Briggs & Stratton CE8070 User manual

BRIGGS & STRATTON CORPORATION
Milwaukee, WI 53201
Part No. 190275-5/03 Printed in U.S.A.
Look for these other repair manuals from the
Briggs & Stratton Power Products line:
B3277GS Pressure Washer Familiarization
& Troubleshooting Guide
86262 Generator Familiarization &
Troubleshooting Guide
275110 Outboard Motor Repair Manual
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Familiarization & Troubleshooting Guide
HAND-HELD GENERATOR
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FOREWORD
This guide has been written and published by Briggs & Stratton Corporation to aid our dealers’ mechanics and
company service personnel when servicing the products described herein.
It is assumed that these personnel are familiar with the servicing procedures for these products, or like or similar
products, manufactured by Briggs & Stratton Corporation. It is also assumed that they have been trained in the
recommended servicing procedures for these products, which includes the use of mechanics’ hand tools and any
special tools that might be required.
Proper service and repair is important to the safe, economical and reliable operation of all engine driven systems.
The troubleshooting, testing, service and repair procedures described in this guide are effective methods of
performing such operations.
We could not possibly know of and advise the service trade of all conceivable procedures or methods by which a
service might be performed, nor of any possible hazards and/or results of each procedure or method.We have not
undertaken any such wide evaluation.Therefore, anyone who uses a procedure or method not described by the
manufacturer must first satisfy himself that neither his safety, nor the safety of the product, will be endangered by
the service or operating procedure selected.
All information, illustrations, and specifications contained in this guide are based on the latest production
information available at the time of publication. However, Briggs & Stratton Corporation reserves the right to
change, alter, or otherwise improve the product at any time without prior notice.
Some components or assemblies of the product described in this guide may not be considered repairable.
Disassembly, repair and reassembly of such components may not be included in this guide.
Copyright © 2003 Briggs & Stratton Corporation
All rights reserved.
No part of this material may be reproduced or transmitted, in any form or by any means, electronic or
mechanical, including photocopying, recording or by any information storage and retrieval system, without prior
permission in writing from Briggs & Stratton Corporation.

Hand-Held Series Generator
Familiarization & Troubleshooting Guide
Electronic Version #190275 03/03
Please click the “Bookmarks” tab at left to enable the
search and navigational features of this document.
®

FORWARD
This guide has been written and published by Briggs & Stratton Corporation to aid our dealers' mechanics and
company service personnel when servicing the products described herein.
It is assumed that these personnel are familiar with the servicing procedures for these products, or like or similar
products, manufactured by Briggs & Stratton Power Products Group®. It is also assumed that they have been
trained in the recommended servicing procedures for these products, which includes the use of mechanics hand
tools and any special tools that might be required.
Proper service and repair is important to the safe, economical and reliable operation of all engine driven systems.
The troubleshooting, testing, service and repair procedures described in this guide are effective methods of
performing such operations.
We could not possibly know of and advise the service trade of all conceivable procedures or methods by which a
service might be performed, nor of any possible hazards and/or results of each procedure or method. We have
not undertaken any such wide evaluation. Therefore, anyone who uses a procedure or method not described by
the manufacturer must first satisfy himself that neither his safety, nor the safety of the product, will be
endangered by the service or operating procedure selected.
All information, illustrations, and specifications contained in this guide are based on the latest production
information available at the time of publication. However, Briggs & Stratton Corporation reserves the right to
change, alter, or otherwise improve the product at any time without prior notice.
Some components or assemblies of the product described in this guide may not be considered repairable.
Disassembly, repair and reassembly of such components may not be included in this guide.
Service and repair instructions for the engines used to power these products are not covered in this guide.
Engine service and repair instructions are furnished by the engine manufacturer.
Copyright © 2003 Briggs & Stratton Corporation
All rights reserved.
No part of this material may be reproduced or transmitted, in any form or by any means, electronic or
mechanical, including photocopying, recording or by any information storage and retrieval system, without prior
permission in writing from Briggs & Stratton Corporation.

1
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
TABLE OF CONTENTS
Tabe of Contents
1
2
3
4
5
INTRODUCTION
1
DISASSEMBLY
2
ASSEMBLY
4
APPENDIX
5
TROUBLESHOOTING
3
In The Interest of Safety 4
Safety Alert Symbols 4
Safety Practices 5
Generator Description 8
Generator Components 9
Serial Number Locations 10
Generator Specifications 10
Wiring Diagram 11
Output Power (AC) 11
Output Power (DC) 11
Fuel System Components 12
Fuel Group 12
General Service Information 12
Work Area 12
Hand Tools 12
Special Tools 12
Under-Voltage (DC) 22
Check (DC) Circuit Breaker 23
Check Bridge Diode 23
Check 12VDC Coil 23
Over-Voltage (AC) 24
Check Capacitor 24
Under-Voltage (AC) 26
Check Receptacle Wiring 27
Check (AC) Circuit Breaker 27
Check Stator Power Winding 28
Check Excitation Winding 28
Check Rotor Winding 29
Engine Switch 29
Pilot Lamp 30
Mounting The Rotor & Stator 33
Installing The Muffler Heat Shield 34
Connecting The Wiring Harness 35
Mount The Rear Case Half 36
Mount The Fuel Tank 37
Mount The Front Case Half 37
Resistance Values 43
Torque Specifications 43
Fasteners and Locations 44
General Disassembly Considerations 15
Case Separation 15
Access To Generator Components 17
Rotor / Stator Removal 18

Hand-Held Series Generators • Familiarization & Troubleshooting Guide
2
Table of Contents
1
2
3
4
5

3
Section 1 • Introduction
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
INTRODUCTION 1

INTRODUCTION
4
Introduction • Section 1
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
1In the Interest of Safety
This manual outlines the construction,
function and servicing procedures of
the Briggs & Stratton Power Products®
“Hand-Held” generator series. It is
structured for use by trained
technicians that are working in a
properly equipped shop. Familiarity
with the proper method of using tools,
measuring equipment and workshop
procedures are essential to performing
successful maintenance and repair on
this equipment.
Ensure that all specified tools and/or
equipment are available before
attempting to service this equipment.
For a detailed discussion of the
fundamental principles involved with
the physics of electrical power
generation, refer to the "Familiarization
and Troubleshooting Guide
(Publication #86262 Revision 3 or
later)". This manual is available
through your Briggs & Stratton Central
Distributor.
Safety Alert Symbols
NOTE: This notation is used to
inform you of a method, reference
or procedure that could assist with
specific operations or decisions.
HAZARD SYMBOLS AND MEANINGS
Toxic Fumes Electrocution
Hot Surface Chemical Burns
Explosive Pressure
Kick Back Entanglement
Disconnect
Spark Plug
Fire
Read Goggles
Explosion
• Operate generator ONLY outdoors.
• Keep at least 2 feet of clearance on all
sides of generator for adequate
ventilation.
• Do not operate generator inside any
building or enclosure, including the
generator compartment of a
recreational vehicle (RV).
Running generator gives off
carbon monoxide, an
odorless, colorless, poison
gas.
Breathing carbon monoxide
will cause nausea, fainting or
death.
The safety alert symbol ( ) is used
to identify safety information about
hazards that can result in personal
injury. A signal word (DANGER,
WARNING, CAUTION) is used
with the alert symbol to indicate the
potential severity of injury. In addition,
a hazard symbol may be used to
represent the type of hazard.
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 might
result in death or serious
injury.
CAUTION: When used without the
alert symbol, indicates a situation that
could result in damage to equipment.
DANGER
• When using generator for backup
power, notify utility company. Use
approved transfer equipment to isolate
generator from electric utility.
• Use a ground circuit fault interrupter
(GFCI) in any damp or highly
conductive area, such as metal decking
or steel work.
• Do not touch bare wires or
receptacles.
• Do not use generator with electrical
cords which are worn, frayed, bare or
otherwise damaged.
• Do not operate generator in the rain.
• Do not handle generator or electrical
cords while standing in water, while
barefoot, or while hands or feet are
wet.
• Do not allow unqualified persons or
children to operate or service
generator.
Generator produces
powerful voltage.
Failure to isolate generator
from power utility can result
in death or injury to electric
utility workers due to
backfeed of electrical energy.
DANGER
• National electric code requires
generator to be properly grounded to
an approved earth ground. Call an
electrician for local grounding
requirements.
Failure to properly ground
generator can result in
electrocution, especially if the
generator is equipped with a
wheel kit.
DANGER

5
Introduction • Section 1
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Safety Practices
• Generator exhaust gases contain
DEADLY carbon monoxide gas.
This dangerous gas, if breathed
in sufficient concentrations, can
cause unconsciousness or even
death. Operate and service this
equipment only in the open air
where adequate ventilation is
available.
• These generators were designed
and manufactured for
recreational applications. Do not
attempt to modify the unit or
use it for any application it was
not designed for. If you have any
questions about your generator's
application, ask your dealer or
consult the factory.
• The manufacturer could not
possibly anticipate every
circumstance that might involve a
hazard. For that reason, warnings
in manuals and warnings on tags
or decals affixed to the units are
not all-inclusive. If you intend to
handle, operate or service a unit
with a procedure or method not
specifically recommended by the
manufacturer, make sure that
such a procedure or method will
not render the equipment unsafe
or pose a threat to you and
others.
• Read these procedures carefully
and become familiar with your
generator set. Know its
applications, its limitations and
any hazards involved.
• Do not allow any open flame, spark,
heat, or lit cigarette around battery
during, and for several minutes after
charging.
• Wear protective goggles, rubber
apron, and rubber gloves.
Storage batteries give off
explosive hydrogen gas
during recharging.
Hydrogen gas stays around
battery for a long time after
battery has been charged.
Slightest spark will ignite
hydrogen and cause
explosion.
You can be blinded or
severely injured.
Battery electrolyte fluid
contains acid and is
extremely caustic.
Contact with battery fluid
will cause severe chemical
burns.
DANGER
• Do not touch hot surfaces.
• Allow equipment to cool before
touching.
Running engines produce
heat. Temperature of muffler
and nearby areas can reach
or exceed 150°F (65°C).
Severe burns can occur on
contact.
DANGER
• This generator does not meet U.S.
Coast Guard Regulation 33CFR-183 and
should not be used on marine
applications.
• Failure to use the appropriate U.S.
Coast Guard approved generator could
result in bodily injury and/or property
damage.
WARNING
WHEN ADDING FUEL
• Turn generator OFF and let it cool at
least 2 minutes before removing gas
cap. Loosen cap slowly to relieve
pressure in tank.
• Fill fuel tank outdoors.
• Do not overfill tank. Allow space for
fuel expansion.
• Keep all fuel away from sparks, open
flames, pilot lights, heat, and other
ignition sources.
• Do not light a cigarette or smoke.
WHEN OPERATING EQUIPMENT
• Do not tip engine or equipment at
angle which causes fuel to spill.
WHEN TRANSPORTING OR
REPAIRING EQUIPMENT
• Transport/repair with fuel tank EMPTY
or with fuel shutoff valve OFF.
• Disconnect spark plug wire.
• Do Not operate generator in a moving
vehicle or watercraft, because motion
can cause fuel to spill.
WHEN STORING FUEL OR
EQUIPMENT WITH FUEL IN
TANK
• Store away from furnaces, stoves,
water heaters, clothes dryer or other
appliances that have pilot light or other
ignition source because they can ignite
fuel vapors.
Fuel and its vapors are
extremely flammable and
explosive.
Fire or explosion can cause
severe burns or death.
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

6
• Hand-held generators produce a very powerful
voltage that can cause an extremely dangerous
electrical shock. Avoid contact with bare wires,
terminals, etc. Never permit an untrained person to
service or assist with the procedures discussed in this
guide.
• Never handle any kind of electrical cord or device
while standing in water, while barefoot, or while
hands or feet are wet.
• Do not use worn, bare, frayed or otherwise damaged
electrical cord sets with any generator set. Using a
defective cord may result in an electrical shock or
damage to the test equipment and/or the unit.
• Gasoline is highly flammable and its vapors are
EXPLOSIVE. Do not permit smoking, open flames,
sparks or heat in the vicinity while handling gasoline.
Avoid spilling gasoline on a hot engine. Comply with
all laws regulating storage and handling of gasoline.
• Do not overfill the fuel tank. Always allow room for fuel
expansion. If the tanks are over-filled, fuel can overflow on
`to a hot engine and cause FIRE or EXPLOSION.
• These units require an adequate flow of cooling air for their
continued proper operation. Never operate or service any
unit while inside any enclosure where the free flow of
cooling air into and out of the unit might be obstructed.
Without sufficient cooling airflow, the units quickly
overheat, damaging the generator and/or nearby property.
• Never start or stop a unit with electrical loads connected
to receptacles and with the connected loads turned ON.
Start the engine and let it stabilize before connecting any
electrical loads. Turn OFF and disconnect all electrical
loads before shutting down any generator.
• This entire book is filled with important safety information
- please read it carefully.
Introduction • Section 1
Hand-Held Series Generators • Familiarization & Troubleshooting Guide

7
Section 1 • Introduction
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
1

8
Item Nomenclature
1. Vibration Mount
2. Bearing Carrier
3. Cooling Fan
4. Rotor Bearing
5. Rotor Bolt (M6-160)
6. Rotor Assembly
7. Stator Bolt (M6-90)
8. Stator Assembly
9. Fuel Tank
10. Fuel Cap
Item Nomenclature
11. Fuel Inlet Filter
12. Spark Plug
13. Generator Case Half
14. Fuel Filter
15. Fuel Hose
16. Fuel Valve
17. Air Cleaner
18. Carburetor
19. Engine
20. Engine Base
GENERATOR DESCRIPTION
Introduction • Section 1
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Figure 1 — Internal Components
1
7
12 13
14
15
16
17
18
19
20
11
10
9
8
6
5
4
3
2
1

9
GENERATOR COMPONENTS
Section 1 • Introduction
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Figure 2 — External Components
Control Panel
Oil Service Cover
Grounding Lug
Muffler
Spark Plug Access
Recoil Starter
Recoil Starter
Engine Switch
Air Cleaner
Data Plate
Cooling Fan
Choke Lever
Fuel Shut-Off
Fuel Cap 1

10
Serial Number Locations Generator Specifications
Engine:
Name: GM82 or Vanguard
Type: Air Cooled, Four
Cycle Gasoline
Engine
Displacement: 80 cubic centimeters
Max. Power: 1.8KW @ 4000RPM
Rated (AC) Power: 1.3KW @ 3000RPM
Oil Capacity: 0.4 Liter
Starting System: Recoil Starter
Oil Alert System: Yes
Generator: N. American Europe
(AC) Frequency: 60Hz
Phase: Single Single
(AC) Rated Voltage: 120 VAC 230VAC
(AC) Rated Current:: 7.5 Amps 3.2 Amps
(AC) Rated Output: 900 VA 750 VA
(AC) Maximum Output: 1000 VA 900 VA
(DC) Output: 12 VDC 12VDC
@ 8.3 Amps @ 8.3 Amps
Voltage Regulator: Condenser Condenser
Rated Power Factor: 1.0 1.0
Rated: Continuous Continuous
Other:
Fuel Capacity: 4.5 Liter / 1.18 Gal 4.5 Liter / 1.18 Gal.
Continuous Operation: 6.4 Hours 6.4 Hours
Noise Level: 63 DBA 63 DBA
@ 7 Meters @ 7 Meters
Dimensions: Length: 465mm 465mm
Width: 343mm 343mm
Height: 371mm 371mm
Dry Weight: 55 lbs. / 25 Kg 55lbs. / 25 Kg
Introduction • Section 1
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Figure 3 — Engine Serial Number Location
Figure 4 — Generator Serial Number Location
1

11
Output Power (AC)
The residual magnetism of the rotor induces an (AC)
voltage in the power and excitation windings when the rotor
is turned by hand (when recoil starter is pulled). The (AC)
voltage of the excitation winding builds in the condenser
until it discharges. This "capacitive discharge" then
strengthens the magnetic field in the excitation winding. As
the rotor windings "cut" this strengthened magnetic field, a
higher (AC) voltage is induced in the rotor winding. The
diode in the rotor rectifies the induced rotor (AC) to (DC).
The intensified magnetic field of the rotor "cuts" across both
the power and excitation windings. When the engine starts
and spins the rotor, residual magnetism is overcome and this
cycle continues to increase the (AC) output voltage of the
power and excitation windings until magnetic saturation and
condenser capacity is balanced. This is the calculated "Rated
Output" of the generator.
When an external load is plugged into an output receptacle,
the increased current flow intensifies the magnetic field of
the power winding. As the magnetic field of the rotor "cuts"
across the intensified field of the power winding, an
additional voltage is induced into the rotor field winding.
This increases the output of the power winding to
compensate for the voltage drop of the load.
Output Power (DC)
(AC) voltages that are induced into the 12VAC winding are
rectified to (DC) by a "full-wave" bridge rectifier.
GENERATOR SYSTEMS
Section 1 • Introduction
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Figure 5 — Generator Wiring Diagram 1

12
Fuel System Components
Fuel Group:
The components that make up the Fuel group include the
items listed in Figure 6.
The items listed in Figure 7 are part of the fuel cap and are
not replaceable. If damage occurs to the fuel cap, its repair is
limited to replacement.
GENERAL SERVICE INFORMATION
Work Area
Good lighting and an elevated table will help you gain access
to all of the mounting hardware and accessories of the hand-
held generator. Certainly, larger is better but a good
minimum sized table would be 20in. by 30in. If casters are
applied to the legs of the table, be sure they are secure and
sturdy enough to support not only the generator but also
the work being performed.
Hand Tools
A minimum collection of standard mechanic's hand tools
should include:
· 3/8" drive socket set (SAE)
· 3/8" drive socket set (Metric)
· A 3/8" drive ratchet
· Short, medium and long 3/8" drive extensions
· A large (heavy) "soft" mallet
· A common screwdriver (medium length)
· A Phillips screwdriver (medium length)
· A Phillips screwdriver (short- "stubby")
· A large (heavy duty) screwdriver suitable for mild prying
Special Tools
Electronic Measuring Equipment:
The measuring equipment used in troubleshooting should be
of industrial quality and have the sensitivity to measure
electronic values to the third decimal. Its accuracy should be
within acceptable tolerances should have the ability to
measure capacitance.
Introduction • Section 1
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Figure 6 — Fuel Systems Components
Shut-Off Valve
Fuel Hose
Fuel Cap Assembly
Fuel Strainer
Spill Well
Tank
Mounting Brackets
Tank Sump Filter
Figure 7 — Fuel Cap Assembly
1

13
Section 2 • Disassembly
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
DISASSEMBLY 2

14
Disassembly • Section 2
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
2

15
General Disassembly Considerations
Always inspect the external condition of the plastic
components before disassembling the unit. Look for cracks
and broken plastic and be sure to note these conditions as
existing before maintenance is undertaken.
Hand-held generators are built to close tolerances. The
fasteners used to hold the plastic shrouds and covers are
special machine screws that have a "pilot" collar
incorporated into the grip area of the screw (Figure 8).
NOTE: When assembling plastic components, be
sure the "collar" of the screw fits into the opening of
the shroud or cover. Pinching the plastic under the
collar will break the plastic at the mounting locations.
The length of these fasteners is critical to the proper
assembly of the unit. When disassembling the generator, it is
recommended that the location and length of each fastener
be noted.
When troubleshooting becomes necessary, access to various
components, systems and structural members is required.
Regardless of the ultimate reason, a clear understanding of
the unit's disassembly will save time and effort.
NOTE: Do not attempt to remove the protective
grill that surrounds the exhaust muffler. The fasteners
that hold it in place are secured with plain nuts and
lock-washers. If you attempt to remove the grill, it
will be necessary to disassemble the case halves in
order to reinstall it properly.
Case Separation
• Remove the cover to the air cleaner.
• Set the air filter and support grill aside.
• Remove the two mounting nuts that hold the air filter
assembly to the carburetor (Figure 48, Pg. 34).
• Remove the two screws that hold the handle of the
unit together (Figure 9).
At this point, position the unit so you are facing the muffler
side of the generator.
• Remove only those fasteners that hold the rear case
half. That is:
• Those screws around the lower base of the rear
of the generator.
• The upper screws that secure the rear case-half
on the right and left side of the generator.
• Grasp the rear case half and gently separate it from the
generator unit.
Section 2 • Disassembly
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Figure 8 — Screws with ”Pilot Collar”
Pilot Collars
Figure 9 — Remove Screws In Handle
2

16
• Remove the screw that is next to the fuel shut-off valve
and retain the mounting bracket that supports the fuel
tank (Figure 10).
• Slide the fuel tank out of its cradle and remove the fuel
supply hose from the bottom of the tank (Figure 11).
Disassembly • Section 2
Hand-Held Series Generators • Familiarization & Troubleshooting Guide
Figure 10 — Mounting Bracket Screw
Figure 11 — Remove Fuel Supply Hose
Hose to Tank
2