Briggs & Stratton 40451, 40450, 40449, 40481 User Manual

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Generator Systems

Operator’s Manual

Generator System

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Thank you for purchasing this quality-built Briggs & Stratton® home generator. We’re pleased that you’ve placed your
confidence in the Briggs & Stratton brand. When operated and maintained according to the instructions in this manual, your
home generator will provide many years of dependable service.

This manual contains safety information to make you aware of the hazards and risks associated with home standby
generators and how to avoid them. Because we do not necessarily know all the applications this equipment could be used
for, it is important that you read and understand these instructions thoroughly before attempting to start or operate this
equipment. Save these original instructions for future reference.

This home generator requires professional installation before use. Refer to the separate installation manual for full
information. Your installer should follow the instructions completely.

Where to Find Us

You never have to look far to find Briggs & Stratton support and service for your generator. Consult your Yellow Pages.
There are thousands of Briggs & Stratton authorized service dealers worldwide who provide quality service. You can also
contact Technical Service by phone at 800-732-2989 between 8:00 AM and 5:00 PM CT., or click on Find a Dealer at
BRIGGSandSTRATTON.COM, which provides a list of authorized dealers.

Generator and engine model and serial numbers should be recorded in the installation manual.

Briggs & Stratton Power Products Group, LLC
P.O. Box 702
Milwaukee, WI 53201-0702

Copyright © 2014. All rights reserved. No part of this material
may be reproduced or transmitted in any form without the express
written permission of Briggs & Stratton Power Products Group, LLC.

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Table of Contents

Important Safety Instructions........................4

Installation ....................................7

For the Home Owner:..........................................7

For the Installing Dealer/Contractor: ..............................7

Owner Orientation ............................................7

Fuel Factors .................................................8

Generator Location............................................9

Delivery Inspection...........................................10

Controls ..................................... 11

Access Ports ...............................................13

System Control Panel.........................................15

Operation .................................... 19

Engine Oil..................................................19

Battery ....................................................19

15 Amp Fuse ...............................................19

Automatic Operation Sequence .................................19

Setting Exercise Timer ........................................20

Maintenance .................................. 21

Servicing the System .........................................21

Service Code Detection System .................................21

Maintenance Schedule . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Generator Maintenance .......................... 23

Engine Maintenance............................. 24

Adjust Valve Lash............................................24

Engine Oil..................................................25

Service Air Cleaner...........................................26

Fuel System Inspection and Maintenance .........................27

Exhaust System Maintenance and Inspection ......................27

Service Spark Plugs..........................................27

Clean Air Cooling System and Oil Cooler Fins . . . . . . . . . . . . . . . . . . . . . . 27

When Calling for Assistance ...................................27

Storage....................................................27

Troubleshooting................................ 28

Warranty..................................... 29

Limited Warranty ............................................30

About Your Warranty .........................................31

Generator Specifications.......................... 33

Engine Specifications ............................ 33

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Save These Instructions

Important Safety Instructions

SAVE THESE INSTRUCTIONS - This manual contains
important instructions that should be followed during
installation and maintenance of the generator and batteries.

Safety Symbols and Meanings

Explosion

Toxic Fumes

Lift Hazard

Fire

Rotating Parts

Read Manual

Electrical Shock

Hot Surface

Chemical BurnExplosive PressureAuto Start

WARNING Running engine gives off carbon monoxide,

an odorless, colorless, poison gas.
Breathing carbon monoxide could result in death,
serious injury, headache, fatigue, dizziness,
vomiting, confusion, seizures, nausea or fainting.

• Operate this product ONLY outdoors in an area that will
not accumulate deadly exhaust gas.

• Keep exhaust gas away from any windows, doors,
ventilation intakes, soffit vents, crawl spaces, open garage
doors or other openings that can allow exhaust gas
to enter inside or be drawn into a potentially occupied
building or structure.

• Carbon monoxide detector(s) MUST be installed and
maintained indoors according to the manufacturer’s
instructions/recommendations. Smoke alarms cannot
detect carbon monoxide gas.

WARNING The engine exhaust from this product

contains chemicals known to the State of California to
cause cancer, birth defects, or other reproductive harm.

WARNING Certain components in this product and

related accessories contain chemicals known to the State
of California to cause cancer, birth defects, or other
reproductive harm. Wash hands after handling.

The safety alert symbol indicates a potential personal
injury hazard. A signal word (DANGER, WARNING, or
CAUTION) is used with the alert symbol to designate a
degree or level of hazard seriousness. A safety symbol
may be used to represent the type of hazard. The signal
word NOTICE is used to address practices not related to
personal injury.

DANGER indicates a hazard which, if not avoided, will
result in death or serious injury.

WARNING indicates a hazard which, if not avoided, could
result in death or serious injury.

CAUTION indicates a hazard which, if not avoided, could
result in minor or moderate injury.

NOTICE addresses practices not related to personal injury.
The manufacturer cannot possibly anticipate every possible

circumstance that might involve a hazard. The warnings in
this manual, and the tags and decals affixed to the unit are,
therefore, not all-inclusive. If you use a procedure, work
method or operating technique that the manufacturer does
not specifically recommend, you must satisfy yourself that
it is safe for you and others. You must also make sure that
the procedure, work method or operating technique that you
choose does not render the generator system unsafe.

WARNING Storage batteries give off explosive

hydrogen gas during recharging.
Slightest spark will ignite hydrogen
and cause explosion, resulting in
death or serious injury.

Battery electrolyte fluid contains acid and is
extremely caustic.
Contact with battery contents will cause severe
chemical burns.
A battery presents a risk of electrical shock and high short
circuit current.

• DO NOT dispose of battery in a fire. Recycle battery.

• DO NOT allow any open flame, spark, heat, or lit cigarette
during and for several minutes after charging a battery.

• DO NOT open or mutilate the battery.

• Wear protective goggles, rubber apron, rubber boots and
rubber gloves.

• Remove watches, rings, or other metal objects.

• Use tools having insulated handles.

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WARNING Generator produces hazardous voltage.

Failure to properly ground generator could result in
electrocution.
Failure to isolate generator from utility power could
result in death or serious injury to electric utility
workers due to backfeed of electrical energy.

• When using generator for backup power, notify
utility company.

• DO NOT touch bare wires or bare receptacles.

• DO NOT use generator with electrical cords which are
worn, frayed, bare or otherwise damaged.

• DO NOT handle generator or electrical cords while
standing in water, while barefoot, or while hands or feet
are wet.

• If you must work around a unit while it is operating,
stand on an insulated dry surface to reduce the risk of a
shock hazard.

• DO NOT allow unqualified persons or children to operate
or service generator.

• In case of an accident caused by electrical shock,
immediately shut down the source of electrical power and
contact the local authorities. Avoid direct contact with

the victim.

• Despite the safe design of the generator, operating this
equipment imprudently, neglecting its maintenance or
being careless can cause possible injury or death.

• Remain alert at all times while working on this equipment.
Never work on the equipment when you are physically or
mentally fatigued.

• Before performing any maintenance on the generator,
disconnect the battery cable indicated by a NEGATIVE,
NEG or (-) first. When finished, reconnect that cable last.

• After your system is installed, the generator may crank
and start without warning any time there is a power
failure. To prevent possible injury, always set the
generator’s system switch to OFF, remove the service
disconnect from the disconnect box AND remove the
15 Amp fuse BEFORE working on the equipment.

WARNING Propane and Natural Gas are extremely

flammable and explosive, which could
cause burns, fire or explosion resulting in
death or serious injury.

• DO NOT operate the equipment if the “fuel shut-off” valve
is missing or inoperative.

• Install the fuel supply system according to NFPA 37 and
other applicable fuel-gas codes.

• Before placing the generator into service, the fuel system
lines must be properly purged and leak tested.

• After the generator is installed, you should inspect the fuel
system periodically.

• NO leakage is permitted.

• DO NOT operate engine if smell of fuel is present or other
explosive conditions exist.

• DO NOT smoke around the generator. Wipe up any oil
spills immediately. Ensure that no combustible materials
are left in the generator compartment. Keep the area near
the generator clean and free of debris.

WARNING Starter and other rotating parts can

entangle hands, hair, clothing, or accessories
resulting in serious injury.

• NEVER operate generator without protective housings,
covers, or guards in place.

• DO NOT wear loose clothing, jewelry or anything that may
be caught in the starter or other rotating parts.

• Tie up long hair and remove jewelry.

• Before servicing, remove 15 Amp fuse from control panel
and disconnect Negative (NEG or -) battery cable.

WARNING Unintentional sparking could cause fire or electric

shock resulting in death or serious injury.

WHEN ADJUSTING OR MAKING REPAIRS TO YOUR GENERATOR

• Disconnect the spark plug wire from the spark plug and place
the wire where it cannot contact spark plug.

WHEN TESTING FOR ENGINE SPARK

• Use approved spark plug tester.

• DO NOT check for spark with spark plug removed.

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WARNING

• DO NOT touch hot parts and AVOID hot exhaust gases.

• Allow equipment to cool before touching.

• Exhaust outlet side of weatherproof enclosure must
have at least 5 ft. (1.5 m) minimum clearance from any
structure, shrubs, trees or any kind of vegetation.

• Standby generator weatherproof enclosure must be at
least 5 ft. (1.5 m) from windows, doors, any wall opening,
shrubs or vegetation over 12 inches (30.5 cm) in height.

• Standby generator weatherproof enclosure must have a
minimum of 5 ft. (1.5 m) overhead clearance from any
structure, overhang or trees.

• DO NOT place weatherproof enclosure under a deck or
other type of structure that may confine airflow.

• Use only flexible fuel line provided. Connect provided fuel
line to generator, DO NOT use with or substitute any other
flexible fuel line.

• Smoke detector(s) MUST be installed and maintained
indoors according to the manufacturer’s instructions/
recommendations. Carbon monoxide alarms cannot
detect smoke.

• Keep at least minimum distances shown in General
Location Guidelines to insure for proper generator cooling
and maintenance clearances.

• It is a violation of California Public Resource Code,
Section 4442, to use or operate the engine on any forest­covered, brush-covered, or grass-covered land unless
the exhaust system is equipped with a spark arrester, as
defined in Section 4442, maintained in effective working
order. Other states or federal jurisdictions may have
similar laws.
Contact the original equipment manufacturer, retailer, or
dealer to obtain a spark arrester designed for the exhaust
system installed on this engine.

• Replacement parts must be the same and installed in the
same position as the original parts.

CAUTION Installing the 15 Amp fuse could cause

Exhaust heat/gases could ignite
combustibles or structures resulting in
death or serious injury. Contact with muffler
area could cause burns resulting in serious
injury.

the engine to start at any time without warning
resulting in minor or moderate injury.

CAUTION Excessively high operating speeds could

result in minor injury.
Excessively low speeds impose a heavy load on generator.

• DO NOT tamper with governed speed. Generator supplies
correct rated frequency and voltage when running at
governed speed.

• DO NOT modify generator in any way.

NOTICE Improper treatment of generator can damage it
and shorten its life.

• Use generator only for intended uses.

• If you have questions about intended use, contact your
authorized dealer.

• Operate generator only on level surfaces.

• Adequate, unobstructed flow of cooling and ventilating air
is critical to correct generator operation.

• The Oil Fill, Oil Drain and the Control Panel doors must be
installed whenever the unit is running.

• DO NOT expose generator to excessive moisture, dust,
dirt, or corrosive vapors.

• Despite the safe design of the generator, operating this
equipment imprudently, neglecting its maintenance or
being careless can cause possible injury or death.

• Remain alert at all times while working on this equipment.
Never work on the equipment when you are physically or
mentally fatigued.

• DO NOT start engine with air cleaner or air cleaner
cover removed.

• DO NOT insert any objects through cooling slots.

• DO NOT use the generator or any of its parts as a step.
Stepping on the unit can cause stress and break parts.
This may result in dangerous operating conditions from
leaking exhaust gases, fuel leakage, oil leakage, etc.

• If connected devices overheat, turn them off and
disconnect them from generator.

Shut off generator if:

-electrical output is lost;

-equipment sparks, smokes, or emits flames;

-unit vibrates excessively:

-unit makes unusual noises.

• Observe that the 15 Amp fuse has been removed from the
control panel for shipping.

• DO NOT install this fuse until all plumbing and wiring has
been completed and inspected.

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Installation

We sincerely appreciate your patronage. For this reason, we
have made every effort to provide for a safe, streamlined
and cost-effective installation. Because each installation is
unique, it is impossible to know of and advise the trade of all
conceivable procedures and methods by which installation
might be achieved. Neither could we know of possible
hazards and/or the results of each method or procedure. For
these reasons,

Only current licensed electrical and plumbing professionals
should attempt home generator system installations.
Installations must strictly comply with all applicable codes,
industry standards and regulations.

Your home generator is supplied with this “Operator’s
Manual” and a separate “Installation Manual”. These are
important documents and should be retained by the owner
after the installation has been completed.

This product is only for use as an optional generator system
which provides an alternate source of electric power and
to serve loads such as heating, refrigeration systems, and
communication systems that, when stopped during any
power outage, could cause discomfort or inconvenience.

NOTICE This product does NOT qualify for either an
emergency standby or legally required standby system as
defined by NFPA 70 (NEC).

• Emergency generator systems are intended to
automatically supply illumination, power, or both, to
designated areas and equipment in the event of failure
of the normal supply. Emergency systems may also
provide power for such functions as ventilation where
essential to maintain life, where current interruption
of the normal supply would produce serious life
safety or health hazards.

• Legally Required standby generator systems are
intended to automatically supply power to selected
loads in the event of failure of the normal source
which could create hazards or hamper rescue or fire­fighting operations.

Every effort has been made to ensure that information in this
manual is accurate and current. However, we reserve the
right to change, alter, or otherwise improve the product and
this document at any time without prior notice.

Only current licensed electrical and plumbing professionals
should attempt home generator system installations.
Installations must strictly comply with all applicable codes,
industry standards, laws and regulations.

For the Home Owner:

To help you make informed choices and communicate
effectively with your installation contractor(s), read and

understand Owner Orientation in this manual before
contracting or starting your generator installation.

To arrange for proper installation, contact the store at which
you purchased your generator, your dealer, a licensed
electrician or your utility power provider.

The generator warranty is VOID unless the
system is installed by licensed electrical and
plumbing professionals.

Every effort has been made to ensure that information in this
manual is accurate and current. However, we reserve the
right to change, alter, or otherwise improve the product and
this document at any time without prior notice.

The Emission Control System for this generator is warranted
for standards set by the U.S. Environmental Protection
Agency and by the California Air Resources Board (CARB).

For the Installing Dealer/Contractor:

For most applications, the installation manual contains
all the information required to properly install and start
the generator. This operator’s manual describes routine
operation and owner maintenanceprocedures.

If you need more information in this matter, please call at
800-732-2989 between 8:00 AM and 5:00 PM CT.

Owner Orientation

This section provides generator owners with the information
necessary to achieve the most satisfactory and cost effective
installation possible.

The illustrations are for typical circumstances and are meant
to familiarize you with the installation options available
with your generator. A thorough understanding of these
options will provide fundamental control over the cost of
your installation, as well as ensure your final satisfaction
and security.

Federal and local codes, appearance, noise levels, fuel types,
and distances are the factors that must be considered when
negotiating with an installation professional. Remember
that as the distance from the existing electrical service and
gaseous fuel supply increases, and the number of 90 degree
bends in the fuel supply increases, compensations in piping
and wiring materials must be made. This is necessary to
comply with local codes and overcome electrical voltage
drops and gaseous fuel pressure drops.

The factors mentioned above will have a direct affect on
the overall price of your generator installation.

In some areas you may need to acquire electrical permits
for installing the generator, building permits for installing
gas lines, and permits for noise allowances. Your installer
should check your local codes AND obtain the permits before
installing the system.

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Fuel Factors

WARNING Propane and Natural Gas are extremely

flammable and explosive, which could
cause burns, fire or explosion resulting in
death or serious injury.

• The residential generator is equipped with an automatic
safety gas “fuel shut-off” valve.

• DO NOT operate the equipment if the “fuel shut-off” valve
is missing or inoperative.

An important consideration affecting the entire installation
is the type of fuel used by your generator. The system was
factory tested and adjusted using either natural gas or liquid
propane (LP vapor). For proper engine function, factors
that are inherent to each of these fuels, your location and
the duration of possible utility interruptions are important
considerations in the following fuel guidelines:

• Use clean, dry fuel, free of moisture or any
particulate material. Using fuels outside the
following recommended values may cause
performance problems.

• In engines set up to run on propane (LP), commercial
grade HD5 propane with a minimum fuel energy of
2500 BTUs/ft3 with maximum propylene content of
5% and butane and heavier gas content of 2.5% and
minimum propane content of 90%.

Natural gas rating will depend on specific fuel but typical
derates are between 10 to 20% off the LP gas rating.

Natural gas or LP engines are certified to operate on natural
or liquid propane gas. The emissions control system for this
engine is EM (Engine Modifications).

Power Decrease at High Altitude or High Temperature

Air density is less at high altitudes, resulting in less available
engine power. Specifically, engine power will decrease 3.5%
for each 1,000 feet (300 meters) above sea level and 1% for
each 10° F (5.6°C) above 77°F (25°C). Make sure you and
your installer consider these factors when determining total
generator load.

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Generator Location

The actual physical location of your generator has a direct
affect on:

1. The amount of plumbing required to fuel
your generator.

2. The amount of wiring required to control and connect
your generator.

Specific location guidelines are discussed in the installation
manual. Acquaint yourself with that information and confer
with your installer. Be sure to ask how your site might
affect installation costs and compliance with local codes
andstandards.

• Install generator outdoors in an area that will not
accumulate deadly exhaust gas.

• DO NOT install generator where exhaust gas could
accumulate and enter inside or be drawn into a
potentially occupied building or structure.

• By law it is required in many states to have a Carbon
Monoxide (CO) detector in operating condition in
your home. Carbon monoxide detector(s) (A) MUST
be installed and maintained indoors according to the
manufacturer’s instructions/recommendations. A CO
monitor is an electronic device that detects hazardous
levels of CO. When there is a buildup of CO, the
monitor will alert the occupants by flashing visual
indicator light and alarm. Smoke alarms cannot detect
CO gas.

A

WARNING Running engine gives off carbon monoxide,

an odorless, colorless, poison gas.
Breathing carbon monoxide could result in death,
serious injury, headache, fatigue, dizziness,
vomiting, confusion, seizures, nausea or fainting.

• Operate this product ONLY outdoors in an area that will
not accumulate deadly exhaust gas.

• Keep exhaust gas away from any windows, doors,
ventilation intakes, soffit vents, crawl spaces, open garage
doors or other openings that can allow exhaust gas
to enter inside or be drawn into a potentially occupied
building or structure.

• Carbon monoxide detector(s) MUST be installed and
maintained indoors according to the manufacturer’s
instructions/recommendations. Smoke alarms cannot
detect carbon monoxide gas.

WARNING Exhaust heat/gases could ignite

combustibles or structures resulting in death or
serious injury.

• Exhaust outlet side of weatherproof enclosure must
have at least 5 ft. (1.5 m) minimum clearance from any
structure, shrubs, trees, or any kind of vegetation.

• Standby generator weatherproof enclosure must be at
least 5 ft. (1.5 m) from windows, doors, any wall opening,
shrubs or vegetation over 12 in. (30.5 cm) in height.

• Standby generator weatherproof enclosure must have a
minimum of 5 ft. (1.5 m) overhead clearance from any
structure, overhang or trees.

• DO NOT place weatherproof enclosure under a deck or
other type of structure that may confine airflow.

• USE ONLY flexible fuel line provided. Connect provided
fuel line to generator. DO NOT use with or substitute any
other flexible fuel line.

• Smoke detector(s) MUST be installed and maintained
indoors according to the manufacturer’s instructions/
recommendations. Carbon monoxide alarms cannot
detect smoke.

• DO NOT place weatherproof enclosure in manner other
than shown in illustrations.

• Ensure exhaust gas is kept away from any windows,
doors, ventilation intakes, soffit vents, crawl spaces,
open garage doors or other openings that can
allow exhaust gas to enter inside or be drawn into
a potentially occupied building or structure. Your
neighbor’s home may be exposed to the engine exhaust
from your standby generator and must be considered
when installing your standby generator.

• Wind and air currents should be taken into
consideration when positioning generator.

See the installation manual for full details on safe generator
location.

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Delivery Inspection

Carefully inspect the generator for any damage that may have
occurred during shipment.

If loss or damage is noted at time of delivery, have the
person(s) making delivery note all damage on the freight bill
and affix his signature under the consignor’s memo of loss
or damage. If loss or damage is noted after delivery, separate
the damaged materials and contact the carrier and your
installer for claim procedures. Missing or damaged parts are
not warranted.

The home generator system is supplied with:

• Oil (5W30 Synthetic)

• Flexible steel fuel line

• Installation and start-up manual

• Operator’s manual

• Spare access keys

• Spare 15 Amp ATO-type fuse

Not included:

• Carbon monoxide detector(s)

• Smoke detector(s)

• Starting battery

• Connecting wire and conduit

• Fuel supply valves/plumbing

• Crane, lifting straps, chains or cables

• Two 60” lengths of 3/4” nominal minimum scheduled
40 steel pipe (NOT conduit)

• Torque screwdriver, 5 to 50 inch-pound range

• Voltage/frequency meter

• Remote wireless monitor (OPTIONAL)

• Antenna (OPTIONAL)

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Controls

8kW Generator

Read this Operator’s Manual and Important Safety Instructions before operating your generator.

Compare the illustrations with your generator to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.

E

D

F

C

B

A

Generator is shown with roof and access covers removed
for clarity.

(A) - Lifting Holes — Provided at each corner for

lifting generator.

(B) - Exhaust Port — High-performance muffler lowers

engine noise to comply with most residential codes.

(C) - Alternator — An electrical machine that generates an

alternating current.

(D) - Spark Plug — A device in the cylinder head of the

engine that ignites the fuel mixture by means of an
electric spark.

G

H

J

(E) - Air Cleaner — Uses a dry type filter element and foam

precleaner to protect engine by filtering dust and debris
out of intake air.

(F) - Control Panel — Used for various test, operation and

maintenance functions. See System Control Panel.

(G) - Circuit Breaker — Protects the system from shorts and

other over-current conditions.

(H) - Battery (installer supplied) — 12 Volt DC, top-post

automotive style battery provides power to start the
engine.

(J) - Fuel Inlet Port — Attach appropriate fuel supply to

generator here.

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10kW Generator

Read this Operator’s Manual and Important Safety Instructions before operating your generator.

Compare the illustrations with your generator to familiarize yourself with the locations of various controls and
adjustments. Save this manual for future reference.

E

D

F

G

B

A

Generator is shown with roof and access covers removed
for clarity.

(A) - Lifting Holes — Provided at each corner for

lifting generator.

(B) - Exhaust Port — High-performance muffler lowers

engine noise to comply with most residential codes.

(C) - Alternator (Not Shown) — An electrical machine that

generates an alternating current.

(D) - Spark Plug — A device in the cylinder head of the

engine that ignites the fuel mixture by means of an
electric spark.

H

J

(E) - Air Cleaner — Uses a dry type filter element and foam

precleaner to protect engine by filtering dust and debris
out of intake air.

(F) - Control Panel — Used for various test, operation and

maintenance functions. See System Control Panel.

(G) - Circuit Breaker — Protects the system from shorts and

other over-current conditions.

(H) - Battery (installer supplied) — 12 Volt DC, top post

automotive style battery provides power to start the
engine.

(J) - Fuel Inlet Port — Attach appropriate fuel supply to

generator here.

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Access Ports

The generator is equipped with an enclosure that has several access panels, as shown.

(A) Front Panel that is used to access:

• Battery Compartment

• Engine Oil Drain Hose

• Engine Oil Filter

• Engine Valve Cover

• Spark Plugs

Each generator is shipped with a set of identical keys.

A

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To remove roof:

1. Remove the five screws (A) that secure the roof to the

unit.

A

2. Carefully lift and remove roof from unit.

To remove front panel:

1. Remove the two screws (B) that secure the panel to the

unit.

B

C

2. Lift and flex panel outward and off base. Use caution

not to damage the battery box (C).

To secure front panel:

1. Place panel in unit.

2. Secure the panel with two screws.

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System Control Panel

Compare this control panel illustration with your generator to familiarize yourself with the location of these important controls:

F

MENU

A

ESC

E

B

AUTO OFF

C

A - Menu/Programming Navigation Buttons — See Menu

section for details

B - USB Port — Authorized Dealer Service Use Only
C - Generator Operation Control Buttons —

•“AUTO” Normal operating position. Press and hold

button to put unit into Automatic mode. If an utility
power outage is sensed, the system will start the
generator. When utility power is restored, auto lets the
engine stabilize internal temperatures, shuts off the
generator, and waits for the next utility outage.

•“OFF” Turns off running generator, prevents unit from

starting, and resets any detected service codes.

OFF must be pressed and held for more than 5

seconds in order to reset service codes.

•“MANUAL” Used to manually start the generator.
“AUTO” LED — LED will light when unit is placed into

Auto mode. LED will blink if exercise cycle is not set
or set to OFF.

D

MANUAL

D - 15 Amp Fuse — Protects the home generator DC control

circuits. If the fuse has ‘blown’ (melted open) or was
removed, the engine cannot crank or start. Replace the
fuse using only an identical ATO 15A fuse. One spare
fuse is supplied with the unit.

E - Cover — This protective cover must be opened to access

the fuse and the USB port.

F - Digital Display — Displays generator mode, menu

options, service codes, and service engine indicators

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Menu

The following chart shows the icons for the buttons that control the system control panel.

MENU

ESCAPE (EXIT) RETURN TO LAST MENU ITEM

RIGHT ARROW

LEFT ARROW

MANUAL MODE

OFF

AUTOMATIC MODE

ENTER THE MENU (VIEW SETTINGS)
PRESS TO CONFIRM SELECTION WHEN PROGRAMMING.

TOGGLE THROUGH MENU OPTIONS
SETTING SYSTEM PARAMETERS

TOGGLE THROUGH MENU OPTIONS
SETTING SYSTEM PARAMETERS

USED TO MANUALLY START THE GENERATOR. PRESS AND HOLD BUTTON
TO START THE GENERATOR.

TURNS OFF RUNNING GENERATOR, PREVENTS UNIT FROM STARTING, AND
RESETS ANY DETECTED Service codeS.

NORMAL OPERATING POSITION. PRESS AND HOLD BUTTON TO PUT UNIT
INTO AUTOMATIC MODE. IF A UTILITY POWER OUTAGE IS SENSED, THE
SYSTEM WILL START THE GENERATOR. WHEN UTILITY POWER IS
RESTORED, AUTO LETS THE ENGINE STABILIZE INTERNAL TEMPERATURES,
SHUTS OFF THE GENERATOR, AND WAITS FOR THE NEXT UTILITY POWER
OUTAGE.

The following chart describes key sequences for accessing different programming modes;

GENERAL

SET-UP

ADVANCED

SETTINGS

WIRELESS

LINK MODE

PRESS AND HOLD [ARROW LEFT AND ARROW RIGHT] FOR THREE
SECONDS TO ENTER THE PROGRAM MODE.

PRESS AND HOLD [ARROW LEFT, ARROW RIGHT AND ESC] FOR
THREE SECONDS TO ENTER THE ADVANCED SETTINGS MODE.

PRESS AND HOLD [MENU AND ESC] FOR THREE SECONDS TO
ENTER THE WIRELESS LINKING MODE.

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General Set Up Screen

For general set up, press and hold the left arrow and right arrow for 3 seconds. Follow the prompts as outlined below.

NOTE: Date and Time were set at the factory and stored in the control panel memory. The Exercise Cycle was also set at
the factory. The default exercise cycle occurs on Tuesdays, at 2:00 P.M. Central Standard Time. To update or change these
settings, follow the steps below.

SET DATE

or

SET TIME

or

YEAR

FLASHING

or or or

HOURS

FLASHING

or or or

or

MONTH

FLASHING

MINUTES

FLASHING

DAY##

FLASHING

AM/PM

FLASHING

If set to OFF, display will read:

EXERCISE CYCLE OFF

or

SET EXERCISE CYCLE

EVENT LOG

DAY OF WEEK

FLASHING

or or or or

Display will scroll last service code event, date, time,

and ambient temperature of when the event occurred.

HOURS

FLASHING

MINUTES

FLASHING

AM/PM

FLASHING

or

IF DURING PROGRAMMING NO BUTTONS ARE PRESSED FOR 30 SECONDS,

THE CONTROL PANEL WILL AUTOMATICALLY EXIT THE PROGRAM MODE.

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Control Panel Prompts

Automatic Mode

In Automatic Mode, the display screen will display via
scrolling text:

• GENERATOR READY - if the unit is in standby and
utility power is present.

• GENERATOR ON - if the unit is running and utility
power is not present.

• SERVICE CODE - if a system service code has been
detected.

General System Parameters

To view general system parameters, press the MENU button.
The following will scroll across the digital display and then

move to the next item:

• Run time

• Date

• Time

• Exercise Cycle date and start time

The user can press the LEFT ARROW or RIGHT ARROW at
any time to move to the next item.

The user can press ESCAPE to go back to GENERATOR
READY.

If no user inputs are made for 10 seconds after all the items
have been displayed, the control board will reset to

GENERATOR READY.

AUTOMATIC MODE

GENERATOR READY OR SERVICE CODE DESCRIPTION

(When Generator NOT Running - Auto Mode)

GENERATOR ON

(When Generator Running - Auto Mode)

(MENU)

RUN TIME

or

DATE

or

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or

EXERCISE CYCLE

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Operation

Important Owner’s Considerations

Engine Oil

NOTICE Any attempt to crank or start the engine before it
has been properly serviced with the recommended oil will
result in equipment failure.

• DO NOT attempt to crank or start the engine before it has
been properly serviced with the recommended oil. This
may result in an engine failure.

• Damage to equipment resulting from failure to follow this
instruction will void generator warranty.

Automatic Operation Sequence

The generator’s control board constantly monitors utility
voltage. Should utility voltage drop below a preset level, the
control board will signal the engine to crank and start.

CAUTION With the system switch set to AUTO, the

engine could crank and start at any time without
warning, resulting in minor or moderate injury.

• To prevent possible injury that may be caused by such

sudden starts, always set the system switch to OFF if
performing maintenance on the system.

• Remove the 15 Amp fuse before working on or around
the generator or transfer switch.

The engine is shipped from the factory pre-run and filled
with synthetic oil (API SJ/CF 5W-30). This allows for system
operation in a wide range of temperature and climate
conditions. Before starting the engine, check oil level and

ensure that engine is serviced as described in Maintenance.

Battery

The installer must supply a rechargeable 12 volt DC starting
battery. See Battery in Final Installation Considerations in the
installation manual.

WARNING Battery posts, terminals and related

accessories contain lead and lead compounds, chemicals
known to the State of California to cause cancer and
reproductive harm. Wash hands after handling.

With the battery installed, all wiring to transfer switch and
generator completed, utility power supplied to the automatic
transfer switch, and the unit in AUTO mode, the battery
receives a trickle charge while the engine is not running. The

trickle charge cannot be used to recharge a battery that is
completely discharged.

15 Amp Fuse

The generator’s 15 Amp fuse is critical to correct system
operation. The 15 Amp fuse was removed at the factory to
prevent the unit from starting during shipping. Your installer
will ensure the fuse is properly installed upon completion of
the installation.

When utility voltage is restored above a preset voltage level,
the engine is signaled to shut down.

The actual system operation is not adjustable and is
sequenced by sensors and timers on the control board,
as follows:

Utility Voltage Dropout Sensor

• This sensor monitors utility source voltage.

• If utility source voltage drops below about 70 percent
of the nominal supply voltage, the sensor energizes
a 3 second timer. The timer is used to ‘sense’
brown-outs.

• Once the timer has expired, the engine will crank
and start.

Utility Voltage Pickup Sensor

This sensor monitors utility power voltage. When utility
voltage is restored above 80 percent of the nominal source
voltage, a time delay starts timing and the engine will go to
engine cool-down.

Engine Cool-down Timer

When utility power is sensed and the load transfers to the
utility source, the engine will go into a cool down period as
described below:

• If the generator has run for MORE than 5 minutes, once
the utility transfer occurs, the engine will continue to
run for about 1 minute before shutting down.

• If the generator has run for LESS than 5 minutes, once
the utility transfer occurs, the engine will continue to

run until 5 minutes has elapsed before shutting down.

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Setting Exercise Timer

The generator is equipped with an exercise timer. During the
exercise period, the unit runs for approximately 20 minutes
and then shuts down. Electrical load transfer DOES NOT
occur during the exercise cycle (unless an utility power
outage occurs).

The generator will only enter the exercise cycle if the unit is
in the AUTO mode and this exact procedure is followed.

To set the exercise timer:

NOTICE The generator is set with a deservice code exercise
cycle setting of Tuesday at 2:00 P.M, Central Time. To
change the cycle setting, proceed to the following steps:

1. Choose the day and time you want your generator to
exercise.

2. Press and hold the left arrow and right arrow
simultaneously for 3 seconds to enter the General Set­Up program mode. See General Set-Up flow chart in
Menu Section.

3. Verify and/or set the time and date on the unit.

4. Go to the SET EXERCISE prompt and hit the “OK”
button.

NOTICE Items will flash until they are selected.

SELECT DAY: Use the left or right arrow to toggle

through the days of the week, Once the day is selected,
hit the “OK” button.

SELECT HOUR: Use the left or right arrow to toggle

through between 1 and 12. Choose the hour of day you
want the generator to exercise then hit the “OK” button.

SELECT MINUTE: Use the left of right arrow to toggle

between :00 and :59. Choose the minute of the day you
want the generator to exercise then hit the “OK” button.

SELECT AM/PM: Use the left of right arrow to toggle

between AM and PM. Once chosen, hit the “OK” button.

NOTICE During the weekly exercise cycle, the generator will
run for 20 minutes, but it will not supply power to the home.
During the exercise cycle, the in-home monitor will continue
blinking the GENERATOR READY green LED.

If you want to change the day and time the unit exercises,
simply perform the procedure again.

To turn off the generator exercise cycle, go to the OFF
selection within the day of the week menu and press OK. The
display will then scroll: EXERCISE CYCLE OFF.

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Maintenance

Servicing the System

Before performing any generator maintenance, always
perform the following steps:

1. Set generator’s circuit breaker to its OFF position.

2. Press and hold the control board OFF button.

3. Remove 15 Amp fuse from control board.

4. Utility voltage is present at generator control board.
Disconnect power before servicing control board by
removing the fuses from the transfer switch.

5. After all servicing has been completed, replace fuses in
transfer switch, replace 15 Amp fuse in control board,
set circuit breaker ON and press and hold control board
AUTO button.

Service Code Detection System

The generator may have to run for long periods of time
with no operator present. For that reason, the system is
equipped with sensors that automatically shut down the
generator in the event of potentially damaging conditions,
such as low oil pressure, high temperature, over speed, and
other conditions.

The generator’s control board shows service code
descriptions scrolling across the digital display. The service
code descriptions are listed below:

• Low Battery Voltage

• Low Oil Pressure

• Under Voltage

• Over Voltage

• Engine Does Not Start

• Low Frequency

• Engine Overspeed

• High Oil Temperature

• Transfer Switch Service code

• No Wireless Communication (if applicable)

• Battery Charge Circuit

Reset Service Code Detection System

The operator must reset the service code detection system
each time it activates. To do so, press the control board
OFF button for 5 seconds. Once the display turns off, leave
it off for at least 30 seconds. Remedy the service condition,
then return the home generator to service by pressing and
holding the control board AUTO button and installing the 15
Amp fuse (if removed).

Low Battery Voltage

This service code is indicated by Low Battery Voltage
scrolling across the digital display. This condition occurs if
the battery voltage drops below the preset value. Causes for
this problem may be an inoperative battery or battery charge
circuit. See Battery Charge Circuit.

Remove the 15 Amp fuse and disconnect the battery from
the generator. Test the battery voltage. If voltage meets
specifications, take the battery to a local battery store for
analysis. Or contact your local service center for assistance.

Reinstall the battery (replace if necessary - see Battery in
Final Installation Considerations in the installation manual).
Then reset the service code detection system, as described
earlier.

Low Oil Pressure

This service code is indicated by Low Oil Pressure scrolling
across the digital display. The unit is equipped with an oil
pressure switch that uses normally closed contacts held
open by engine oil pressure during operation. Should oil
pressure drop below the 8 psi range, switch contacts close
and the engine will shut down.

To remedy the low oil pressure condition, add the
recommended oil to the FULL mark on the dipstick.

If the low oil pressure condition still exists, the engine will
start, then shut down again. The service code code will
appear again. In this case, contact an authorized dealer.

Under Voltage

This service code is indicated by Under Voltage scrolling
across the digital display. This condition is caused by
a restriction in the fuel flow, the electronic governing
system not functioning properly, a broken or disconnected
signal lead, a failed alternator winding or the generator is
overloaded.

To remedy the problem, contact your installer or an
authorized dealer.

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Over Voltage

This service code is indicated by Over Voltage scrolling
across the digital display. This feature protects devices
connected to the transfer switch by shutting the generator
down if the generator output voltage happens to increase
above the preset limit.

This condition is most likely caused by a failed voltage
regulator, alternator excitation circuit or a load imbalance. To
remedy the problem, contact your installer or an
authorized dealer.

Engine Does Not Start

This service code is indicated by Engine Does Not Start
scrolling across the digital display. This feature prevents the
generator from damaging itself if it continually attempts to
start in spite of another problem, such as no fuel supply.
Each time the system is directed to start, the unit will
crank for 10 seconds, pause for 10 seconds, and repeat.
If the system does not begin producing electricity after
approximately 2 minutes, the unit will stop cranking.

The most likely cause of this problem is no fuel supply or
incorrect fuel setting. See Fuel Conversion in the installation
manual. Check the internal and external fuel shut off valves
to ensure they are fully open. Other causes could be failed
spark plug(s), a failed engine ignition, or the engine air
filter is clogged. You may need to contact your installer for
assistance if you can’t remedy these problems.

Low Frequency

This service code is indicated by Low Frequency scrolling
across the digital display. This feature protects devices
connected to the transfer switch by shutting the generator
down if the engine runs slower than 55 Hz for three seconds.
This condition is caused by a failed engine component, or by
excessive loads on the generator. To resolve the problem,
contact your installer or an authorized dealer.

Engine Overspeed

This service code is indicated by Engine Overspeed scrolling
across the digital display. To resolve the problem, contact
your installer or an authorized dealer.

High Oil Temperature

This service code is indicated by High Oil Temperature
scrolling across the digital display. The contacts of the
temperature switch are normally open. If the engine
temperature increases past a determinded temperature, the
service code is detected and the engine shuts down.

Common causes for this condition include running the unit
with access panels removed, obstructed air inlet or exhaust
port, or debris in the engine compartment or running unit
with roof open.

To resolve the problem, let the engine cool down and remove
any accumulated debris and obstructions. Ensure that the
access panels are installed and the roof is closed whenever
the unit is running. If problem persists, contact your installer
or authorized dealer.

Transfer Switch Service code

This service code is indicated by Transfer Switch Service
code scrolling across the digital display (if transfer switch is

equipped with service codedetection).
The most likely cause of this service code is a blown fuse

in the transfer switch. To remedy the problem, contact your
installer or an authorized dealer.

No Wireless Communication (if applicable)

This service code is indicated by No Monitor Communication
scrolling across the digital display. The SERVICE NEEDED red
LED on the wireless monitor will flash 20 fast pulses, pause
5 seconds, and repeat if there is a loss in communication
between the wireless monitor and the generator.

To resolve the problem, move the wireless monitor closer to
generator. Re-link if necessary.

Battery Charge Circuit

This service code is indicated by Battery Charge Circuit
scrolling across the digital display. The most likely cause is
an electrical problem with the control panel. To remedy the
problem, contact your installer or an authorized dealer.

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Maintenance Schedule

Follow the hourly or calendar intervals of operation,
whichever occurs first.

First 5 Hours
Change Engine Oil
Every 8 Hours or Daily
Clean Debris
Check Engine Oil Level
Every 100 Hours or Annually
Change Air Filter
Change Engine Oil and Filter
Replace Spark Plugs
Check Valve Clearance
Check Torque of Engine End Cover Bolts
Check Circuit Breaker Torques
Annually
Clean Oil Cooler Fins

Test System Operation (Simulate a Power Outage)

When all engine servicing is complete, replace 15 Amp fuse
in control panel and reset the exercise timer. See Setting
Exercise Time in Operation.

Regular maintenance will improve the performance and
extend life of the generator. See any authorized dealer for
service.

Emissions Control
Maintenance, replacement, or repair of the emissions

control devices and systems may be performed by any non­road engine repair establishment or individual.

However, to obtain “no charge” emissions control service,
the work must be performed by a factory authorized dealer.
See the Emission Warranty.

Generator Maintenance

WARNING Unintentional sparking could cause fire or electric

shock resulting in death or serious injury.

WHEN ADJUSTING OR MAKING REPAIRS TO YOUR GENERATOR

• Disconnect the spark plug wire from the spark plug and place
the wire where it cannot contact spark plug.

WHEN TESTING FOR ENGINE SPARK

• Use approved spark plug tester.

• DO NOT check for spark with spark plug removed.

The generator’s warranty does not cover items that have
been subjected to operator abuse or negligence. To receive
full value from the warranty, the operator must maintain the
generator as instructed in this manual.

Some adjustments will need to be made periodically to
properly maintain your generator.

All service and adjustments should be made at least once
each season. Follow the requirements in the Maintenance
Schedule chart.

Generator maintenance consists of keeping the unit
clean. Operate the unit in an environment where it will
not be exposed to excessive dust, dirt, moisture or any
corrosive vapors. Cooling air louvers on the enclosure
must not become clogged with snow, leaves, or any other
foreign material. To prevent generator damage caused by
overheating, keep the enclosure cooling inlets and outlets
clean and unobstructed at all times.

Check the cleanliness of the unit frequently and clean when
dust, dirt, oil, moisture or other foreign substances are visible
on its exterior/interior surface. Inspect the air inlet and outlet
openings inside and outside the enclosure to ensure air flow
is not blocked.

DO NOT use direct spray from a garden hose to clean
generator. Water can enter the engine and generator and
cause problems.

NOTICE Improper treatment of generator could damage it
and shorten its life.

• DO NOT expose generator to excessive moisture, dust, dirt, or
corrosive vapors.

• DO NOT insert any objects through cooling slots.

Clean the generator as follows:

1. Press and hold the control board OFF button.

2. Remove 15 Amp fuse from control board.

3. Clean generator as desired.

• Use a damp cloth to wipe exterior surfaces clean.

• Use a soft, bristle brush to loosen caked on dirt, etc.

• Use a vacuum cleaner to pick up loose dirt and debris.

• Use low pressure air (not to exceed 25 psi) to blow

away dirt. Inspect cooling air slots and openings on
the generator. These openings must be kept clean and
unobstructed.

4. Reinstall 15 Amp fuse in control board.

5. Press and hold the control board AUTO button.

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Battery

Engine Maintenance

WARNING Battery posts, terminals and related

accessories contain lead and lead compounds, chemicals
known to the State of California to cause cancer and
reproductive harm. Wash hands after handling.

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

Servicing the Battery

If it is necessary to service the battery, proceed as follows:

1. Press and hold the control board OFF button.

2. Remove 15 Amp fuse from control panel.

3. Service or replace battery as required. See Battery
in Final Installation Considerations in the installation
manual for specific battery needed.

4. Connect red battery cable to battery positive terminal
(indicated by POSITIVE, POS, or (+)).

6. Connect black negative battery cable to negative battery
terminal (indicated by NEGATIVE, NEG, or (-).

7. Ensure hardware on both positive and negative battery
terminals is secure.

8. Reinstall 15 Amp fuse in control panel.

9. Press and hold the control board AUTO button.

DON’T POLLUTE. CONSERVE RESOURCES, RETURN
USED BATTERY TO RECYCLING COLLECTION
CENTER.

Charging the Battery

If it is necessary to charge the battery, proceed as follows:

1. Press and hold the control board OFF button.

2. Remove 15 Amp fuse from control board.

3. Disconnect negative battery cable from negative battery
terminal (indicated by NEGATIVE, NEG, or (-)).

NOTICE Failure to disconnect negative battery cable could
result in equipment failure.

• DO NOT attempt to jump start the generator.

• Damage to equipment resulting from failure to follow this

instruction will void engine and generator warranty.

4. Charge battery with battery charger at 2 Amps until
battery holds 12 Volts. DO NOT exceed 13.7 volts
when charging.

NOTICE DO NOT use a battery booster to quick charge a low
battery.

5. Connect negative battery cable to negative battery
terminal (indicated by NEGATIVE, NEG, or (-)).

6. Ensure hardware on both positive and negative battery
terminals is secure.

7. Reinstall 15 Amp fuse in control board.

8. Press and hold the control board AUTO button.

Adjust Valve Lash

The valve lash must be checked every 100 hours of operation.
Measure valve clearance with the engine cold.

To adjust the valve lash, proceed as follows:

1. Remove spark plug(s) to ease manual rotation of engine
crankshaft.

2. Turn crankshaft counterclockwise until the piston is at Top
Dead Center on the compression stroke.

3. Insert a narrow screwdriver or rod into spark plug hole as
a gauge, then slowly turn crankshaft counterclockwise until
the piston has moved down the bore by 1/4”.

4. For the Model 31 Engine:

• Use a feeler gauge (A), measure the valve clearance.

A

B

Model 31

• Adjust the rocker nut to obtain the correct clearance as
follows: 0.005 (0.013 mm) intake and

0.007 (0.018 mm) exhaust.

• Hold rocker nut and tighten the rocker ball set screw (B)
to 45 in/lb (5 Nm).

5. For the Model 35 Engine:

• Use a feeler gauge (A) to measure the valve clearance.

B

A

Model 35

• Adjust the clearance by loosening the lock nut (B) then
turn the adjusting screw (C) to obtain the following
measurement: 0.005 in. (0.013 mm) intake and exhaust.

• Once the clearance is properly set, hold the adjusting
screw while torqueing the lock nut to 70 in/lbs. (8 Nm).

6. Repeat for the other valve, if applicable.

C

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Engine Oil

The engine is filled with synthetic oil (API SJ/CF 5W-30).
This allows for system operation in the widest range of
temperature and climate conditions.

We recommend the use of Briggs & Stratton Warranty
Certified oils for best performance. Other high-quality
detergent oils are acceptable if classified for service SJ or
higher. DO NOT use special additives.

Outdoor temperatures determine the proper oil viscosity for
the engine. Use the chart to select the best viscosity for the
outdoor temperature range expected.

Checking/Adding Engine Oil

1. Open roof to access dipstick and oil fill area.

2. Clean the oil fill area of any debris.

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

4. Fully insert dipstick into oil fill.

5. Remove dipstick and check oil level. Verify oil is at Full
mark on dipstick.

6. If needed, slowly pour recommended oil into oil fill
opening. DO NOT overfill. After adding oil, wait one
minute and recheck oil level.

* Below 40°F (4°C) the use of SAE 30 will result in hard starting.

** Above 80°F (27°C) the use of 10W30 may cause increased oil

consumption. Check oil level more frequently.

NOTICE Overfilling with oil could cause the engine to not
start, or hard starting.

• DO NOT overfill.

• If over the FULL mark on dipstick, drain oil to reduce oil level to

FULL mark on dipstick.

7. Replace oil dipstick.

8. Close roof and secure.

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Changing Engine Oil and Oil Filter

CAUTION Avoid prolonged or repeated skin contact with

used motor oil.

• Used motor oil has been shown to cause skin cancer in certain
laboratory animals.

• Thoroughly wash exposed areas with soap and water.

KEEP OUT OF REACH OF CHILDREN. DON’T
POLLUTE. CONSERVE RESOURCES. RETURN USED
OIL TO COLLECTION CENTERS.

NOTICE Any attempt to crank or start the engine before it has
been properly serviced with the recommended oil will result in
equipment failure.

• DO NOT attempt to crank or start the engine before it has
been properly serviced with the recommended oil. This
may result in an engine failure.

• Damage to equipment resulting from failure to follow this
instruction will void engine and generator warranty.

Change the oil while the engine is still warm from running,
as follows:

1. Press and hold the control board OFF button.

2. Remove 15 Amp fuse from control board.

3. Place oil drain hose into an approved container.

4. Remove brass fitting from end of drain hose and drain

oil into an approved container.

5. When oil has drained, replace brass fitting on hose.

6. Place an approved container under oil filter.

7. Remove oil filter and dispose of properly.

8. Before installing a new oil filter, lightly lubricate the oil

filter gasket with fresh, clean oil.

9. Install the oil filter by hand until the gasket contacts

the oil filter adapter, then tighten the oil filter 1/2 to 3/4
turn.

10. Add oil.

11. Remove container from under oil filter and clean up any

spilled oil.

12. Start and run engine. As engine warms up, check for oil

leaks.

13. Stop engine, wait for oil to settle, check oil level and

add if necessary.

Service Air Cleaner

Your engine will not run properly and may be damaged if
you run it with a dirty air cleaner. Clean or replace more
often if operating under dusty or dirty conditions.

To service the air cleaner, follow these steps:

1. Remove the knobs and the cover.

2. Remove air filter.

3. To loosen debris, gently tap air cleaner on a hard
surface. If air cleaner is excessively dirty, replace with a
new air cleaner.

4. Install the air filter.

5. Install the cover and secure with knobs.

NOTICE

same position as the original parts.

Replacement parts must be the same and installed in the

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Fuel System Inspection and Maintenance

Natural Gas/Propane Fuel System

The fuel system installed on this engine has been designed
to various standards to ensure performance and reliability.
To ensure compliance to these standards, follow the
recommended maintenance schedule contained in this
section.

NOTICE The fuel system components have been
specifically designed and calibrated to meet the fuel system
requirements of the engine. If a fuel system component
fails to operate or develops a leak, it should be repaired or
replaced with the OEM recommended replacement parts.

Pressure Regulator Maintenance and Inspection

• Check for any fuel leaks at the inlet and outlet fittings.

• Check for any fuel leaks in the regulator body.

• Check to ensure the regulator is securely mounted and
the mounting bolts are tight.

• Check the regulator for external damage.

Service Spark Plugs

Changing the spark plugs will help your engine to start easier
and run better.

1. Clean area around spark plugs.

2. Remove and inspect spark plugs.

3. Check electrode gap with wire feeler gauge and reset
spark plug gap to recommended gap if necessary (see
Specifications).

4. Replace spark plugs if electrodes are pitted, burned
or porcelain is cracked. Use the recommended
replacement spark plugs. See Specifications.

5. Install spark plugs and tighten to 180 in/lbs (20 Nm).

Venturi/Throttle Control Device Maintenance and
Inspection

NOTICE A dirty air cleaner may significantly alter the venturi
performance.

• Leaks at all fittings.

• Ensure the venturi and throttle body are securely
mounted.

• Inspect air cleaner element according to the
recommended maintenance schedule found in this
section.

• Inspect air inlet hose connection and clamp. Inspect
hose for cracking, splitting, or chaffing, Replace if any
of these conditions exist,

• Check fuel line for cracking, splitting, or chaffing.
Replace if any of these conditions exist.

• Check for leaks at the throttle body and intake manifold.

Exhaust System Maintenance and Inspection

When inspecting the exhaust system, check the following:

• Inspect exhaust manifold at the cylinder head for leaks
and that all retaining bolts and shields (if used) are in
place.

• Inspect muffler for exhaust leaks. Repair as necessary.

When all engine servicing is complete, replace 15 Amp fuse
in control board and reset exercise timer.

Clean Air Cooling System and Oil Cooler Fins

Over time debris may accumulate in cylinder cooling fins
and cannot be observed without partial engine disassembly.
Unobstructed air flow is critical for correct generator
operation. For this reason, we recommend you have an
authorized service dealer clean the cooling system per
recommended intervals (see Maintenance Schedule in the
Maintenance section). Equally important is to keep top of
engine free from debris. Make sure the oil cooler fins are free
of dirt and debris. Also see Cleaning.

When Calling for Assistance

You must have the following information at hand if it is
necessary to contact a local service center regarding
service or repair of this unit:

1. Obtain the unit Model Number and Serial Number from
the unit ID label. See Controls for location of the label
or refer to the information recorded on the inside from
cover of the installation manual.

2. Obtain the engine identification numbers from the
engine label. See the operator’s manual for location of
this information.

Engine Exterior

Periodically inspect the engine exterior for contamination
and potential damage from dirt, leaves, rodents, spider webs,
insects, etc. and remove.

27

Storage

The home generator system is designed for long term service
as a backup generator. There is no need to take any storage
precautions. However, if it becomes necessary to take the
system out of service for an extended period, call Technical
Services at 888575-8226, between 8:00 AM and 5:00 PM CT
for specific recommendations.

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Troubleshooting

Problem Cause Correction

Engine is running, but no AC output is available.

Engine runs well at no-load but “bogs down”
when loads are connected.

Engine will not start; or starts and runs rough.

Engine shuts down during operation.

1. Circuit breaker open or defective.

2. Service code in generator control board.

3. Poor wiring connections or defective
transfer switch.

1. Generator is overloaded.

2. Short circuit in a connected load.

3. Shorted generator circuit.

4. Fuel pressure or mixture isincorrect.

5. Kinked fuel line between regulator and
engine.

1. 15 Amp fuse missing or blown.

2. Fuel supply turned off or depleted.

3. Failed battery.

4. Clogged air filter.

1. Fuel supply turned off or depleted.

2. Control board digital display shows a
service code.

1. Reset or replace circuit breaker.

2. Contact local service provider.

3. Check and repair or contact local service
facility.

1. Remove one or more loads.

2. Disconnect shorted electrical load.

3. Contact local service facility.

4. See Gaseous Fuel System in the installation
manual.

5. Remove kink. Replace if necessary.

1. Install (new) 15 Amp fuse. See System
Control Board

2. Open fuel valve(s); check propane tank

3. Replace battery.

4. Clean or replace air filter.

1. Check fuel valves, fill propane tank.

2. Refer to Service code Detection System.

Loss of power on circuits.

Unit will not exercise.

Excessive Vibration

Odor of fuel

Utility power returns, unit does not stop

1. Generator circuit breaker is open.

2. Transfer switch problems.

1. Control board not set to AUTO.

2. Exercise timer not set or set to OFF.

3. Unit date and time not set.

4. Failed battery.

5. 15 Amp fuse missing or blown.

1. Loose mechanical fastener. 1. Check and repair or contact local service

1. Fuel leak. 1. Turn off manual shutoff fuel valve. Contact

1. Blown fuses in transfer switch.

2. 5 minute minimum runtime not lapsed.

3. Poor wire connection or defective
controllers.

1. Reset circuit breaker.

2. See transfer switch manual.

1. Press AUTO button on control board.

2. Set exercise timer.

3. Set unit date and time.

4. Replace battery.

5. Install (new) 15 Amp fuse. See System
Control Board.

facility.

local service facility.

1. Install (new) fuses.

2. Wait 5 minutes.

3. Check, repair or contact local service facility.

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U.S. EPA, and Briggs & Stratton Corporation Emissions Control Warranty Statement for Emergency Standby Engines

Your Warranty Rights And Obligations

January 2014

General Information

The U.S. EPA, and Briggs & Stratton (B&S) are pleased to explain the
emissions control system warranty on your Model Year 2014 - 2015
engine / equipment. In the U.S., new Emergency Standby Engines
must be designed, built, and equipped to meet stringent emission
standards. Engines less than 25 Hp must meet requirements of 40
CFR Part 1054. Engines greater than 25 Hp and less than 130 Hp
must meet requirements of 40 CFR Part 1048. B&S must warrant the
emissions control system on your engine / equipment.

See Definition of appropriate use of Emergency Standby below.

The emission-related warranty covers all components whose failure
would increase an engine’s non-evaporative emissions of any
regulated pollutant referenced below.

Manufacturer’s Warranty Coverage:

Briggs & Stratton warrants that the engine is free from defects in
material and workmanship, and is also designed, built, and equipped
to conform to applicable regulations under Section 213 of the Clean
Air Act, from the time the engine is sold, until the expiration of its
warranty period.

This warranty applies to all emission related engine components
whose failure would cause engine exhaust emissions to be out of
EPA compliance. Further, this warranty also applies to other engine
components damaged due to the failure of any of these emissions
related components.

If a warrantable emissions related component on your engine is
defective, the part will be repaired or replaced by B&S at no cost to
you including diagnosis, parts, and labor.

Warranty coverage period is four years from date of original
purchase, and is offered to the original purchaser and each
subsequent purchaser so long as Owner’s Warranty Responsibilities
are adhered to.

Owner’s Warranty Responsibilities:

• Warranty claims shall be filed according to the provisions of the
Briggs & Stratton Warranty Policy.

• An engine may not be warrantable if subjected to abuse,
misuse, neglect, improper maintenance, unapproved
modifications, accidents not caused by Briggs & Stratton
engines or equipment, or by acts of God.

• Only those engines used as an Emergency Stationary Engine, as
defined below, are warrantable.

• You are responsible for presenting your engine / equipment to
a B&S distribution center, servicing dealer, or other equivalent
entity, as applicable, as soon as a problem exists. The warranty
repairs should be completed in a reasonable amount of time,
not to exceed 30 days. If you have any questions regarding your
warranty rights and responsibilities, you should contact B&S at
1-800-233-3723 or BRIGGSandSTRATTON.COM.

• If any components not scheduled for maintenance is repaired
or replaced under this warranty, the new part will be warranted
only for the remaining warranty period.

• If a warrantable component scheduled for maintenance fails
prior to its first scheduled replacement, the part will be repaired
or replaced by B&S at no charge to the owner. Any such
component is only warrantable until the originally scheduled
maintenance period has expired.

• Add on or modified parts that are not exempted by the EPA may
not be used. The use of any non-exempted add on or modified
parts by the owner will be grounds for disallowing a warranty
claim. The manufacturer will not be liable to warrant failures or
warranted parts caused by the use of a non-exempted add on or
modified part.

Emergency Stationary Engine Definition

An Emergency Stationary Engine is defined as any stationary internal combustion engine whose operation is limited to emergency situations
and required testing and maintenance. Examples include stationary engines used to produce power for critical networks or equipment
(including power supplied to portions of a facility) when electric power from the local utility (or the normal power source, if the facility runs
on its own power production) is interrupted, or stationary engines used to pump water in the case of fire or flood, etc. Stationary engines
used for peak shaving are not considered emergency stationary engines. Stationary engines used to supply power to an electric grid or that
supply power as part of a financial arrangement with another entity are not considered to be emergency engines. Emergency stationary ICE
may be operated for the purpose of maintenance checks and readiness testing, provided that the tests are recommended by Federal, State or
local government, the manufacturer, the vendor, or the insurance company associated with the engine. Maintenance checks and readiness
testing of such units is limited to 100 hours per year. There is no time limit on the use of emergency stationary engines in emergency
situations. The owner or operator may petition the Administrator for approval of additional hours to be used for maintenance checks and
readiness testing, but a petition is not required if the owner or operator maintains records indicating that Federal, State, or local standards
require maintenance and testing of emergency ICE beyond 100 hours per year. Emergency stationary ICE may operate up to 50 hours per
year in non-emergency situations, but those 50 hours are counted towards the 100 hours per year provided for maintenance and testing.
The 50 hours per year for non-emergency situations cannot be used for peak shaving or to generate income for a facility to supply power to
an electric grid or otherwise supply power as part of a financial arrangement with another entity. For owners and operators of emergency
engines, any operation other than emergency operation, maintenance and testing, and operation in non-emergency situations for 50 hours
per year, as permitted above is prohibited.

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COVERAGE*

BRIGGS & STRATTON POWER PRODUCTS GROUP, LLC

STANDBY GENERATOR OWNER WARRANTY POLICY

LIMITED WARRANTY

Briggs & Stratton Power Products Group, LLC will repair or replace,
free of charge, any part(s) of the equipment that is defective in material
or workmanship or both. This warranty is effective for the time periods
and subject to the conditions stated below. For all warranty service,
find the nearest Authorized Service Dealer in our dealer locator map at
BRIGGSandSTRATTON.COM.

THERE IS NO OTHER EXPRESS WARRANTY. WARRANTY COVERAGE
FOR IMPLIED WARRANTIES, INCLUDING THOSE OF MERCHANTABILITY
AND FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO THE
WARRANTY PERIOD SET FORTH BELOW, OR TO THE EXTENT PERMITTED
BY LAW. LIABILITY FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES ARE
EXCLUDED TO THE EXTENT PERMITTED BY LAW.

WARRANTY PERIOD

United States and Canada

8kW and 10kW

PARTS 3 years †
LABOR 3 years †
TRAVEL 3 years † ‡

† Enclosure is warranted against surface rust and corrosion for the first

year of the warranty period. Surface rust and corrosion is defined as any
rust or corrosion that has penetrated the paint but has not penetrated
through the metal substructure.

Enclosure is warranted against rust-through for the first two years of the

warranty period. Rust-through is defined as rust or corrosion that has
penetrated completely through the paint and metal substructure.

† Accessory parts have a separate warranty. Refer to the warranty included

with the accessory part at purchase.

‡ Travel expenses are reimbursed as specified under the Briggs & Stratton

Warranty Guidelines document to authorized Briggs & Stratton dealers
for performing applicable warranty repair work.

PARTS 2 years or 600 hours † 2 years or 1000 hours †
LABOR 2 years or 600 hours † 2 years or 1000 hours †
TRAVEL 2 years or 600 hours † ‡ 2 years or 1000 hours † ‡

Some states or countries do not allow limitations on how long an implied
warranty lasts, and some states or countries do not allow the exclusion or
limitation of incidental or consequential damages, so the above limitation
and/or the above exclusion may not apply to you. This warranty gives you
specific legal rights and you may also have other rights which vary from
state to state or country to country.*

* In Australia - Our goods come with guarantees that cannot be excluded
under the Australian Consumer Law. You are entitled to a replacement or
refund for a major failure and for compensation for any other reasonably
foreseeable loss or damage. You are also entitled to have the goods
repaired or replaced if the goods fail to be of acceptable quality and
the failure does not amount to a major failure. For warranty service,
find the nearest Authorized Service Dealer in our dealer locator map at
BRIGGSandSTRATTON.COM, or by calling 1300 274 447, or by emailing
or writing to [e-mail], Briggs & Stratton
Australia Pty Ltd, 1 Moorebank Avenue, NSW, Australia, 2170.

International (Outside US and Canada)

8kW 10kW

The warranty period begins on the date of purchase by the first retail or
commercial customer. In order to ensure prompt and complete warranty

coverage, REGISTER YOUR PRODUCT IN ONE OF THREE WAYS:

1. ONLINE AT BRIGGSANDSTRATTON.COM, OR

2. MAIL THE COMPLETED REGISTRATION CARD, OR

3. CALL 800-732-2989

SAVE YOUR PROOF OF PURCHASE RECEIPT. IF YOU DO NOT PROVIDE
PROOF OF THE INITIAL PURCHASE DATE AT THE TIME WARRANTY
SERVICE IS REQUESTED, THE MANUFACTURING DATE OF THE PRODUCT
WILL BE USED TO DETERMINE THE WARRANTY PERIOD.

Registration is not required to obtain warranty service.

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ABOUT YOUR WARRANTY

Only authorized service dealers may perform warranty repairs. Most
warranty repairs are handled routinely, but sometimes requests for warranty
service may not be appropriate. For example, warranty service would not
apply if equipment damage occurred because of misuse, lack of routine
maintenance, and shipping, handling, warehousing or improper installation.
Similarly, warranty coverage will not be provided if the manufacturing date
or serial number(s) on the equipment has been removed or the equipment
has been altered or modified. During the warranty period, the authorized
service dealer, at its option, will repair or replace any part that, upon
examination, is found to be defective under normal use and service. This
warranty will not cover the following repairs due to:

1. Normal Wear and Maintenance: Outdoor Power Equipment and
engines, like all mechanical devices, need periodic parts and service
to perform well. This warranty does not cover repair when normal
use has exhausted the life of a part or the equipment. Typical wear
items include engine oil, oil gauges, o-rings, filters, fuses, spark
plugs, anti-freeze, starting batteries, etc. Normal maintenance
such as: adjustments, loose or leaking clamps or connections,
installation or start-up operations, fuel system cleaning and
obstruction due to contamination.

2. Installation, Operation, Maintenance and Storage: This warranty
does not apply to equipment or parts that have been subjected to
improper or unauthorized installation or alteration and modification,
abuse, misuse, negligence, accident, overloading, overspeeding,
improper maintenance, repair or storage so as to adversely affect
its performance and reliability.

3. Enclosure is not warranted for surface rust or corrosion or
complete rust-through that may result due to improper installation,
damage to painted surfaces that compromise the paint’s corrosion
prevention properties, or if the unit is installed in environments that
expose the generator to high levels of corrosive agents.

This warranty will not cover equipment used in:

1. Equipment used for prime power. For purposes of this warranty,
Prime Power is defined as an application in which the generator is a
source of power where no electrical power service is available from
the UTILITY POWER GRID. If no UTILITY power is available, the
generator is considered the prime power source.

2. Used, reconditioned, and demonstration equipment, or rental
equipment. Rental use means any use of this product in a
temporary or semi-permanently installed rental application.
Once equipment has experienced rental use, it shall thereafter be
considered rental equipment for purposes of thiswarranty.

3. Equipment used in life support applications.

4. Failures caused by any force majeure event or external force beyond
the manufacturer’s control or Act of God such as, but not limited
to freezing, theft, fire, collision, wars or riots, hail, water or flood
damage, tornados, hurricanes, or terrorist acts.

5. Use of non-original parts and non-authorized installation or
warranty service by unauthorized dealers.

6. Rodent and/or insect infestations.

This warranty also does not include:

1. Any and all expenses incurred investigating performance complaints
unless defective Briggs & Stratton materials and/or workmanship
were the direct cause of the problem.

2. The cost of rental equipment used while warranty repairs are being
performed (i.e., generators, pumps, etc.)

Warranty terms effective May 1, 2014.

80010905, Rev. A, 1 May 2014

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Generator Specifications

10kW Watt
Rated Maximum Load Current* (at 25°C/77°F, LP)*:

at 240 Volts ....................................................... 41.7 Amps

Rated AC Voltage ............................................. 120/240 Volts

Phase ................................................................. Single phase

Rated Frequency ....................................................... 60 Hertz

Generator Breaker ...................................................... 50 Amp

Normal Operating Range ... -20°F (-28.8°C) to 104°F (40°C)
Output Sound Level 72.3 dB(A) at 23 ft. (7 m) at normal load

Shipping Weight ............................................330 lb (149 kg)

* Natural gas rating will depend on specific fuel but typical derates are between 10 to

20% off the LP gas rating.

Engine Specifications

Displacement .................................................. 35 ci. (570 cc)

Bore ......................................................... 2.83 in. (71.9 mm)

Stroke ...................................................... 2.76 in. (70.1 mm)

Spark Plug Gap ...................................... 0.020 in. (0.51 mm)

Spark Plug Torque ....................................180 lb-in. (20 Nm)

Armature Air Gap ............ 0.005 - 0.008 in. (0.13 - 0.20 mm)

Intake Valve Clearance ................................ 0.005 (0.13 mm)

Exhaust Valve Clearance ........................ 0.005 in. (0.13 mm)

Oil Type ......................................................... 5W30 Synthetic

Oil Capacity (with filter) ..................................57.5 oz. (1.70 L)

8kW Watt
Rated Maximum Load Current* (at 25°C/77°F, LP)*:

at 240 Volts ....................................................... 33.3 Amps

Rated AC Voltage ............................................. 120/240 Volts

Phase ................................................................. Single phase

Rated Frequency ....................................................... 60 Hertz

Generator Breaker ...................................................... 35 Amp

Normal Operating Range ... -20°F (-28.8°C) to 104°F (40°C)
Output Sound Level 76.8 dB(A) at 23 ft. (7 m) at normal load

Shipping Weight ............................................340 lb (154 kg)

* Natural gas rating will depend on specific fuel but typical derates are between 10 to

20% off the LP gas rating.

Displacement .................................................. 31 ci. (500 cc)

Bore ......................................................... 3.56 in. (90.4 mm)

Stroke ...................................................... 3.06 in. (77.7 mm)

Spark Plug Gap ...................................... 0.020 in. (0.51 mm)

Spark Plug Torque ....................................180 lb-in. (20 Nm)

Armature Air Gap ............ 0.005 - 0.008 in. (0.13 - 0.20 mm)

Intake Valve Clearance ........................... 0.005 in. (0.13 mm)

Exhaust Valve Clearance ........................ 0.007 in. (0.13 mm)

Oil Type ......................................................... 5W30 Synthetic

Oil Capacity (with filter) .....................................48 oz. (1.42 L)

*This generator is rated in accordance with UL (Underwriters Laboratories) 2200 (stationary engine generator assemblies) to CSA (Canadian Standards
Association) standard C22.2 No. 100-04 (motors and generators).

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316793 Rev. A