition System•

Spark plug•
Ignition module•

The Emissions Compliance Period referred to on the Emissions
Compliance Label indicates the number of operating hours for
which the engine has been shown to meet Federal emission
requirements. See the table below to determine the compliance
period for the generator. The displacement of the generator is listed
on the Emissions Compliance Label.

Displacement Category Compliance Period

A 300 Hours

< 66 cc

 66 cc ­< 225 cc

 225 cc

B 125 Hours
C 50 Hours
A 500 Hours
B 250 Hours
C 125 Hours
A 1000 Hours
B 500 Hours
C 250 Hours

5

Section 1 — General Information

Air-cooled Generators

1.5 THE GENERATOR

Figure 1.1 – 8kW, Single Cylinder, GH-410 Engine

(door removed)

Circuit

Breaker

Air Filter

Fuel Inlet

(back)

Fuel

Regulator

Exhaust

Enclosure

Oil

Dipstick

Composite Base Oil Filter Battery Compartment

Data Label

(see sample)

Control

Panel

Figure 1.2 – 10kW, V-twin, GT-530 Engine

(door removed)

Oil

Dipstick

Exhaust

Enclosure

Composite Base Oil Filter Battery Compartment

Data Label

(see sample)

Control

Panel

Circuit

Breaker

Air

Filter

Fuel Inlet

(back)

Fuel

Regulator

Exhaust

Enclosure

Figure 1.3 – 14, 17 and 20kW, V-twin,

GT-990/GT-999 Engine (door removed)

Data Label

Oil

Dipstick

Composite Base Oil Filter Battery Compartment

(see sample)

Air Filter

Control

Panel

Circuit Breakers

(All 17 & 20kW)

Fuel Inlet

Data Label Sample

GFCI Outlet

(back)

Fuel

Regulator

6

Section 1 — General Information

Air-cooled Generators

1.6 SPECIFICATIONS

1.6.1 GENERATOR 

Model 8kW 10kW 14kW 17kW 20kW

Rated Maximum
Power Capacity (Watts*)

Rated Voltage 120/240
Rated Maximum Load Current (Amps)
120 Volts** (NG/LP) 58.3/66.6 75.0/83.3 108.3/116.6 133.3/141.6 150.0/166.6
240 Volts (NG/LP) 29.2/33.3 37.5/41.6 54.2/58.3 66.6/70.8 75.0/83.3
Main Circuit Breaker 35 Amp 45 Amp 60 Amp 65 Amp 100 Amp
Phase 1
Number of Rotor Poles 2
Rated AC Frequency 60 Hz

Battery Requirement

Weight (unit only in lbs.) 340 387 439 455/421 450
Enclosure Steel Steel Steel Steel/Aluminum Aluminum
Normal Operating Range -20° F (-28.8° C) to 77° F (25° C)
* Maximum wattage and current are subject to and limited by such factors as fuel Btu content, ambient temperature, altitude, engine power and condition, etc. Maximum power decreases about 3.5

percent for each 1,000 feet above sea level; and also will decrease about 1 percent for each 6 C (10 F) above 16 C (60 F) ambient temperature.
** Load current values shown for 120 volts are maximum TOTAL values for two separate circuits. The maximum current in each circuit must not exceed the value stated for the 240 volts.
*** Circuits to be moved must be protected by same size breaker. For example, a 15 amp circuit in the main panel must be a 15 amp circuit in the transfer switch.

7,000 NG
8,000 LP

Group 26R, 12 Volts and

350 CCA Minimum

9,000 NG

10,000 LP

13,000 NG
14,000 LP

Group 26R, 12 Volts and 525 CCA Minimum

16,000 NG
17,000 LP

18,000 NG
20,000 LP

1.6.2 ENGINE 

Model 8 kW 10 kW 14/17 kW 20 kW

Type of Engine GH-410 GT-530 GT-990 GT-999
Number of Cylinders 1 2 2 2
Rated Horsepower @ 3,600 rpm 14.8 18 32 36
Displacement 410cc 530cc 992cc 999cc
Cylinder Block Aluminum w/Cast Iron Sleeve
Valve Arrangement Overhead Valves
Ignition System Solid-state w/Magneto
Recommended Spark Plug RC14YC BPR6HS RC14YC RC12YC
Spark Plug Gap 0.76 mm (0.030 inch) 0.76 mm (0.030 inch) 1.02 mm (0.040 inch) 0.76 mm (0.030 inch)
Compression Ratio 8.6:1 9.5:1 9.5:1 9.5:1

Starter 12 VDC
Oil Capacity Including Filter Approx. 1.5 Qts Approx. 1.7 Qts Approx. 1.7 Qts Approx. 1.7 Qts
Recommended Oil Filter Part # 070185F
Recommended Air Filter Part # 0G3332 Part # 0E9581 Part # 0C8127 Part # 0G5894
Operating RPM 3,600

7

Section 1 — General Information

Air-cooled Generators

1.7 SYSTEM SET LED

The “System Set” LED (single cylinder) or "Ready to Run" on the
display (v-twin) is ready when all of the following conditions are
true:

1. The AUTO/OFF/MANUAL switch is set to the AUTO position.

2. The utility voltage being supplied to the unit is being sensed
by the PCB. If the utility sense voltage is not connected to the
unit or if it is below approximately 150-160 volts AC, then the
system set light will flash rapidly (8kW). This indicates that if
the AUTO/OFF/MANUAL switch is placed in the Auto position,
the generator will star t.

3. No alarms are present, for example, low oil pressure, high
temperature, etc.

1.8 FUEL REQUIREMENTS

AND RECOMMENDATIONS

With LP gas, use only the vapor withdrawal system. This type of

system uses the vapors formed above the liquid fuel in the storage
tank.

The engine has been fitted with a fuel carburetion system that
meets the specifications of the 1997 California Air Resources
Board for tamper-proof dual fuel systems. The unit will run on
natural gas or LP gas, but it has been factory set to r un on natural
gas. Should the primary fuel need to be changed to LP gas, the
fuel system needs to be reconfigured. See the reconfiguring the
Fuel System section for instructions on reconfiguration of the fuel
system.

Recommended fuels should have a Btu content of at least 1,000
Btus per cubic foot for natural gas; or at least 2,520 Btus per
cubic foot for LP gas. Ask the fuel supplier for the Btu content of
the fuel.

Required fuel pressure for natural gas is five (5) inches to seven

(7) inches water column (0.18 to 0.25 psi); and for liquid pro­pane, 10 inches to 12 inches of water column (0.36 to 0.43 psi).
The primary regulator for the propane supply is NOT INCLUDED
with the generator.

NOTE:

All pipe sizing, construction and layout must comply
with NFPA 54 for natural gas applications and NFPA
58 for liquid propane applications. Once the genera­tor is installed, verify that the fuel pressure NEVER
drops below four (4) inches water column for natural
gas or 10 inches water column for liquid propane.

Prior to installation of the generator, the installer should consult
local fuel suppliers or the fire marshal to check codes and regula­tions for proper installation. Local codes will mandate correct rout­ing of gaseous fuel line piping around gardens, shrubs and other
landscaping to prevent any damage.

Special considerations should be given when installing the unit
where local conditions include flooding, tornados, hurricanes,
ear thquakes and unstable ground for the flexibility and strength of
piping and their connections.

Use an approved pipe sealant or joint compound on all threaded
fitting.

All installed gaseous fuel piping must be purged and leak tested
prior to initial star t-up in accordance with local codes, standards
and regulations.

1.9 FUEL CONSUMPTION

Unit

7/8 kW 77 140 0.94/34 1.68/62

9/10 kW 102 156 1.25/46 1.93/70
13/14 kW 156 220 1.56/58 2.30/84
16/17 kW 183 261 1.61/59 2.57/94
18/20 kW 206 294 1.89/69 2.90/106

* Natural gas is in cubic feet per hour.
** LP is in gallons per hour/cubic feet per hour.
*** Values given are approximate.

Verify that gas meter is capable of providing enough fuel flow to
include household appliances.

1.9.1 BTU FLOW REQUIREMENTS - 

BTU flow required for each unit based on 1000 BTU per cubic
foot.

7kW — 140,000 BTU/Hour•

9kW — 156,000 BTU/Hour•

13kW — 220,000 BTU/Hour•

18kW — 294,000 BTU/Hour•

 Gaseous fuels such as natural gas and liquid

propane (LP) gas are highly explosive. Even the
slightest spark can ignite such fuels and cause
an explosion. No leakage of fuel is permitted.
Natural gas, which is lighter than air, tends to
collect in high areas. LP gas is heavier than air
and tends to settle in low areas.

A minimum of one approved manual shut-off valve
must be installed in the gaseous fuel supply line. The
valve must be easily accessible. Local codes deter­mine the proper location.

Nat. Gas LP Vapor

1/2 Load Full Load 1/2 Load Full Load

NATURAL GAS

DANGER

NOTE:

8

Section 1 — General Information

Air-cooled Generators

1.10 RECONFIGURING THE FUEL SYSTEM

1.10.1 8 KW, 410CC ENGINE 

To reconfigure the fuel system from NG to LP, follow these steps
(Figure 1.4):

NOTE:

The primary regulator for the propane supply is NOT
INCLUDED with the generator. A fuel pressure of 10
to 12 inches of water column (0.36 to 0.43 psi) to the
fuel inlet of the generator MUST BE SUPPLIED.

1. Turn off the main gas supply (if connected).

2. Open the roof and remove the door.

3. Remove the battery (if installed).

4. Take the plastic T-handle fuel selector in the poly bag supplied
with the generator.

5. Locate the selector knob on the air box cover, behind the
yellow air filter door and power bulge. The unit comes from
the factory in the NG (Natural Gas) position. Grasping the
T-handle, insert the pin end into the hole in the selector knob
and pull out to overcome spring pressure and then twist
clockwise 90 degrees and allow the selector to return in once
aligned with the LP (Liquid Propane) position.

6. Save this tool with the Owner's Manual.

7. Install the battery, door and close the roof.

8. Reverse the procedure to convert back to natural gas.

Figure 1.4 – Fuel Selector

1.10.2 10, 14, 17 AND 20KW, V-TWIN ENGINES 

To reconfigure the fuel system from NG to LP, follow these steps:

NOTE:

The primary regulator for the propane supply is NOT
INCLUDED with the generator. A fuel pressure of 10
to 12 inches of water column (0.36 to 0.43 psi) to the
fuel inlet of the generator MUST BE SUPPLIED.

1. Open the roof.

2. For 10kW units: Loosen clamp and slide back the air inlet
hose.

Slide fuel selector on carburetor out towards the back of the •
enclosure (Figures 1.5 and 1.6).

Return the inlet hose and tighten clamp securely.•

For 14, 17 and 20kW units: remove the air cleaner cover.

Slide the selector lever out towards the back of the enclosure •
(Figures 1.7 and 1.8).

Return the air cleaner cover and tighten the two thumb •
screws.

Figure 1.5 - 10kW, GT-530 (Inlet Hose Slid Back)

Fuel Selection

Lever - "In"
Position for

Natural Gas

Fuel

NOTE:

Use an approved pipe sealant or joint compound on
all threaded fittings to reduce the possibility of leak­age.

Figure 1.6 - 10kW, GT-530 (Inlet Hose Slid Back)

Fuel Selection

Lever - "Out"

Position for

Liquid Propane

(Vapor) Fuel

9

Section 1 — General Information

Air-cooled Generators

3. Close the roof.

4. Reverse the procedure to convert back to natural gas.

Figure 1.7 - 14, 17, & 20kW,

GT-990/GT-999 (Airbox Cover Removed)

Fuel Selection Lever - "In" Position for Natural Gas Fuel

Figure 1.8 - 14, 17, & 20kW,

GT-990/GT-999 (Airbox Cover Removed)

Fuel Selection Lever - "Out" Position for Liquid Propane

(Vapor) Fuel

Allow sufficient room on all sides of the generator for mainte-•

nance and servicing. This unit must be installed in accordance
with current applicable NFPA 37 and NFPA 70 standards; as
well as any other federal, state and local codes for minimum
distances from other structures. DO NOT install under wooden
decks or structures unless there is at least four (4) feet of clear­ance above the generator, three (3) feet of clearance on sides
and front, and 18 inches of clearance at back of unit.

Install the unit where rain gutter down spouts, roof run-off, •

landscape irrigation, water sprinklers or sump pump discharge
does not flood the unit or spray the enclosure, including any air
inlet or outlet openings.

Install the unit where services will not be affected or obstructed, •

including concealed, underground or covered services such as
electrical, fuel, phone, air conditioning or irrigation.

Where strong prevailing winds blow from one direction, face the •

generator air inlet openings to the prevailing winds.

Figure 1.9 – Generator Clearances

1.11 LOCATION

1.11.1 GENERATOR 

Install the generator set, in its protective enclosure, outdoors,
where adequate cooling and ventilating air is always available
(Figure 1.9). Consider these factors:

The installation of the generator • must comply strictly with

NFPA 37, NFPA 54, NFPA 58, and NFPA 70 standards.

Install the unit where air inlet and outlet openings will not •

become obstructed by leaves, grass, snow, etc.. If prevailing
winds will cause blowing or drifting, consider using a wind­break to protect the unit.

Install the generator on high ground where water levels will not •

rise and endanger it.

10

Install the generator as close as possible to the fuel supply, to •

reduce the length of piping.

Install the generator as close as possible to the transfer switch. •

REMEMBER THAT LAWS OR CODES MAY REGULATE THE
DISTANCE AND LOCATION.

The genset must be installed on a level surface. The base frame •

must be level within two (2) inches all around.

The generator is typically placed on pea gravel or crushed •

stone. Check local codes if a concrete slab is required. If a
concrete base slab is required, all federal, state and local codes
should be followed. Special attention should be given to the
concrete base slab which should exceed the length and width
of the generator by a minimum of six (6) inches (0.152 meters)
on all sides.

DANGER

The engine exhaust fumes contain carbon mon-



oxide, which can be DEADLY. This dangerous
gas, if breathed in sufficient concentrations,
can cause unconsciousness or even death. This
generator must be installed properly, in strict
compliance with applicable codes and stan­dards. Following installation, do nothing that
might render the system unsafe or in noncom­pliance with such codes and standards.

• Operate the generator outdoors ONLY.

• Keep exhaust gases from entering a confined
area through windows, doors, ventilation, crawl
spaces or other openings (Figure 1.9).

• Generac Power Systems as a responsible manu­facturer highly recommends that carbon monox­ide detector(s) be installed indoors according to
the manufacturer's instructions/recommendations.

• The generator must me mounted safely per appli­cable codes and the manufacturer's specifica­tions. Do NOT alter or add to the exhaust system,
or do anything that might render the exhaust sys­tem unsafe or in noncompliance with applicable
codes and standards.

1.11.2 INSTALLATION GUIDELINES FOR EATON 
STATIONARY AIR-COOLED 8, 10, 14, 17 AND
20 KW GENERATORS.

The National Fire Protection Association has a standard for the
installation and use of stationary combustion engines. That
standard is NFPA 37 and its requirements limit the spacing of an
enclosed generator set from a structure or wall (Figure 1.10).

NFPA 37, Section 4.1.4, Engines Located Outdoors. Engines, and
their weatherproof housings if provided, that are installed outdoors
shall be located at least 5 ft. from openings in walls and at least 5
ft. from str uctures having combustible walls. A minimum separa­tion shall not be required where the following conditions exist:

1. The adjacent wall of the structure has a fire resistance rating
of at least 1 hour.

2. The weatherproof enclosure is constructed of noncombus­tible materials and it has been demonstrated that a fire within
the enclosure will not ignite combustible materials outside the
enclosure.

Annex A — Explanatory Material
A4.1.4 (2) Means of demonstrating compliance are by means

of full scale fire test or by calculation procedures.

Section 1 — General Information

Air-cooled Generators

Because of the limited spaces that are frequently available for
installation, it has become apparent that exception (2) would be
beneficial for many residential and commercial installations. With
that in mind, the manufacturer contracted with an independent
testing laboratory to run full scale fire tests to assure that the
Eaton enclosure would not ignite combustible materials outside
the enclosure.

The criteria was to determine the worst case fire scenario within
the generator and to determine the ignitability of items outside
the engine enclosure at various distances. The Eaton enclosure
is constructed of non-combustible materials and the results and
conclusions from the independent testing lab indicated that any
fire within the generator enclosure would not pose any ignition risk
to nearby combustibles or structures, with or without fire ser vice
personnel response.

Based on this testing and the requirements of NFPA 37, Sec 4.1.4,
the guidelines for installation of the generators listed above are
changed to 18 inches (457mm) from the back side of the genera­tor to a stationary wall or building. For adequate maintenance and
airflow clearance, the area above the generator should be at least
4 feet with a minimum of 3 feet at the front and ends of the enclo­sure. This would include trees, shrubs and vegetation that could
obstruct air flow. See the diagram on the reverse of this page and
the installation drawing within the owner’s manual for details.

Generator exhaust contains DEADLY carbon monoxide gas. This
dangerous gas can cause unconsciousness or death. Do not place
the unit near windows, doors, fresh air intakes (furnaces, etc.) or
any openings in the building or structure, including windows and
doors of an attached garage.

11

Section 1 — General Information

Air-cooled Generators

Figure 1.10 – Installation Guidelines

No windows or openings in the wall permitted

within 5 feet from any point of the generator.

60 inches 60 inches

36 inches

These guidelines are based upon fire
testing of the generator enclosure and
the manufacturer’s requirement for air
flow for proper operation. Local codes
may be different and more restrictive
than what is described here.

Existing Wall

18 inches

Minimum Distance

Top of Generator

36 inches

Clearance from windows,

36 inches

Clearance from the ends and front of the
generator should be 36 inches. This
would include shrubs, trees and any
kind of vegetation. Clearance at the top
should be a minimum of 48 inches from
any structure, overhang or projections
from the wall. The generator should not
be placed under a deck or other
structure that is closed in and would limit
or contain air flow.

doors, any openings in the
wall, shrubs or vegetation
over 12” in height

48” Minimum

Generator

This drawing supersedes installation instructions in all Carrier air-cooled installation and owner’s manuals dated
previous to May 26, 2007.

12

60” Recommended

Minimum From Ends

18 inches

Minimum

Section 1 — General Information

Air-cooled Generators

1.12 BATTERY REQUIREMENTS

See the Specifications section for correct battery size and rating

If the AUTO/OFF/MANUAL switch is not set to its



OFF position, the generator can crank and start
as soon as the battery cables are connected. If
the utility power supply is not turned off, spark­ing can occur at the battery posts and cause an
explosion.

1.13 BATTERY INSTALLATION

Fill the battery with the proper electrolyte fluid if necessar y and
have the battery fully charged before installing it.

Before installing and connecting the battery, complete the follow­ing steps:

1. Set the generator's AUTO/OFF/MANUAL switch to OFF.

2. Turn off utility power supply to the transfer switch.

3. Remove the 7.5A fuse from the generator control panel.

Battery cables were factory connected at the generator (Figure

1.11). Connect cables to battery posts as follows:

4. Connect the red battery cable (from star ter contactor) to the
battery post indicated by a positive, POS or (+).

5. Connect the black batter y cable (from frame ground) to the
battery post indicated by a negative, NEG or (—).

Figure 1.11 – Battery Cable Connections

NOTE:

Dielectric grease should be used on battery posts to
aid in the prevention of corrosion.

NOTE:

Damage will result if battery connections are made
in reverse.

NOTE:
In areas where temperatures regularly fall below 10°
F (-12° C) it is recommended that a pad type battery
heater be installed to aid in cold climate starting.

1.14 THE BATTERY

DANGER

Do not dispose of the battery in a fire. The



battery is capable of exploding.

A battery presents a risk of electrical shock



and high short circuit current. The following pre­cautions are to be observed when working on
batteries:

• Remove the 7.5A fuse from the generator control

panel.

• Remove watches, rings or other metal objects;

• Use tools with insulated handles;

• Wear rubber gloves and boots;

• Do not lay tools or metal parts on top of the

battery; and

• Disconnect charging source prior to connecting or

disconnecting battery terminals.

Do not open or mutilate the battery. Released



electrolyte has been known to be harmful to the
skin and eyes, and to be toxic.

The electrolyte is a dilute sulfuric acid that is



harmful to the skin and eyes. It is electrically
conductive and corrosive.

The following procedures are to be observed:

• Wear full eye protection and protective clothing;

• Where electrolyte contacts the skin, wash it off

immediately with water;

• Where electrolyte contacts the eyes, flush thor-

oughly and immediately with water and seek medi­cal attention; and

• Spilled electrolyte is to be washed down with an

acid neutralizing agent. A common practice is to
use a solution of 1 pound (500 grams) bicarbonate
of soda to 1 gallon (4 liters) of water. The bicar­bonate of soda solution is to be added until the
evidence of reaction (foaming) has ceased. The
resulting liquid is to be flushed with water and the
area dried.

Lead-acid batteries present a risk of fire



because they generate hydrogen gas. The fol­lowing
procedures are to be followed:

• DO NOT SMOKE when near the battery;

• DO NOT cause flame or spark in battery area; and

• Discharge static electricity from body before

touching the battery by first touching a grounded
metal surface.

13

DANGER

Section 2 — Post Installation Start-up and Adjustments

Air-cooled Generators

Be sure the AUTO/OFF/MANUAL switch is set to



the OFF position before connecting the battery
cables. If the switch is set to AUTO or MANUAL,
the generator can crank and start as soon as
the battery cables are connected.

Be sure the utility power supply is turned off



and the 7.5A fuse is removed from the generator
control panel, or sparking may occur at the bat­tery posts as the cables are attached and cause
an explosion.

Servicing of the batter y is to be per formed or supervised by per­sonnel knowledgeable of batteries and the required precautions.
Keep unauthorized personnel away from batteries.

See the Specifications section for the correct size and rating when
replacing the battery. Have these procedures performed at the
intervals specified in the “Ser vice Schedule.” A negative ground
system is used. Battery connections are shown on the wiring dia­grams. Make sure the battery is correctly connected and terminals
are tight. Observe batter y polarity when connecting the battery to
the generator set.

1.15 BATTERY CHARGER

NOTE:

These generators DO NOT contain an internal battery
charger.

NOTE:

The manufacturer provides a battery trickle charger
that is active when the unit is set up for automatic
operation. With the battery installed and utility power
source voltage available to the transfer switch, the
battery receives a trickle charge to prevent self­discharge. The trickle charger is designed to help
extend the life of the battery by maintaining the bat­tery. The trickle charge feature cannot be used to
recharge a discharged battery.

A separate battery charger module is included with the generator.
(For battery charger installation, see the Generator Install Guidelines

included with the unit.)

2.1 BEFORE INITIAL START-UP

NOTE:

These units have been run and tested at the factory
prior to being shipped and do not require any type
of break-in.

Before star ting, complete the following:

1. Set the generator’s main circuit breaker to its OFF (or OPEN)
position.

2. Set the generator's AUTO/OFF/MANUAL switch to the OFF
position.

3. Tur n OFF all loads connected to the transfer switch terminals
T1 and T2.

4. Check the engine crankcase oil level and, if necessary, fill to
the dipstick FULL mark with the recommended oil. Do not fill
above the FULL mark.

14

5. Check the fuel supply. Gaseous fuel lines must have been
properly purged and leak tested in accordance with applicable
fuel-gas codes. All fuel shutoff valves in the fuel supply lines
must be open.

During initial star t up only, the generator may exceed the normal
number of start attempts and experience an “over crank” fault (See
the "Overcrank" section). This is due to accumulated air in the fuel
system during installation. Reset the control board and restart up
to two more times, if necessary. If unit fails to start, contact the
local dealer for assistance.

Never operate the engine with the oil level



below the “Add” mark on the dipstick. Doing this
could damage the engine.

2.2 ELECTRICAL CHECKS

Complete electrical checks as follows:

1. Set the generator's main circuit breaker to its OFF (or OPEN)
position.

2. Set the generator's AUTO/OFF/MANUAL switch to the OFF
position.

3. Tur n OFF all loads connected to the transfer switch terminals
T1 and T2.

4. Turn on the utility power supply to the transfer switch using
the means provided (such as a utility main line circuit break­er).

DANGER

The transfer switch is now electrically “hot.”



Contact with “hot” parts will result in extremely
hazardous and possibly fatal electrical shock.
Proceed with caution.

5. Use an accurate AC voltmeter to check utility power source
voltage across transfer switch terminals N1 and N2. Nominal
line-to-line voltage should be 240 volts AC.

6. Check utility power source voltage across ter minals N1 and
the transfer switch neutral lug; then across terminal N2 and
neutral. Nominal line-to-neutral voltage should be 120 volts
AC.

7. When certain that utility supply voltage is compatible with
transfer switch and load circuit ratings, turn OFF the utility
power supply to the transfer switch.

8. On the generator panel, set the Auto/Off/ Manual switch to
MANUAL. The engine should crank and start.

9. Let the engine warm up for about five minutes to allow inter­nal temperatures to stabilize. Then, set the generator’s main
circuit breaker to its ON (or closed) position.

Proceed with caution! Generator power voltage



is now supplied to the transfer switch. Contact
with live transfer switch parts will result in dan­gerous and possibly fatal electrical shock.

Section 2 — Post Installation Start-up and Adjustments

Air-cooled Generators

10. Connect an accurate AC voltmeter and a frequency meter
across transfer switch terminal lugs E1 and E2. 8kW voltage
should be 230-240 volts at a frequency of 61-63 Her tz. 14,
17 and 20kW voltage should be 247-249 at a frequency of

59.5-60.5 Her tz. 10kW voltage should be 220-230 volts at a
frequency of 59.5-60.5 Her tz.

11. Connect the AC voltmeter test leads across terminal lugs E1
and neutral; then across E2 and neutral. In both cases, volt­age reading should be 121-126 volts AC (8kW), and 125-126
volts AC (10, 14, 17 and 20kW).

12. Set the generator ’s main circuit breaker to its OFF (or OPEN)
position. Let the engine run at no-load for a few minutes to
stabilize internal engine generator temperatures.

13. Set the generator's AUTO/OFF/MANUAL switch to OFF. The
engine should shut down.

NOTE:

It is important not to proceed until certain that gener­ator AC voltage and frequency are correct and within
the stated limits. Generally, if both AC frequency and
voltage are high or low, the engine governor requires
adjustment* (*GH410 only). If frequency is correct,
but voltage is high or low, the generator’s voltage
regulator requires adjustment.

2.3 GENERATOR TESTS UNDER LOAD

To test the generator set with electrical loads applied, proceed as
follows:

1. Set generator’s main circuit breaker to its OFF (or OPEN) posi­tion.

2. Tur n OFF all loads connected to the transfer switch terminals
T1 and T2.

3. Set the generator's AUTO/OFF/MANUAL switch to OFF.

4. Turn OFF the utility power supply to the transfer switch,
using the means provided (such as a utility main line circuit
breaker).

Do not attempt manual transfer switch operation



until all power voltage supplies to the transfer
switch have been positively turned off. Failure to
turn off all power voltage supplies will result in
extremely hazardous and possibly fatal electri­cal shock.

5. Manually set the transfer switch to the STANDBY position, i.e.,
load terminals connected to the generator's E1/E2 terminals.
The transfer switch operating lever should be down.

6. Set the generator's AUTO/OFF/MANUAL switch to MANUAL.
The engine should crank and star t immediately.

7. Let the engine stabilize and warm up for a few minutes.

8. Set the generator’s main circuit breaker to its ON (or CLOSED)
position. Loads are now powered by the standby generator.

9. Turn ON the load center fed by the transfer switch (T1 and
T2).

10. Connect an accurate AC voltmeter and a frequency meter
across terminal lugs E1 and E2.

8kW voltage should be greater than 230 volts and frequency •
should be greater than 58 Hz.

10, • 14, 17 and 20kW voltage should be greater than 240 volts
and frequency should be 60 Hz.

11. Let the generator run at full rated load for 20-30 minutes.
Listen for unusual noises, vibration or other indications of
abnormal operation. Check for oil leaks, evidence of overheat­ing, etc.

12. When testing under load is complete, turn OFF electrical
loads.

13. Set the generator's main circuit breaker to its OFF (or OPEN)
position.

14. Let the engine run at no-load for a few minutes.

15. Set the AUTO/OFF/MANUAL switch to OFF. The engine should
shut down.

2.4 CHECKING AUTOMATIC OPERATION

To check the system for proper automatic operation, proceed as
follows:

1. Set generator’s main circuit breaker to its OFF (or OPEN) posi­tion.

2. Check that the AUTO/OFF/MANUAL switch is set to OFF.

3. Turn OFF the utility power supply to the transfer switch, using
means provided (such as a utility main line circuit breaker).

4. Manually set the transfer switch to the UTILITY position, i.e.,
load terminals connected to the utility power source side.

5. Turn ON the utility power supply to the transfer switch,
using the means provided (such as a utility main line circuit
breaker).

6. Set the generator's main circuit breaker to its ON (or CLOSED)
position.

7. Set the AUTO/OFF/MANUAL switch to AUTO. The system is
now ready for automatic operation.

8. Turn OFF the utility power supply to the transfer switch.

With the AUTO/OFF/MANUAL switch at AUTO, the engine should
crank and start when the utility source power is turned OFF after a
10 second delay . After starting, the transfer switch should connect
load circuits to the standby side after a 20 to 50 second selectable
delay. Let the system go through its entire automatic sequence of
operation.

With the generator running and loads powered by generator AC
output, turn ON the utility power supply to the transfer switch. The
following should occur:

After about 10 seconds, the switch should transfer loads back •

to the utility power source.

About one minute after re-transfer, the engine should shut •

down.

•

15

GOVERNOR

SHAFT

PRIMARY

ADJUST

SCREW

GOVERNOR

CLAMP

BOLT

SECONDARY

ADJUST SCREW

Section 2 — Post Installation Start-up and Adjustments

Air-cooled Generators

2.5 ENGINE GOVERNOR ADJUSTMENT

If both AC frequency and voltage are correspondingly high or low,
adjust the engine governor as follows:

2.5.1 8 KW UNITS 

The engine must be OFF to perform steps 1 and



2.

1. Loosen the governor clamp bolt (Figure 2.1).

2. Hold the governor lever at its wide open throttle position
(clockwise), and rotate the governor shaft clockwise as far
as it will go. Then, tighten the governor lever clamp bolt to 70
inch-pounds (8 N-m).

3. Start the generator ; let it stabilize and war m up at no-load.

4. Connect a frequency meter across the generators AC output
leads.

Figure 2.1 — Engine Governor Adjustment

Single Cylinder Engines

2.5.3 ADDITIONAL CORROSION 
PROTECTION

Periodically spray all engine linkage parts and brackets with corro­sion inhibiting spray such as WD-40 or a comparable product.

2.6 VOLTAGE REGULATOR
ADJUSTMENT

2.6.1 8 & 10KW UNITS 

Due to the brushless design of these two alternators, no voltage
regulator is used and therefore no voltage adjustment is required.

2.6.2  14, 17 & 20KW UNITS

With the frequency between 59.5 -60.5 Her tz at no-load, slowly
turn the slotted potentiometer (Figure 2.2) until line voltage reads
247-249 volts.

Figure 2.2 – Voltage Adjustment Potentiometer

5. Turn the primar y adjust screw to obtain a frequency reading
of 61.5 Her tz. Turn the secondar y adjust screw to obtain a
frequency of 62.5 Hz.

2.5.2 10, 14, 17 & 20KW UNITS 

All V-twin units DO NOT require an engine governor
adjustment due to their design.

NOTE:

Tu r n t o

adjust voltage.

NOTE:

The access panel on top of the control panel must be
removed to adjust the voltage regulator.

NOTE:

The voltage regulator is housed behind the genera­tor's control panel. The regulator maintains a voltage
in direct proportion to frequency at a 2-to-1 ratio. For
example, at 60 Hertz, line-to-neutral voltage will be
124 volts.

16

Section 3 — Operation

Air-cooled Generators

3.1 CONTROL PANEL INTERFACE

3.1.1 USING THE AUTO/OFF/MANUAL SWITCH 

(FIGURES 3.1 & 3.2)

1. “AUTO” Position – Selecting this switch activates fully auto­matic system operation. It also allows the unit to automati­cally star t and exercise the engine ever y seven days with the
setting of the exercise timer (see the Setting the Exercise
Timer section).

2. “OFF” Position – This switch position shuts down the engine.
This position also prevents automatic operation.

3. “MANUAL” Position – Set the switch to MANUAL to crank
and start the engine. Transfer to standby power will not occur
unless there is a utility failure.

Figure 3.1 – 8kW Generator Control Panel

SYSTEM READY

LOW BATTERY

LOW OIL PRESSURE

HIGH OIL TEMPERATURE

OVERSPEED

RPM SENSOR LOSS

OVERCRANK

With the switch set to AUTO, the engine may



crank and start at any time without warning.
Such automatic starting occurs when utility
power source voltage droops below a preset
level or during the normal exercise cycle. To
prevent possible injury that might be caused
by such sudden starts, always set the switch to
OFF and remove the fuses before working on or
around the generator or transfer switch. Then,
place a “DO NOT OPERATE” tag on the genera­tor panel and on the transfer switch.

SET

EXERCISE

Figure 3.2 – 10/14/17 & 20kW Generator Control

Panel

ECS

ENTER

3.1.2 SET TING THE EXERCISE TIMER 

This generator is equipped with an exercise timer. Once it is set,
the generator will star t and exercise ever y seven days, on the day
of the week and at the time of day specified. During this exercise
period, the unit runs for approximately 12 minutes and then shuts
down. Transfer of loads to the generator output does not occur
during the exercise cycle unless utility power is lost.

8kW 

A switch on the control panel (see Figure 3.1) permits selection of
the day and time for the system to exercise. At the chosen time,
perform the following sequence to select the desired day and time
of day the system will exercise. Remember seasonal time changes
affect the exercise settings.

1. Verify that the AUTO/OFF/MANUAL switch is set to AUTO.

2. Press and hold the “Set Exercise” switch for several seconds.
All the red LED’s will stop flashing immediately and the gen­erator will star t.

3. The generator will start and run for approximately 12 minutes
and then shut down. The exerciser is now set to run at this
time of day each week.

Example: If the “Set Exercise” pressed on Saturday afternoon at
2:00 p.m., the generator will star t and exercise for approximately
12 minutes every Saturday at 2:00 p.m.

NOTE:

The exerciser will only work in the AUTO mode and
will not work unless this procedure is performed.
The exerciser will need to be reset every time the 12
volt battery is disconnected and then reconnected,
and when the fuse is removed and/or replaced.

17

Section 3 — Operation

Air-cooled Generators

10 to 20 KW - INSTALLATION ASSISTANT 

Upon first power up of the generator, the display inter face will
begin an installation assistant. The assistant will prompt the user
to set the minimum settings to operate. These settings are sim­ply: Current Date/Time and Exercise Day/Time. The maintenance
intervals will be initialized when the exercise time is entered (Figure

3.2).
The exercise settings can be changed at any time via the "EDIT"

menu (see Appendix, "Menu System").
If the 12 volt battery is disconnected or the fuse removed, the

Installation Assistant will operate upon power restoration. The
only difference is the display will only prompt the customer for the
current Time and Date.

IF THE INSTALLER TESTS THE GENERATOR PRIOR
TO INSTALLATION, PRESS THE “ENTER” KEY TO
AVOID SETTING UP THE EXERCISE TIME. THIS WILL
ENSURE THAT WHEN THE CUSTOMER POWERS UP
THE UNIT, HE WILL STILL BE PROMPTED TO ENTER
AN EXERCISE TIME.

NOTE:

The exerciser will only work in the AUTO mode and
will not work unless this procedure is performed.
The current date/time will need to be reset every time
the 12 volt battery is disconnected and then recon­nected, and/or when the fuse is removed.

3.1.3 DISPLAY INTERFACE 

8 kW LED Display 

Seven (7) LED’s are provided for user status indications. The LED
functions are:

1. System Ready (green)

2. Low Battery (red)

3. Low Oil Pressure (red)

4. High Oil Temperature (red)

5. Over Speed (red)

6. RPM Sensor Loss (red)

7. Over Crank (red)
See the Protection Systems section for details.

10 to 20KW DISPLAY INTERFACE MENUS 

The LCD display is organized as detailed below:

The “Home” page, this page is the default page which will be •

displayed if no keys are pressed for 30 seconds. This page
normally shows the current Status message and the current
date and time. The highest priority active Alarm and/or Warning
will be automatically posted on this page as well as flashing
the backlight when such an event is detected. In the case of
multiple Alarms or Warnings, only the first message will be
displayed. To clear an Alarm or Warning, see the Protection
Systems section - Clear Alarm.

The display backlight is normally off. If the user presses any •

key, the backlight will come on automatically and remain on for
30 seconds after the last key was pressed.

18

The “Main Menu” page will allow the user to navigate to all other •

pages or sub-menus by using the Left/Right and Enter keys.
This page can be accessed at any time with several presses of
the dedicated Escape key. Each press of the Escape key takes
you back to the previous menu until the main menu is reached.
This page displays the following options: HISTORY; STATUS;
EDIT; AND DEBUG. (See the Appendix - "Menu System".)

3.2 AUTOMATIC TRANSFER OPERATION

To select automatic operation, do the following:

1. Make sure the transfer switch main contacts are set to their
UTILITY position, i.e., loads connected to the utility power
source (Figure 3.2).

2. Be sure that normal UTILITY power source voltage is avail­able to transfer switch terminal lugs N1 and N2 (Refer to the
Electrical Data section).

3. Set the generator’s AUTO/OFF/MANUAL switch to AUTO.

4. Set the generator’s main circuit breaker to its ON (or CLOSED)
position.

With the preceding steps complete, the generator will star t auto­matically when utility source voltage drops below a preset level.
After the unit star ts, loads are transferred to the standby power
source. Refer to the Sequence of Automatic Operation section.

3.3 SEQUENCE OF AUTOMATIC OPERATION

3.3.1 UTILITY FAILURE 

Initial Conditions: Generator in Auto, ready to run, load being sup­plied by utility source. When utility fails (below 70% of nominal),
a 10 second line interrupt delay time is started. If the utility is still
gone when the timer expires, the engine will crank and star t. Once
started, a 20 to 50 second selectable engine warm-up timer will be
initiated. When the warm-up timer expires, the control will transfer
the load to the generator. If the utility power is restored (above 80%
of nominal) at any time from the initiation of the engine star t until
the generator is ready to accept load (and the warm-up time has
not elapsed), the controller will complete the star t cycle and run
the generator through its normal cool down cycle; however, the
load will remain on the utility source.

3.3.2 CRANKING 

The system will control the cyclic cranking as follows: 16 second
crank, seven (7) second rest, 16 second crank, seven (7) second
rest followed by three (3) additional cycles of seven (7) second
cranks followed by seven (7) second rests.

Choke Operation 

1. The 990/999cc engines have an electric choke in the air
box that is automatically controlled by the electronic control
board.

2. The 530cc engines have an electric choke on the divider panel
air inlet hose that is automatically controlled by the electronic
control board.

3. The 410cc engines have a choke behind the air box that is
automatically controlled by the electronic control board.

Section 3 — Operation

Air-cooled Generators

Failure to Start 

This is defined as any of the following occurrences during crank­ing.

1. Not reaching starter dropout within the specified crank cycle.
Star ter dropout is defined as four (4) cycles at 1,000 RPM.

2. Reaching star ter dropout, but then not reaching 2200 RPM
within 15 seconds. In this case the control board will go into
a rest cycle for seven (7) seconds, then continue the rest of
the crank cycle.

During a rest cycle the start and fuel outputs are de-energized and
the magneto output is shor ted to ground.

Cranking Conditions 

The following notes apply during cranking cycle.

1. Star ter motor will not engage within five (5) seconds of the
engine shutting down.

2. The fuel output will not be energized with the starter.

3. The starter and magneto outputs will be energized together.

4. Once the starter is energized the control board will begin look­ing for engine rotation. If it does not see an RPM signal within
three (3) seconds it will shut down and latch out on RPM
sensor loss.

5. Once the control board sees an RPM signal it will energize the
fuel solenoid, drive the throttle open and continue the crank
sequence.

6. Starter motor will disengage when speed reaches starter
dropout.

7. If the generator does not reach 2200 RPM within 15 seconds,
re-crank cycle will occur.

8. If engine stops turning between starter dropout and 2200
RPM, the board will go into a rest cycle for seven (7) seconds
then re-crank (if additional crank cycles exist).

9. Once started, the generator will wait for a hold-off period
before starting to monitor oil pressure and oil temperature
(refer to the Alarm Messages section for hold-off times).

10. During Manual star t cranking, if the Mode switch is moved
from the Manual position, the cranking stops immediately.

11. During Auto mode cranking, if the Utility returns, the cranking
cycle does NOT abor t but continues until complete. Once the
engine star ts, it will r un for one (1) minute, then shut down.

3.3.3 LOAD TRANSFER 

The transfer of load when the generator is running is dependent
upon the operating mode as follows:

1. Manual

Will not transfer to generator if utility is present.•
Will transfer to generator if utility fails (below 70% of nominal •

for 20 or 50 consecutive seconds.
Will transfer back when utility returns for 10 consecutive •

seconds. The engine will continue to run until removed from
the Manual mode.

2. Auto
Will star t and r un if Utility fails for 10 consecutive seconds.•
Will start a 20 to 50 second selectable engine warm-up •

timer.
Will not transfer if utility subsequently returns.•
Will transfer to generator if utility is still not present.•
Will transfer back to utility once utility returns (above 80% of •

nominal) for 10 seconds.
Will transfer back to utility (IF available) if the generator is shut •

down for any reason (such as the switch is in the OFF posi­tion) or a shutdown alarm and the utility source is available.

After transfer, will shut down engine after one (1) minute •
cool-down time.

3. Exercise
Will not exercise if generator is already running in either Auto •

or Manual mode.
During exercise, the controller will only transfer if utility fails •

during exercise for 10 seconds, and will switch to Auto
mode.

3.3.4 UTILITY RESTORED 

Initial Condition: Generator supplying power to customer load.
When the utility returns (above 80% of nominal), a 10 second
return to utility timer will star t. At the completion of this timer, if
the utility supply is still present and acceptable, the control will
transfer the load back to the utility and run the engine through a
one (1) minute cool down period and then shut down. If utility fails
during this cool down period, the control will transfer load back
to the generator and continue to run while monitoring for utility to
return.

3.4 MANUAL TRANSFER OPERATION

3.4.1 TRANSFER TO GENERATOR POWER SOURCE 

To star t the generator and activate the transfer switch manually,
proceed as follows:

1. Set the generator’s AUTO/OFF/MANUAL switch to OFF.

2. Set the generator’s main circuit breaker to its OFF (or OPEN)

position.

3. Turn OFF the utility power supply to the transfer switch

using the means provided (such as a utility main line circuit
breaker).

DANGER

Do not attempt to activate the transfer switch



manually until all power voltage supplies to the
switch have been positively turned off. Failure to
turn off all power voltage supplies may result in
extremely hazardous and possibly fatal electri­cal shock.

4. Use the manual transfer handle inside the transfer switch to

move the main contacts to their STANDBY position, i.e., loads
connected to the standby power source (Figure 3.3).

19

DANGER

Section 3 — Operation

Air-cooled Generators

5. To crank and star t the engine, set the AUTO/OFF/MANUAL
switch to MANUAL.

6. Let the engine stabilize and warm up for a few minutes.

7. Set the generator’s main circuit breaker to its ON (or CLOSED)
position. The standby power source now powers the loads.

Figure 3.3 – Manual Transfer Switch Operation

3.4.2 TRANSFER BACK TO UTILITY POWER 

SOURCE

When utility power has been restored, transfer back to that source
and shut down the generator. This can be accomplished as fol­lows:

1. Set the generator’s main circuit breaker to its OFF (or OPEN)
position.

2. Let the engine run for a minute or two at no-load to stabilize
the internal temperatures.

3. Set the generator’s AUTO/OFF/MANUAL switch to its OFF (or
OPEN) position. The engine should shut down.

4. Check that utility power supply to the transfer switch is turned
OFF.

3.5 SIDE COMPARTMENT (V-TWIN ONLY)

(FIGURES 3.4 & 3.5)

Local codes may require this compartment to be locked. A hasp is
provided so the owner can secure the compartment with their own
padlock. Check local codes in the area.

3.5.1 MAIN CIRCUIT BREAKER 

This is a 2-pole breaker rated according to the Specifications sec­tion.

3.5.2 EXTERIOR READY LIGHTS 

Green LED ‘Ready’ light (10, 14, 17 & 20 KW) is on when util-•

ity is present and switch is in AUTO indicating the generator is
ready and when the generator is running.

Red LED ‘Alarm’ light (10, 14, 17 & 20 KW) is on when the •

generator is OFF or a fault is detected. (See the Protections
Systems section.)

Yellow LED ‘Maintenance’ light (17 & 20 KW) (See the •

Protections Systems section.)

3.5.3 120 VAC GFCI OUTLET & 15 AMP BREAKER 
(17 & 20 KW ONLY)

These models are equipped with an external, 15 amp, 120 volt,
GFCI convenience outlet that is located in a compar tment on the
right side of generator (Figure 1.3).

When the generator is running, in the absence of utility power, this
outlet may also be used to power items outside your home such
as lights or power tools. This outlet may also be used when utility
power is present by running the generator in manual mode. This
outlet does not provide power if the generator is not running. This
outlet is protected by a 15 amp circuit breaker in the same com­par tment as the outlet. (Do not use when the generator is r unning
in exercise mode.)

Figure 3.4 – Side Compartment

Do not attempt to activate the transfer switch



manually until all power voltage supplies to the
switch have been positively turned off. Failure to
turn off all power voltage supplies may result in
extremely hazardous and possibly fatal electri­cal shock.

5. Use the manual transfer handle inside the transfer switch to
move the main contacts back to their UTILITY position, i.e.,
loads connected to the utility power source (Figure 3.2).

6. Turn ON the utility power supply to the transfer switch using
the means provided.

7. Set the system to automatic operation as outlined in Automatic
Transfer Operation section.

20

Section 3 — Operation

Air-cooled Generators

Figure 3.5 – Open Side Compartment

120V GFCI Outlet 15 Amp Outlet Breaker

Main Circuit BreakerLED Indicator Lights

3.6 PROTECTION SYSTEMS

3.6.1 ALARMS 

Highest Priority (Latching) Displayed on the control panel and

the external red LED (V-twins only). They must be cleared before
the alarm message goes away. The alarm log records each occur­rence (see Appendix - "Menu System").

Low Oil Pressure (Shutdown Alarm) 

A five (5) second delay on star t-up and seven (7) second delay
once the engine is running.

This switch (Figure 3.6) has normally closed contacts that are
held open by engine oil pressure during operation. Should the oil
pressure drop below the five (5) PSI range, switch contacts close
and the engine shuts down. The unit should not be restar ted until
oil level is verified.

 High Engine Temperature (Shutdown Alarm – Auto
Reset)

A 10 second delay on star t-up and one (1) second delay before
shutdown. Auto reset when the condition clears and restart the
engine if a valid star t signal is still present.

This switch’s contacts (Figure 3.6) close if the temperature should
exceed approximately 144° C (293° F), initiating an engine shut­down. Once the oil temperature drops to a safe level the switch’s
contacts open again.

Over Crank (Shutdown Alarm) 

This occurs if the engine has not started within the specified crank
cycle. (See "Cranking" section.)

Figure 3.6 – Low Oil Pressure and

High Temperature Switches

Low Oil Switch

L

o

o

s

e

Oil Filter

Oil
Drain
Hose

NOTE:

The oil drain hose may be routed in the opposite
direction as shown in figure.

High Temp Switch

n

Over Speed (Shutdown Alarm) 

4320 RPM for three (3) seconds or 4500 RPM immediately. This
feature protects the generator from damage by shutting it down
if it happens to run faster than the preset limit. This protection
also prevents the generator from supplying an output that could
potentially damage appliances connected to the generator circuit.
Contact the nearest Dealer if this failure occurs.

RPM Sense Loss (Shutdown Alarm) 

During cranking, if the Control Board does not see a valid RPM
signal within three (3) seconds, it will shut down and lock out on
RPM sense loss. While engine is running, if RPM signal is lost for
one (1) second the Control Board will shut the engine down, wait
15 seconds, then re-crank the engine. If no RPM signal is detected
within the first three (3) seconds of cranking, the Control Board
will shut the engine down and latch out on RPM sensor loss. If the
RPM signal is detected, the engine will star t and run normally. If
the RPM signal is subsequently lost again, the Control Board will
try one more re-crank attempt before latching out and displaying
the RPM sensor failure message.

Under-frequency (Shutdown Alarm) 

After starting, if the generator stays under frequency for more than
30 seconds it will shut down. The under-frequency setting is 50
Hz.

Internal Fault (Shutdown Alarm) 

This alarm cannot be cleared, call service dealer.

21

Oil Dipstick and Fill

Section 4 — Maintenance

Air-cooled Generators

CLEAR ALARM 

8kW — Clear the alarm by setting the AUTO/OFF/MANUAL •

switch to the OFF position and back to AUTO.

10 - 20kW — Clear the alarm by setting the AUTO/OFF/MANUAL •

switch to the OFF position. Press the ENTER key to unlatch any
active fault and clear the corresponding alarm message.

3.6.2 WARNINGS 

Second Priority (Non-latching) Displayed on the control panel

and the external yellow LED (V-twins only). Warnings automati­cally clear when the monitored condition goes away. Warnings are
recorded in the alarm log. Warnings cannot cause shutdowns.

Low Battery 

The Control Board monitors battery voltage and displays a warn­ing if the battery voltage falls below 11.0 volts for one (1) minute.
Warning is automatically cleared if the battery voltage rises above

11.0 volts. Battery voltage is not monitored during the crank

cycle.

Exercise Set Error 

If the exercise period becomes corrupted, a warning message
will be displayed. This message will only clear when the exercise
period is reset.

4.2 CHECKING THE ENGINE
OIL LEVEL

For oil capacities, see the Specifications section. For engine oil
recommendations, see the Engine Oil Recommendations section.

When power outages necessitate running the generator for extend­ed periods of time, the oil level should be checked daily.

To check the engine oil level, proceed as follows (Figures 4.1, 4.2
and 4.3):

1. If the generator is running during a utility outage, first turn OFF

all associated loads running in the residence. Second, turn the
generator's main circuit breaker to the OFF position.

2. Move the AUTO/OFF/MANUAL switch to the OFF position.

3. Remove the dipstick and wipe it dry with a clean cloth.

4. Completely insert the dipstick; then, remove it again. The oil

level should be at the dipstick “Full” mark. If necessary, add
oil to the “Full” mark only. DO NOT FILL ABOVE THE “FULL”
MARK.

Never operate the engine with the oil level



below the “Add” mark on the dipstick. Doing this
could damage the engine.

3.6.3 MAINTENANCE ALERTS (10 - 20KW ONLY) 

Third priority

Maintenance Message 

When a maintenance period expires, a warning message will be
displayed. (17 through 20kW models include an external yellow
LED which will illuminate.) The aler t can be reset by pressing the
Enter key, which will cause the user to be prompted to confirm
the action. Resetting will clear the alert and reset the maintenance
counters for all conditions annunciated. The history log will record
the alert. The maintenance counter will not accumulate without
battery power. Once battery power is restored, the set time prompt
will be displayed. The maintenance counters will be adjusted to the
new time and date.

NOTE:

Since most maintenance alerts will occur at the
same time (most have two (2) year intervals), only
one will appear on the display at any one time. Once
the first alert is cleared, the next active alert will be
displayed.

4.1 FUSE

The 7.5 amp fuse on the control panel protects the DC control
circuit against overload (Figures 3.1 and 3.2). This fuse is wired
in series with the battery output lead to the panel. If this fuse ele­ment has melted open, the engine will not be able to crank or start.
Replace this fuse using only an identical 7.5 amp replacement
fuse. Whenever the fuse is removed or replaced, the exercise timer
needs to be reset.

22

Figure 4.1 — Oil Dipstick and Fill, 8kW

Figure 4.2 — Oil Dipstick, 10kW

5. Install the dipstick.

Oil Dipstick

Oil Fill

SAE 30

Synthetic 5W-30

10W-30

6. Reset the AUTO/OFF/MANUAL switch to its original position.

7. If the generator was running during a utility outage, first turn
the generator's main circuit breaker back to the ON position.
Second, turn ON needed loads in the residence.

Figure 4.3 — Oil Dipstick and Fill,

14, 17 & 20kW

4.3 CHANGING THE ENGINE OIL

Hot oil may cause burns. Allow engine to cool



before draining oil. Avoid prolonged or repeated
skin exposure with used oil. Thoroughly wash
exposed areas with soap.

Section 4 — Maintenance

Air-cooled Generators

Any attempt to crank or start the engine before



it has been properly serviced with the recom­mended oil may result in an engine failure.

4.3.3 OIL & OIL FILTER CHANGE PROCEDURE 

To change the oil, proceed as follows:

1. Start the engine by moving the AUTO/OFF/MANUAL switch to
MANUAL and run until it is thoroughly warmed up. Then shut
OFF the engine by moving the switch to the OFF position.

2. Immediately after the engine shuts OFF, pull the oil drain hose
(Figure 4.4) free of its retaining clip. Remove the cap from the
hose and drain the oil into a suitable container.

3. After the oil has drained, replace the cap onto the end of the
oil drain hose. Retain the hose in the clip.

Change the engine oil filter as follows:

1. With the oil drained, remove the old oil filter by turning it
counterclockwise.

2. Apply a light coating of clean engine oil to the gasket of the
new filter. See the Specifications section for recommended
filter.

3. Screw the new filter on by hand until its gasket lightly contacts
the oil filter adapter. Then, tighten the filter an additional 3/4 to
one turn (Figure 4.4).

4. Refill with the proper recommended oil (see the Engine Oil
Recommendations section). See the Specifications section
for oil capacities.

Figure 4.4 – Oil Drain Hose and Filter

4.3.1 OIL CHANGE INTERVALS 

See the "Service Schedule" section.

4.3.2 ENGINE OIL RECOMMENDATIONS 

All oil should meet minimum American Petroleum Institute (API)
Service Class SJ, SL or better. Use no special additives. Select
the oil's viscosity grade according to the expected operating tem­perature.

SAE 30 • Î Above 32° F
10W-30 • Î Between 40° F and -10° F
Synthetic 5W-30 • Î 10° F and below

Synthetic 5W-30

10W-30

SAE 30

Low Oil Switch

L

o

o

s

e

n

High Temp Switch

Oil Filter

Oil
Drain
Hose

5. Start the engine, run for one (1) minute, and check for leaks.

6. Shutdown and recheck oil level, add as needed. DO NOT
OVER FILL.

7. Reset the AUTO/OFF/MANUAL switch to the AUTO position.

8. Dispose of used oil at a proper collection center.

23

Section 4 — Maintenance

Air-cooled Generators

NOTE:

The oil drain hose may be routed in the opposite
direction as shown in figure.

4.4 CHANGING THE ENGINE
AIR CLEANER

4.4.1 14, 17 & 20KW GENERATORS 

See "The Generator" section for the location of the air cleaner. Use
the following procedures (Figure 4.5):

1. Lift the roof and remove the door.

2. Turn the two screws counterclockwise to loosen.

3. Remove the cover and air filter.

Figure 4.5 — 14, 17 & 20kW

Engine Air Cleaner

Screw

Cover

Filter

6. Turn the worm gear clamp screw clockwise to tighten.

7. Replace door and roof.

Figure 4.6 — 10kW Engine Air Cleaner

Air Filter

4.4.3 8KW GENERATOR 

See "The Generator" section to locate the air box. Use the following
procedures to replace the dir ty air filter within the air box (Figure

4.7).

1. Lift the roof and remove the door.

2. Push back on the latch of the yellow air filter access door to
swing open.

3. Pull out the old air filter and discard appropriately.

4. Install the new filter, open end first into the air box.

5. Swing the yellow door shut and snap to close.

6. Replace door and close roof securely.

4. Wipe away dust or debris from inside of the air box and
around edges.

5. Install the new air cleaner into the air box.

6. Install the cover. Turn the two cover screws clockwise to
tighten.

See the Service Schedule section for air cleaner maintenance. See
the Specifications section for air filter replacement par t number.

4.4.2 10KW GENERATORS 

See "The Generator" section for the location of the air cleaner. Use
the following procedure (Figure 4.6):

1. Lift the roof and remove the door.

2. Turn the worm gear clamp screw counterclockwise to loos­en.

3. Pull the old filter off the divider panel hub.

4. Wipe away dust or debris from the panel hub.

5. Install the new air cleaner onto the hub.

24

Figure 4.7 — 8kW Engine Air Cleaner Location

Air Cleaner
Cover

Section 4 — Maintenance

Air-cooled Generators

4.5 SPARK PLUG(S)

Reset the spark plug(s) gap or replace the spark plug(s) as neces­sary. See the Service Schedule section for maintenance require­ments.

1. Clean the area around the base of the spark plug(s) to keep
dir t and debris out of the engine.

2. Remove the spark plug(s) and check the condition. Replace
the spark plug(s) if worn or if reuse is questionable. See the
Service Schedule section for recommended inspection. Clean
by scraping or washing using a wire brush and commercial
solvent. Do not blast the spark plug(s) to clean.

3. Check the spark plug gap using a wire feeler gauge. Adjust the
gap to 0.76 mm (0.030 inch) for 8, 10 and 20kW; and 1.02
mm (0.040 inch) for 14 and 17kW by carefully bending the
ground electrode (Figure 4.8).

Figure 4.8 – Setting the Spark Plug Gap

SET PLUG GAP AT 0.76 mm (.030 inch) - 8, 10 &

20kW; 1.02 mm (.040 inch) - 14 & 17kW

4.6 BATTERY MAINTENANCE

The battery should be inspected per the "Ser vice Schedule" sec­tion. The following procedure should be followed for inspection:

1. Inspect the battery posts and cables for tightness and corro­sion. Tighten and clean as necessary.

2. Check the battery fluid level of unsealed batteries and, if nec­essary, fill with Distilled Water Only. Do not use tap water in
batteries.

3. Have the state of charge and condition checked. This should
be done with an automotive-type battery hydrometer.

DANGER

Do not dispose of the battery in a fire. The



battery is capable of exploding.

A battery presents a risk of electrical shock



and high short circuit current. The following pre­cautions are to be observed when working on
batteries:

• Remove the 7.5A fuse from the generator control

panel.

• Remove watches, rings or other metal objects;

• Use tools with insulated handles;

• Wear rubber gloves and boots;

• Do not lay tools or metal parts on top of the

battery; and

• Disconnect charging source prior to connecting or
disconnecting battery terminals.

Do not open or mutilate the battery. Released



electrolyte has been known to be harmful to the
skin and eyes, and to be toxic.

The electrolyte is a dilute sulfuric acid that is



harmful to the skin and eyes. It is electrically
conductive and corrosive. The following
procedures are to be observed:

• Wear full eye protection and protective clothing;

• Where electrolyte contacts the skin, wash it off
immediately with water;

• Where electrolyte contacts the eyes, flush thor­oughly and immediately with water and seek medi­cal attention; and

• Spilled electrolyte is to be washed down with an
acid neutralizing agent. A common practice is to
use a solution of 1 pound (500 grams) bicarbonate
of soda to 1 gallon (4 liters) of water. The bicar­bonate of soda solution is to be added until the
evidence of reaction (foaming) has ceased. The
resulting liquid is to be flushed with water and the
area dried.

Lead-acid batteries present a risk of fire



because they generate hydrogen gas. The
following procedures are to be followed:

• DO NOT SMOKE when near the battery;

• DO NOT cause flame or spark in battery area; and

• Discharge static electricity from body before
touching the battery by first touching a grounded
metal surface.

Be sure the AUTO/OFF/MANUAL switch is set to



the OFF position before connecting the battery
cables. If the switch is set to AUTO or MANUAL,
the generator can crank and start as soon as
the battery cables are connected.

Be sure the utility power supply is turned off



and the 7.5A fuse is removed from the generator
control panel, or sparking may occur at the bat­tery posts as the cables are attached and cause
an explosion.

4.7 ADJUSTING GH-410/GT-530/

990/999 VALVE CLEARANCE

After the first six (6) months of operation, check the valve clear­ance in the engine, adjust if necessary.

Important: If feeling uncomfortable about doing this procedure

or the proper tools are not available, please contact the Dealer for
service assistance. This is a very important step to ensure longest
life for the engine.

25

Section 4 — Maintenance

Air-cooled Generators

To check valve clearance:

The engine should be cool before checking. If valve clearance is •

0.002" - 0.004" (0.05 - 0.1mm), adjustment is not needed.
Remove spark plug wires and position wires away from plugs.•
Remove spark plugs.•
Make sure the piston is at Top Dead Center (TDC) of its com-•

pression stroke (both valves closed). To get the piston at TDC,
remove the intake screen at the front of the engine to gain
access to the flywheel nut. Use a large socket and socket
wrench to rotate the nut and hence the engine in a clockwise
direction. While watching the piston through the spark plug
hole. The piston should move up and down. The piston is at
TDC when it is at its highest point of travel.

To adjust valve clearance (if necessary), (Figure 4.9):

Make sure the engine is at 60° to 80° F.•
Make sure that the spark plug wire is removed from the spark •

plug and out of the way.
Remove the four screws attaching the valve cover.•
Loosen the rocker jam nut. Use an 10mm allen wrench to turn •

the pivot ball stud while checking clearance between the rocker

arm and the valve stem with a feeler gauge. Correct clearance

is 0.002-0.004 inch (0.05-0.1 mm).

NOTE:

Hold the rocker arm jam nut in place as the pivot ball
stud is turned.

When valve clearance is correct, hold the pivot ball stud in place
with the allen wrench and tighten the rocker arm jam nut. Tighten
the jam nut to 174 in/lbs. torque. After tightening the jam nut,
recheck valve clearance to make sure it did not change.

Install new valve cover gasket.•
Re-attach the valve cover.•

NOTE:

Start all four screws before tightening or it will not be
possible to get all the screws in place. Make sure the
valve cover gasket is in place.

Install spark plugs.•
Re-attach the spark plug wire to the spark plug.•
On the GT-530 and GT-990/999, repeat the process for the •

other cylinder.

4.8 COOLING SYSTEM

Air inlet and outlet openings in the generator compar tment must
be open and unobstructed for continued proper operation. This
includes such obstructions as high grass, weeds, br ush, leaves
and snow.

Without sufficient cooling and ventilating air flow, the engine/gen­erator quickly overheats, which causes it to quickly shut down.
(See Figure 4.10 for vent locations.)

Make sure the doors and roof are in place during operation as
running the generator with them removed can effect cooling air
movement.

The exhaust from this product gets extremely



hot and remains hot after shutdown. High grass,
weeds, brush, leaves, etc. must remain clear of
the exhaust. Such materials may ignite and burn
from the heat of the exhaust system.

Figure 4.10 – Cooling Vent Locations

Figure 4.9 - Valve Clearance Adjustment

Rocker

Pivot Ball

Jam Nut

26

Stud

Arm

Valve
Stem

The maximum ambient temperature for the gen-



erator is 25° C (77° F).

Section 4 — Maintenance

Air-cooled Generators

4.9 ATTENTION AFTER SUBMERSION

If the generator has been submerged in water, it MUST NOT be
started and operated. Following any submersion in water, have
a Dealer thoroughly clean, dry and inspect the generator. If the
structure (ex. home) has been flooded, it should be inspected by
a cer tified electrician to ensure there won't be any electrical prob­lems during generator operation or when utility is returned.

4.10 CORROSION PROTECTION

Periodically wash and wax the enclosure using automotive type
products. Frequent washing is recommended in salt water/coastal
areas. Spray engine linkages with a light oil such as WD-40.

4.11 OUT OF SERVICE PROCEDURE

4.11.1 REMOVAL FROM SERVICE 

If the generator cannot be exercised every seven days, and will
be out of service longer than 90 days, prepare the generator for
storage as follows:

1. Start the engine and let it war m up.

2. Close the fuel shutoff valve in the fuel supply line and allow
the unit to shut down.

3. Once the unit has shut down, switch to the OFF position.

4. Set the generator’s main circuit breaker to its OFF (or OPEN)
position.

5. Set the AUTO/OFF/MANUAL switch to OFF and turn off the util­ity power to the transfer switch. Remove the 7.5A fuse from
the generator control panel. Disconnect the battery cables as
outlined in “General Hazards”.

6. While the engine is still warm from running, drain the oil
completely. Refill the crankcase with oil. See ”Engine Oil
Recommendations".

7. Attach a tag to the engine indicating the viscosity and clas­sification of the oil in the crankcase.

8. Remove the spark plug(s) and spray fogging agent into the
spark plug(s) threaded openings. Reinstall and tighten the
spark plug(s).

9. Remove the battery and store it in a cool, dry room on a
wooden board. Never store the battery on any concrete or
ear then floor.

10. Clean and wipe the entire generator.

4.11.2 RETURN TO SERVICE 

To retur n the unit to service after storage, proceed as follows:

1. Verif y that utility power is turned off and that the AUTO/OFF/
MANUAL switch is set to OFF.

2. Check the tag on the engine for oil viscosity and classification.
Verify that the correct recommended oil is used in the engine
(see the Engine Oil Recommendations section). If necessary,
drain and refill with the proper oil.

3. Check the state of the batter y. Fill all cells of unsealed bat­teries to the proper level with distilled water. DO NOT USE
TAP WATER IN THE BATTERY. Recharge the battery to 100
percent state of charge, or, if defective, replace the batter y.
See “Specifications,” for type and size.

4. Clean and wipe the entire generator.

5. Make sure the 7.5A fuse is removed from the generator con­trol panel. Reconnect the battery. Observe battery polarity.
Damage may occur if the battery is connected incorrectly.

6. Open the fuel shutoff valve.

7. Insert the 7.5A fuse into the generator control panel. Start the
unit by moving the AUTO/OFF/MANUAL switch to MANUAL.
Allow the unit to warm up thoroughly.

8. Stop the unit by setting the AUTO/OFF/MANUAL switch to
OFF.

9. Turn on the utility power to the transfer switch.

10. Set the AUTO/OFF/MANUAL switch to AUTO.

11. The generator is now ready for service.

NOTE:

If the battery was dead or disconnected, the exercise
timer (single cylinder), current date and time (v-twin)
must be reset.

4.11.3 ACCESSORIES 

There are performance enhancing accessories available for the
air-cooled generators.

Cold Weather Kits• are recommended in areas where tempera-

tures regularly fall below 10° F (-12° C).

Scheduled Maintenance Kits• include all pieces necessary to

perfor m maintenance on the generator along with oil recom­mendations.

A Fascia Skirt Wrap• is standard on all 20kW units. It's avail-

able for all other current production air-cooled units. It snaps
together to provide a smoothing, contoured look as well as
rodent/insect protection.

The Remote Monitor System• is a wireless, indoor mounted,

box that indicates generator run status and allows for exercise
programing as well as provide maintenance reminders.

Touch-up Paint Kits• are very important to maintain the look and

integrity of the generator enclosure. These kits include touch-up
paint and instructions if the need should arise.

For more details on accessories, please contact a Dealer.•

27

Section 4 — Maintenance

Air-cooled Generators

4.12 SERVICE SCHEDULE

ATTENTION: It is recommended that all service work

be performed by the nearest Dealer.

SYSTEM/COMPONENT PROCEDURE FREQUENCY

X = Action
R = Replace as Necessary

Inspect Change Clean

* = Notify Dealer if Repair is

Needed.

FUEL

Fuel lines and connections*

XM

LUBRICATION

Oil level

Oil

Oil filter

X M or 24 hours of

X 2Y or 200 hours

X 2Y or 200 hours

COOLING

Enclosure louvers

XXW

BATTERY

Remove corrosion, ensure
dryness

Clean and tighten battery
terminals

Check charge state
Electrolyte level

XXM

XXM

X R EVERY 6 M
X R EVERY 6 M

ENGINE AND MOUNTING

Air cleaner
Spark plug(s)

X R 2Y or 200 hours
X R 2Y or 200 hours

GENERAL CONDITION

Vibration, Noise, Leakage, Temperature*

XM

COMPLETE TUNE-UP* TO BE COMPLETED BY A DEALER 2Y or 200 hours

* Contact the nearest dealer for assistance if necessary.
** Change oil and filter after first eight (8) hours of operation and then every 200 hours thereafter, or 2 years, whichever occurs first. Change

sooner when operating under a heavy load or in a dusty or dirty environment or in high ambient temperatures.

W = Weekly

M = Monthly

Y = Yearly

continuous operation.

of operation.**

of operation.**

28

Section 5 — Troubleshooting

Air-cooled Generators

5.1 TROUBLESHOOTING GUIDE

Problem Cause Correction

The engine will not crank. 1. Fuse blown. 1. Correct short circuit condition, replace

7.5A fuse in generator
control panel.

2. Loose, corroded or defective 2. Tighten, clean or replace
battery cables. as necessary.

3. Defective starter contactor. (8 kW) 3. *

4. Defective starter motor. 4. *

5. Dead Battery. 5. Charge or replace battery.

The engine cranks but 1. Out of fuel. 1. Replenish fuel/Tur n on fuel valve.
will not star t. 2. Defective fuel solenoid (FS). 2. *

3. Open #14 wire from 3. *
engine control board.

4. Fouled spark plug(s). 4. Clean, re-gap or replace plug(s).

5. Valve lash out of adjustment. 5. Reset valve lash.

6. Choke not operating. 6. Verify choke plate moves freely.

The engine star ts hard 1. Air cleaner plugged 1. Check, replace air cleaner.
and runs rough. or damaged.

2. Fouled spark plug(s). 2. Clean, re-gap or replace plug(s).

3. Fuel pressure incorrect. 3. Confirm fuel pressure to regulator

is 10-12” water column (0.36-0.43 psi) for
LP, and 5-7” water column (0.18-0.25 psi)
for natural gas.

4. Fuel selector in wrong position. 4. Move selector to correct position.

5. Choke remains closed. 5. Verify choke plate moves freely.

The AUTO/OFF/MANUAL 1. Defective switch. 1. *
switch is set to OFF, but 2. AUTO/OFF/MANUAL switch 2. *

the engine continues wired incorrectly.
to run. 3. Defective control board. 3. *

There is no AC output 1. Main line circuit breaker is in 1. Reset circuit breaker
from the generator. the OFF (or OPEN) position. to ON (or CLOSED).

2. Generator internal failure. 2. *

There is no transfer to 1. Defective transfer switch coil. 1. *
standby after utility 2. Defective control logic board. 2. *

Unit consumes large 1. Engine over filled with oil. 1. Adjust oil to proper level.
amounts of oil. 2. Improper type or viscosity of oil. 2. See "Engine Oil Recommendations".

3. Damaged gasket, seal or hose. 3. Check for oil leaks.

4. Engine breather defective. 4. *

*Contact the nearest Dealer for assistance.

29

Section 6 — Appendix

Air-cooled Generators

6.1 MENU SYSTEM NAVIGATION

To get to the MENU, use the "Esc" key from any page. It may need
to be pressed many times before getting to the menu page. The
currently selected menu is displayed as a flashing word. Navigate
to the menu required by using the +/- keys. When the menu
required is flashing, press the ENTER key. Depending on the menu
selected, there may be a list of choices presented. Use the same
navigation method to select the the desired screen (refer to the
Menu System diagram).

6.1.1 CHANGING SET TINGS (EDIT MENU) 

To change a setting such as display contrast, go to the EDIT menu
and use the +/- keys to navigate to the setting to change. Once
this setting is displayed (e.g. Contrast), press the ENTER key to go
into the edit mode. Use the +/- keys to change the setting, press
the ENTER key to store the new setting.

NOTE:

If the ENTER key is not pressed to save the new set­ting, it will only be saved temporarily. The next time
the battery is disconnected, the setting will revert
back to the old setting.

30

DEBUG

Section 6 — Appendix

Air-cooled Generators

RESET

MAINTENANCE

INPUTS OUTPUTS DISPLAYS

ESC ESC

EDIT

ESC

MAIN MENU

ESC

MENU SYSTEM

17 &

STARTUP

only

20kW

DELAY

VERSIONSDISPLAY

COMMAND

CONTRAST

ESC

English

or Other

LANGUAGE

ENGINE

HOURS

17 &

20kW

ENGINE

60 Hz

FREQUENCY

only

RPM

17 &

TIME/DATE

20kW

GENERATOR

only

FREQUENCY

TIME

EXERCISE

The possible commands

on Line 2 of the display

are as follows:

• Switched Off

only

17 &

20kW

BATTERY

VO LTAGE

• Running Manually

• Stopped in Auto Mode

• Running - Utility Lost

• Running in Exercise

• Running from Radio

HISTORY STATUS

ESC

STAT E

RUN LOGALARM LOG

Press the “ESCAPE” key

to jump back up through

ESC

the menu levels.

Use the “+/-” key

to navigate through

the menu.

Use the “ENTER” key

to select items or

enter data.

The possible Status messages of the display

are as follows:

• Switched Off/Time & Date

• Ready to Run/Time & Date

• Utility Loss Delay/Pausing for X Seconds

• Cranking/Attempt # X

• Running in Exercise/Time & Date

• Running/Cooling Down

• Running - Warning/Warning Message

• Running - Alarm/Alarm Message

• Stopped - Alarm/Alarm Message

• Stopped - Warning/Warning Message

• Cranking/Pausing for X Seconds

• Running/Time & Date

• Running/Warming Up

• Cranking - Warning/Warning Message

• Cranking - Alarm/Alarm Message

+ / -

ENTER

31

31

Section 7 — Installation Diagrams

Air-cooled Generators
Typical Non-Service Entrance Type

UTILITY DISCONNECT

UTILITY SUPPLY FROM

POWER LEADS AND TRANSFER SWITCH LEADS

MUST BE RUN IN TWO DIFFERENT CONDUITS.

EXCEPTIONS:

IF THE INSULATION RATING ON ALL WIRING IS

RATED FOR 600V AND THE LENGTH OF THE

CONDUIT IS 30 ft OR LESS IT IS ACCEPTABLE

TO INCLUDE GENERATOR CONTROL AND

POWER WIRING IN ONE CONDUIT

NEUTRAL

FUSE

5 AMP

BC LINE

E2

E1

T1

T2

FUSE

BC LINE

5 AMP

N1

N2

N2N1

GROUND

CUSTOMER LOAD

(DISTRIBUTION PANEL)

CONNECTION

GROUNDING ELECTRODE

(ELECTRODE)

GROUNDING ROD

32

E2

E1

(ON REAR OF UNIT)

BC LINE
BC LINE

GREEN

15B

0

N1

N2

WHITE

NOTE:

INSTALLATION TO BE DONE BY A LICENSED ELECTRICIAN AND

MUST MEET ALL NATIONAL, STATE AND LOCAL ELECTRICL CODES.

TYPICAL FOR ALL EATON NON-SERVICE ENTRANCE RATED TRANSFER SWITCHES.

METER

UTILITY

Section 7 — Installation Diagrams

Air-cooled Generators

Typical Service Entrance Type

SOCKET

POWER LEADS AND TRANSFER SWITCH LEADS

MUST BE RUN IN TWO DIFFERENT CONDUITS.

EXCEPTIONS:

IF THE INSULATION RATING ON ALL WIRING IS

RATED FOR 600V AND THE LENGTH OF THE

CONDUIT IS 30 ft OR LESS IT IS ACCEPTABLE

TO INCLUDE GENERATOR CONTROL AND

POWER WIRING IN ONE CONDUIT

FUSE

BC LINE

T1

(DISTRIBUTION PANEL)

FUSE

BC LINE

N1

N2

N2N1

5 AMP

GROUND

NEUTRAL

5 AMP

E2

E1

T2

CUSTOMER LOAD

CONNECTION

GROUNDING ELECTRODE

(ELECTRODE)

GROUNDING ROD

E2

E1

(ON REAR OF UNIT)

BC LINE
BC LINE

TYPICAL FOR ALL EATON SERVICE ENTRANCE RATED TRANSFER SWITCHES.

GREEN

15B

0

N1

N2

WHITE

NOTE:

INSTALLATION TO BE DONE BY A LICENSED ELECTRICIAN AND

MUST MEET ALL NATIONAL, STATE AND LOCAL ELECTRICL CODES.

33

Section 7 — Installation Diagrams

Air-cooled Generators
Generator - Drawing No. 0G8280-D

34

Section 7 — Installation Diagrams

Air-cooled Generators

Generator - Drawing No. 0G8280-D

35

Section 8 – Warranty

Air-cooled Generators

NOTE: This Emission Control Warranty Statement pertains to this product only IF the generator size is 15 kW or below.

CALIFORNIA EMISSION CONTROL WARRANTY STATEMENT

YOUR WARRANTY RIGHTS AND OBLIGATIONS

The California Air Resources Board (CARB) and Generac Power Systems, Inc. (Generac) are pleased to explain the Emission Control System Warranty on
your new engine.* In California, new utility, and lawn and garden equipment engines must be designed, built and equipped to meet the state’s stringent
anti-smog standards. Generac will warrant the emission control system on your engine for the periods of time listed below provided there has been no
abuse, neglect, unapproved modification or improper maintenance of your engine.

Your emission control system may include parts such as the carburetor, ignition system and exhaust system. Generac will repair your engine at no cost to
you for diagnosis, replacement parts and labor, should a warrantable condition occur.

MANUFACTURER’S EMISSION CONTROL SYSTEM WARRANTY COVERAGE:

Emissions control systems on 1995 and later model year engines are warranted for two years as hereinafter noted. If, during such warranty period, any
emission-related component or system on your engine is found to be defective in materials or workmanship, repairs or replacement will be perfor med by
a Generac Authorized Warranty Service Facility.

PURCHASER’S/OWNER’S WARRANTY RESPONSIBILITIES:

As the engine purchaser/owner, you are responsible for the completion of all required maintenance as listed in your factory supplied Owner’s Manual. For
warranty purposes, Generac recommends that you retain all receipts covering maintenance on your engine. However, Generac cannot deny warranty solely
due to the lack of receipts or for your failure to ensure the completion of all scheduled maintenance.

As the engine purchaser/owner, you should, however, be aware that Generac may deny any and/or all war ranty coverage or responsibility if your engine,
or a part/component thereof, has failed due to abuse, neglect , improper maintenance or unapproved modifications, or the use of counter feit and/or “grey
market” parts not made, supplied or approved by Generac.

You are responsible for contacting a Generac Authorized Warranty Service Facility as soon as a problem occurs. The warranty repairs should be
completed in a reasonable amount of time, not to exceed 30 days.

Warranty service can be arranged by contacting either your selling dealer or a Generac Authorized Warranty Ser vice Facility. To locate the Generac
Authorized Warranty Service Facility nearest you, call our toll-free number:

1-800-333-1322

IMPORTANT NOTE: This warranty statement explains your rights and obligations under the Emission Control System Warranty (ECS Warranty), which is
provided to you by Generac pursuant to California law. See also the “Generac Limited Warranties for Generac Power Systems, Inc.,” which is enclosed
herewith on a separate sheet, also provided to you by Generac. The ECS Warranty applies only to the emission control system of your new engine. If there
is any conflict in terms between the ECS Warranty and the Generac Warranty, the ECS Warranty shall apply except in circumstances where the Generac
Warranty may provide a longer warranty period. Both the ECS Warranty and the Generac Warranty describe impor tant rights and obligations with respect
to your new engine.

Warranty service can be performed only by a Generac Authorized Warranty Service Facility. When requesting warranty service, evidence must be presented
showing the date of the sale to the original purchaser/owner.

If you have any questions regarding your warranty rights and responsibilities, you should contact Generac at one of the following addresses:
For Air-cooled Product ... For Liquid-cooled Product ...

ATTENTION WARRANTY DEPARTMENT ATTENTION WARRANTY DEPARTMENT
GENERAC POWER SYSTEMS, INC. GENERAC POWER SYSTEMS, INC.
P.O. BOX 297 211 MURPHY DRIVE
WHITEWATER, WI 53190 EAGLE, WI 53119

Part 1

36

Section 8 – Warranty

Air-cooled Generators

EMISSION CONTROL SYSTEM WARRANTY

Emission Control System Warranty (ECS Warranty) for 1995 and later model year engines:

(a) Applicability: This warranty shall apply to 1995 and later model year engines. The ECS Warranty Period shall begin on the date the new engine or equip-

ment is purchased by/delivered to its original, end-use purchaser/owner and shall continue for 24 consecutive months thereafter.

(b) General Emissions Warranty Coverage: Generac warrants to the original, end-use purchaser/owner of the new engine or equipment and to each subse-

quent purchaser/owner that each of its engines is ...
(1) Designed, built and equipped so as to confor m with all applicable regulations adopted by the CARB pursuant to its authority, and
(2) Free from defects in materials and workmanship which, at any time during the ECS Warranty Period, may cause a warranted emissions-related part

to fail to be identical in all material respects to the part as described in the engine manufacturer’s application for certification.

(c) The ECS Warranty only per tains to emissions-related parts on your engine, as follows:

(1) Any warranted, emissions-related parts that are not scheduled for replacement as required maintenance in the Owner’s Manual shall be warranted for

the ECS Warranty Period. If any such part fails during the EC S Warranty Period, it shall be repaired or replaced by Generac according to Subsection
(4) below. Any such part repaired or replaced under the ECS Warranty shall be warranted for the remainder of the ECS Warranty Period.

(2) Any warranted, emissions-related part that is scheduled only for regular inspection as specified in the Owner’s Manual shall be warranted for the ECS

Warranty Period. A statement in such written instructions to the effect of “repair or replace as necessary” shall not reduce the ECS Warranty Period.
Any such part repaired or replaced under the EC S Warranty shall be war ranted for the remainder of the EC S Warranty Period.

(3) Any warranted, emissions-related par t that is scheduled for replacement as required maintenance in the Owner’s Manual shall be war ranted for the

period of time prior to the first scheduled replacement point for that part. If the part fails prior to the first scheduled replacement, the part shall be
repaired or replaced by Generac according to Subsection (4) below. Any such emissions-related part repaired or replaced under the ECS Warranty
shall be warranted for the remainder of the ECS Warranty Period prior to the first scheduled replacement point for such emissions-related par t.

(4) Repair or replacement of any warranted, emissions-related part under this EC S Warranty shall be performed at no charge to the owner at a Generac

Authorized Warranty Service Facility.

(5) When the engine is inspected by a Generac Authorized Warranty Service Facility, the owner shall not be held responsible for diagnostic costs if the

repair is deemed warrantable.

(6) Generac shall be liable for damages to other original engine components or approved modifications proximately caused by a failure under warranty

of any emission-related part covered by the EC S Warranty.

(7) Throughout the ECS Warranty Period, Generac shall maintain a supply of warranted emission-related par ts sufficient to meet the expected demand

for such emission-related parts.

(8) Any Generac authorized and approved emission-related replacement part may be used in the performance of any ECS Warranty maintenance or repairs

and will be provided without charge to the owner. Such use shall not reduce Generac ECS Warranty obligations.

(9) Unapproved, add-on, modified, counterfeit and/or “grey market” par ts may not be used to modif y or repair a Generac engine. Such use voids this

ECS Warranty and shall be sufficient grounds for disallowing an ECS Warranty claim. Generac shall not be held liable hereunder for failures of any
warranted par ts of a Generac engine caused by the use of such an unapproved, add-on, modified, counterfeit and/or “grey market” part.

EMISSION RELATED PARTS INCLUDE THE FOLLOWING:

1) Fuel Metering System:

1.2) LPG/Natural Gas carburetion assembly and its internal components.
a) Fuel controller (if so equipped)
b) Mixer and its gaskets (if so equipped)
c) Carburetor and its gaskets (if so equipped)
d) Primary gas regulator (if so equipped)
e) LP liquid vaporizer (if so equipped)

2) Air Induction System including:
a) Intake pipe/manifold
b) Air cleaner

3) Ignition System including:

* Generac engine types covered by this warranty statement include the following:

1) Prepackaged Standby Generator

2) Auxiliary Power Unit (APU) Generator

3) Standby Generator

Part 2

a) Spark plug
b) Ignition module

4) Catalytic Muffler Assembly (if so equipped) including:
a) Muffler gasket
b) Exhaust manifold

5) Crankcase Breather Assembly including:
a) Breather connection tube

37

Part No. 0H4762 Revision A (07/28/09) Printed in U.S.A.