Briggs & Stratton THE POWER WITHIN 600 SERIES User manual

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BRIGGSandSTRATTON.com
Form No. 277203TRI-3/07
Printed in U.S.A.
Model 120000 600 Series

2BRIGGSandSTRATTON.com
Thank you for purchasing this quality-built Briggs & Stratton engine. 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 Briggs & Stratton product will provide many years of dependable service.
This manual contains safety information to make you aware of the hazards and risks
associated with engines and how to avoid them. It also contains instructions for the proper use and care of the
engine. Because Briggs & Stratton Corporation does not necessarily know what equipment this engine will power,
it is important that you read and understand these instructions and the instructions for the equipment this engine
powers.
Where to Find Us
You never have to look far to find Briggs & Stratton support and service for your engine. Consult your Yellow
PagesEunder “Engines-Gasoline”, “Gasoline-Engines”, “Lawn Mowers” or similar categories. There are over
30,000 Briggs & Stratton authorized service dealers worldwide who provide quality service. You can also contact
Briggs & Stratton Customer Service by phone at [phone]. Additional information can be found on the
Internet at BRIGGSandSTRATTON.com.
For replacement parts or technical assistance, record below the engine model, type, and code numbers along with
the date of purchase. These numbers are located on your engine (see the “Features” page).
Date of purchase:
Engine model:
MM/DD/YYYY
Model: Code:Type:
Table of Contents
Safety 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Features and Controls 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operation 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Warranties 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Briggs & Stratton is a trademark of
Briggs & Stratton Corporation
Milwaukee, WI, USA.
Copyright E2007 Briggs & Stratton Corporation,
Milwaukee, WI, USA. All rights reserved.
Printed in U.S.A.

Operator Safety
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en
General Information
This is a single cylinder, air-cooled engine. It is a low
emissions engine.
In the state of California, Model 120000 engines are certified
by the California Air Resources Board to meet emissions
standards for 125 hours. Such certification does not grant
the purchaser, owner or operator of this engine any
additional warranties with respect to the performance or
operational life of this engine. This engine is warranted
solely according to the product and emissions warranties
stated elsewhere in this manual.
Symbols And Warnings
The safety alert symbol is used to identify safety
information about hazards that can result in personal injury. A
signal word (DANGER, WARNING, or CAUTION) is used with
the alert symbol to indicate the likelihood and 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 minor or moderate injury.
CAUTION,when used without the alert symbol,
indicates a situation that could result in damage to
the product.
The engine exhaust from this product contains chemicals
known to the State of California to cause cancer, birth
defects, or other reproductive harm.
WARNING
Briggs & Stratton does not approve or authorize the use
of these engines on 3-wheel All Terrain Vehicles (ATVs),
motor bikes, fun/recreational go-karts, aircraft products
or vehicles intended for use in competitive events. Use
of these engines in such applications could result in
property damage, serious injury (including paralysis), or
even death.
WARNING
This engine is shipped from Briggs & Stratton without oil.
If you start the engine without oil, the engine will be
damaged beyond repair and will not be covered under
warranty.
CAUTION
Explosion
Toxic Fumes
Moving Parts
Shock
Hot Surface
Kickback
Fire
Fuel
Shutoff
Read Manual Choke
Oil
Fuel
On Off
Stop
Wear Eye
Protection
Slow
Fast
SYMBOLS ASSOCIATED
WITH THIS PRODUCT

Operator Safety
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Gasoline and its vapors are extremely
flammable and explosive.
Fire or explosion can cause severe burns
or death.
When Adding Fuel
•Turn engine off and let engine cool at least 2
minutes before removing the gas cap.
•Fill fuel tank outdoors or in well-ventilated area.
•Do not overfill fuel tank. Fill tank to approximately
1-1/2 inches below top of neck to allow for fuel
expansion.
•Keep gasoline away from sparks, open flames,
pilot lights, heat, and other ignition sources.
•Check fuel lines, tank, cap, and fittings frequently
for cracks or leaks. Replace if necessary.
•If fuel spills, wait until it evaporates before starting
engine.
When Starting Engine
•Ensure that spark plug, muffler, fuel cap and air
cleaner are in place and secured.
•Do not crank engine with spark plug removed.
•If engine floods, set choke (if equipped) to
OPEN/RUN position, place throttle in FAST and
crank until engine starts.
When Operating Equipment
•Do not tip engine or equipment at angle which
causes gasoline to spill.
•Do not choke carburetor to stop engine.
When Transporting Equipment
•Transport with fuel tank EMPTY or with fuel shut-off
valve OFF.
When Storing Gasoline Or Equipment With Fuel In
Tank
•Store away from furnaces, stoves, water heaters or
other appliances that have pilot light or other
ignition source because they can ignite gasoline
vapors.
WARNING
Starting engine creates sparking.
Sparking can ignite nearby flammable
gases.
Explosion and fire could result.
•If there is natural or LP gas leakage in area, do not
start engine.
•Do not use pressurized starting fluids because
vapors are flammable.
WARNING
Engines give off carbon monoxide, an
odorless, colorless, poison gas.
Breathing carbon monoxide can cause
nausea, fainting or death.
•Start and run engine outdoors.
•Do not start or run engine in enclosed area, even if
doors or windows are open.
WARNING
Rapid retraction of starter cord (kickback) will
pull hand and arm toward engine faster than
you can let go.
Broken bones, fractures, bruises or sprains
could result.
•When starting engine, pull the starter cord slowly
until resistance is felt, then pull rapidly.
•Remove all external equipment/engine loads before
starting engine.
•Direct-coupled equipment components such as, but
not limited to, blades, impellers, pulleys, sprockets,
etc., must be securely attached.
WARNING
Rotating parts can contact or entangle
hands, feet, hair, clothing, or accessories.
Traumatic amputation or severe laceration
can result.
•Operate equipment with guards in place.
•Keep hands and feet away from rotating parts.
•Tie up long hair and remove jewelry.
•Do not wear loose-fitting clothing, dangling
drawstrings or items that could become caught.
WARNING

Operator Safety
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en
Running engines produce heat. Engine
parts, especially muffler, become
extremely hot.
Severe thermal burns can occur on
contact.
Combustible debris, such as leaves,
grass, brush, etc. can catch fire.
•Allow muffler, engine cylinder and fins to cool before
touching.
•Remove accumulated debris from muffler area and
cylinder area.
•Install and maintain in working order a spark arrester
before using equipment on forest-covered,
grass-covered, brush-covered unimproved land. The
state of California requires this (Section 4442 of the
California Public Resources Code). Other states
may have similar laws. Federal laws apply on
federal land.
WARNING
Before performing adjustments or repairs:
•Disconnect the spark plug wire and keep it away
from the spark plug.
•Disconnect battery at negative terminal (only
engines with electric start.)
•Use only correct tools.
•Do not tamper with governor spring, links or
other parts to increase engine speed.
•Do not strike the flywheel with a hammer or hard
object because the flywheel may later shatter
during operation.
When testing for spark:
•Use approved spark plug tester.
•Do not check for spark with spark plug removed.
Unintentional sparking can result in fire
or electric shock.
Unintentional start-up can result in
entanglement, traumatic amputation, or
laceration.
WARNING

Features and Controls
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A. Spark Plug
B. Primer
C. Fuel Tank and Cap
D. Air Cleaner
E. Rewind Handle
F. Dipstick
G. Oil Drain Plug
H. Engine Identification
Model Type Code
I. Muffler
Muffler Guard (if equipped)
Spark Arrester (if equipped)
A
D
C
I
H
I
F
E
B
H
G

Operation
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Oil Capacity
Oil capacity (see the Specification page)
Oil Recommendations
•Do not use special additives.
•Choose a viscosity from the following chart.
SAE 30 40F and higher (5C and higher)
is good for all purpose use above 40°F, use below 40°F
will cause hard starting.
10W-30 0 to 100F (−18 to 38C)
is better for varying temperature conditions. This grade of
oil improves cold weather starting, but may increase oil
consumption at 80°F (27°C) or higher.
*Check oil level frequently at higher temperatures.
Synthetic 5W-30 −20 to 120F (−30 to 40C)
provides the best protection at all temperatures as well as
improved starting with less oil consumption.
5W-30 40F and below (5C and below)
is recommended for winter use, and works best in cold
conditions.
Check/Add Oil
Before adding or checking the oil
•Place engine level.
•Clean the oil fill area of any debris.
1. Remove the dipstick (B) and wipe with a clean cloth
(Figure 1).
2. Insert and tighten the dipstick.
3. Remove the dipstick and check the oil level. Make sure
the oil is at the FULL mark (C) on the dipstick.
4. To add oil, pour the oil slowly into the engine oil fill (D).
DO NOT OVERFILL. After adding oil, wait one minute
and then recheck the oil level.
5. Fill to the FULL mark (C) on the dipstick.
6. Replace and tighten the dipstick.
Figure 1: Extended Dipstick
C
B
B
D
Fuel Recommendations
Fuel must meet these requirements:
•Clean, fresh, unleaded gasoline.
•A minimum of 87 octane/87 AKI (91 RON). High altitude
use, see below.
•Gasoline with up to 10% ethanol (gasohol) or up to
15% MTBE (methyl tertiary butyl ether),is acceptable.
Do not use unapproved gasolines, such as E85. Do not
mix oil in gasoline or modify the engine to run on
alternate fuels. This will damage the engine components
and void the engine warranty.
CAUTION
To protect the fuel system from gum formation, mix a fuel
stabilizer into the fuel. See Storage. All fuel is not the same.
If starting or performance problems occur, change fuel
providers or change brands. This engine is certified to
operate on gasoline. The emissions control system for this
engine is EM (Engine Modifications).
High Altitude
At altitudes over 5,000 feet (1524 meters), a minimum 85
octane/85 AKI (89 RON) gasoline is acceptable. To remain
emissions compliant, high altitude adjustment is required.
Operation without this adjustment will cause decreased
performance, increased fuel consumption, and increased
emissions. See an Authorized Briggs & Stratton Dealer for
high altitude adjustment information.
Operation of the engine at altitudes below 2,500 feet (762
meters), with the high altitude kit is not recommended.

Operation
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Add Fuel
Gasoline and its vapors are extremely
flammable and explosive.
Fire or explosion can cause severe burns
or death.
•Turn engine off and let engine cool at least 2 minutes
before removing the gas cap.
•Fill fuel tank outdoors or in well-ventilated area.
•If fuel spills, wait until it evaporates before starting
engine.
WARNING
1. Remove the gas cap (Figure 2). Fill the fuel tank (B) to
approximately 1-1/2 inches below top of neck to allow
for fuel expansion. Be careful, do not overfill.
2. Replace the gas cap (A) before starting the engine.
Figure 2: Gas Cap
A
B
How To Start The Engine
This engine was shipped from the factory without oil. If
you start the engine without oil, the engine will be
damaged beyond repair and will not be covered under
warranty.
CAUTION
1. Check the engine oil.
2. When starting a new engine for the first time, firmly push
the primer bulb (D) five times. Then for all future starts,
push the primer bulb three times (Figure 3).
Note: Priming is usually unnecessary when restarting a
warm engine. However, cool weather may require
priming. If you push the primer bulb too many times, the
engine may flood with fuel and will not start.
Figure 3: Primer Bulb
D
3. If the product has a handle or a control panel equipped
with an engine brake release lever, engage the brake
release lever (E) as shown in Figure 4.
Figure 4: Engine Brake Release Lever
E
4. Firmly hold the starter rope handle (G). Slowly pull the
starter rope handle until resistance is felt, then pull
quickly (Figure 5).
Rapid retraction of starter cord (kickback) will
pull hand and arm toward engine faster than
you can let go.
Broken bones, fractures, bruises or sprains
could result.
•When starting the engine, pull the starter rope handle
slowly until resistance is felt, then pull rapidly.
WARNING
Figure 5: Starter Rope Handle
G
5. If the engine does not start after three pulls, push the
primer bulb three times and again pull the starter rope
handle. See the Troubleshooting page.
How To Stop The Engine
Release the brake release lever (F) as shown in Figure 6.
Figure 6: Engine Brake Release Lever
F

Maintenance
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Regular maintenance will improve the performance and
extend the life of the equipment. See any Authorized Briggs
& Stratton service dealer for service. Use only original
equipment replacement parts. Other parts may not
perform as well, may damage the unit, and may result in
injury. In addition, use of other parts may void your
warranty.
All the components used to build this engine must
remain in place for proper operation.
CAUTION
Emissions Control
Maintenance, replacement, or repair of the emissions
control devices and systems may be performed by any
non-road engine repair establishment or individual.
However, to obtain no charge repairs under the terms and
provisions of the Briggs & Stratton warranty statement, any
service or emissions control part repair or replacement must
be performed by a factory authorized dealer. See the
Emissions Warranty.
Before performing adjustments or repairs:
•Disconnect the spark plug wire and keep it away
from the spark plug.
•Use only correct tools.
•Do not tamper with governor spring, links or
other parts to increase engine speed.
•Do not strike the flywheel with a hammer or hard
object because the flywheel may later shatter
during operation.
When testing for spark:
•Use approved spark plug tester.
•Do not check for spark with spark plug removed.
Unintentional sparking can result in fire
or electric shock.
Unintentional start-up can result in
entanglement, traumatic amputation, or
laceration.
WARNING
Maintenance Chart
Follow the hourly or calendar intervals, which ever occur
first.
First 5 Hours
•Change Oil
Every 5 Hours or Daily
•Check oil level
•Clean area around muffler
Every 25 Hours or Every Season
•Change oil if operating under heavy load or in high
temperature
•Service air cleaner *
Every 50 Hours or Every Season
•Change oil
•Clean cooling system †
*In dusty conditions or when airborne debris is present,
clean more often. Replace air filter if it is very dirty.
†In dusty conditions, clean more often. Check every 25
hours.
Carburetor Adjustment
Never make adjustments to the carburetor. The carburetor
was set at the factory to operate efficiently under most
conditions. However, if adjustments are required, see any
Authorized Briggs & Stratton service dealer for service.
The manufacturer of the equipment on which this engine
is installed specifies top speed at which the engine will
be operated. DO NOT EXCEED this speed.
CAUTION
Spark Plug
Check the spark plug every 100 hours (Figure 7). Replace
the spark plug if, upon inspection, the electrode (A) is
burned or worn. Make sure that the spark plug is clean.
Check the gap (C) with a wire gauge (B). If necessary, reset
to 0.030 in (0.76 mm).
Note: In some areas, local law requires using a resistor
spark plug to suppress ignition signals. If this engine was
originally equipped with a resistor spark plug, use same
type for replacement.
Figure 7: Check Spark Plug
AB
C

Maintenance
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Inspect Muffler And Spark Arrester
Inspect the muffler and the spark arrester (if equipped)
every 50 hours. If muffler is equipped with a spark arrester
screen, remove the screen for inspection. Replace the
screen if damaged or plugged. If inspection determines that
replacement parts are required, make sure to use only
original equipment replacement parts.
Fire could result.
•Replacement parts must be the same and installed in
the same position as the original parts.
WARNING
How To Change The Oil
Remove Oil
1. With engine off but still warm, disconnect the spark plug
wire (A) and keep it away from the spark plug (Figure 8).
Figure 8: Spark Plug
A
2. If you drain the oil from the top of the engine through the
engine oil fill (B), make sure to keep the spark plug side
(C) up (Figure 9). Drain the oil into an appropriate
receptacle.
Figure 9: Drain Oil
B
C
3. If you drain the oil from the bottom of the engine, remove
the oil drain plug (D) as shown in Figure 10. Drain the oil
into an appropriate receptacle.
Note: Some of the various types of oil drain plugs (D)
are shown in Figure 10.
D
Figure 10: Oil Drain Plugs
4. Replace and tighten the oil drain plug.
Before adding oil
•Place engine level.
•Clean the oil fill area of any debris.
Extended Dipstick
1. Remove the dipstick (B) and wipe with a clean cloth
(Figure 11).
2. Pour the oil slowly into the engine oil fill (D). DO NOT
OVERFILL. After adding oil, wait one minute and then
recheck the oil level.
3. Insert and tighten the dipstick.
4. Remove the dipstick and check the oil level. Make sure
the oil is at the FULL mark (C) on the dipstick.
5. Replace and tighten the dipstick.
B
D
Figure 11: Extended Dipstick
C
B