Briggs & Stratton 21000 Series Installation and operation manual

FORM NO. 276183-8/05
PRINTED tN U.S.A.
© Copyright 2005 by Briggs & Stratton Corporation
Operating ntenance
Instructions
The Power That Works For You®
Model Series 21000, 21100 covered in this manual
www.briggsandstratton.com

Safety References
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 engine.
[_ This manual contains safety
information to make you aware of
the hazards and risks associated with engines, and
how to avoid them. Because Briggs & Stratton 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.
SYMBOLS ASSOCIATED
WITH THIS ENGINE:
[[_ ReadFire Manual
,_ Explosion _ Oil
_ Kickback _ Fuel
,,_,/tlI_,l_,,____,Hot Surface Fuel Shutoff
Toxic Fumes
Moving Parts
_$ Shock
'_ Primer
On Off
I",1 Choke
[_ Stop
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.
Table of Contents
Safety References ............................... 2
Features ....................................... 3
Safety .......................................... 4
Starting ........................................ 5
Stopping ........................................ 6
Troubleshooting ................................. 7
Oil ............................................. 8
Fuel .......................................... 10
Specifications and Emission Information ............ 11
Maintenance ................................ 12-14
Storage ....................................... 15
Service ........................................ 16
Warranty Information ............................ 17
, ,WARNING
The engine exhaust from this product contains
chemicals known to the State of California to cause
cancer, birth defects, or other reproductive harm.
CAUTION
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.

Features
1. Carburetor
2. Stop Switch location, if equipped/stop wires
3. Rope Handle
4. Fuel Fill
5. Air Cleaner
6. Choke
7. Spark Plug
8, Primer Bulb
9. Engine Identification
Model XXXXX Type XXXXXX Code
XXXXXXXX
10. Oil Fill/Dipstick
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Safety
CAUTION
This engine is shipped from Briggs & Stratton
without oil. If you start the engine without oi!, the
engine wit! be damaged beyond repair and will
not be covered under warranty.
WARNING
WHEN ADDING FUEL
,,Turn engine OFF and let engine cool at least 2
minutes before removing gas cap.
,, Fill fuel tank outdoors or in well-ventilated area.
,, Do not overfill fuel tank.
,, 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.
WHEN STARTING ENGINE
,, Make sure spark plug, muffler, fuel cap and air
cleaner are in place.
Do not crank engine with spark plug removed.
If fuel spills, wait until it evaporates before
starting engine.
,, If engine floods, set choke to OPEN/RUN
position, place throttle in FAST and crank until
engine starts.
WHEN OPERATING EQUIPMENT
Do not choke carburetor to stop engine.
WHEN TRANSPORTING EQUIPMENT
Transport with fuel tank EMPTY.
WHEN STORING GASOLINE OR EQUIP=
MENT 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
,, 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
When starting engine, pull cord slowly until
resistance is felt, then pull rapidly.
o Direct coupled equipment components such as,
but not limited to, blades, impellers, pulleys,
sprockets, etc., must be securely attached.
WARNING
o Operate equipment with guards in place.
,, Keep hands and feet away from rotating parts.
o Tie up long hair and remove jewelry.
o Do not wear loose-fitting clothing, dangling
drawstrings or items that could become caught.
WARNING
o Start and run engine outdoors.
Do not start or run engine in enclosed area,
even if doors or windows are open.
,Jl_lll/l&ltl_,
WARNING
Allow muffler, engine cylinder and fins to cool
before touching.
,, Remove accumulated debris from muffler area
and cylinder area.
o 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.

Starting
This engine is shipped WITHOUT oiI. See section on oil
for recommendations, capacity, and filling details.
Full Choke
Half Choke
Off Position
CAUTION
Operating engine at an excessive speed without
proper engine loading will cause damage. DO NOT
operate a string trimmer with a line shorter than
10" diameter for extended periods.
Choke Lever
Primer Bulb
1. Set unit on flat surface and push primer bulb 15
times FOR A NEW ENGINE. Push primer bulb 8
times for all future starts.
2. Move red choke lever to the FULL CHOKE
position.
3. Not all applications have a throttle. If the
equipment has this a throttle, squeeze throttle
trigger. Ifthe engine is still warm from a previous
start, do not squeeze throttle.
Typical
Trigger
4. Pull starter handle sharply until engine runs.
5. Wait a maximum of I0 seconds, then move choke
lever to HALF CHOKE position.
6. Run the engine at HALF CHOKE for 20 seconds
or until unit accelerates smoothly. Move choke to
OFF position.
7. Wait a minimum of 20 seconds, then release
throttle trigger.
WARNING
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.

Stopping
,_WARNING
Do not stop engine by moving choke control to
CHOKE. Backfire, fire or engine damage could
occur.
1. Depress stop switch located on the engine or
equipment to stop.
Need Assistance?
Go to www.briggsandstratton.corn or call 1-800-233-3723

Troubleshooting
Engine will not start
Out of fuel
• Prime engine
• if engine is cold, ensure choke is set
correctly.
• Add fuel
Engine flooded
• Set choke to FULL CHOKE position and
continue to pull starter handle.
Fouled spark plug/engine fails to
product spark
• Remove spark plug and clean it. Check
the spacing on the electrode and set the
gap to the correct dimension. See
Maintenance Section. if plug is damaged,
replace with a new spark plug.
• Ensure the spark plug is installed and
wire is connected.
CAUTION
This engine is shippedfrom Briggs & Stratton
without oil. If you startthe engine withoutoil, the
engine will be damaged beyond repair and will
not be covered under warranty.
,_ WARNING
• Ensure fuel cap is in place before
starting engine
o Turn engine OFF and let engine
cool at least 2 minutes before
removing fuel cap.
o Check fuel lines, tank, cap, and
fittings frequently for cracks or
leaks. Replace if necessary.
• Do not crank engine with spark plug
removed.
Engine is smoking or running rough
o There maybe slight oil accumulation in the
crankcase upon starting. This is normal.
otf excessive smoke or smoke is heavy,
ensure choke is in OFF CHOKE position.
o Check for fouled spark plug.
o Check air filter for debris.
CAUTION
If engine is tipped to transport equipment, to
remove debris, to drain oil, etc., keep the spark
plug side of engine up.

Oil
Capacity
Engine holds approximately 3 ounces (90 hi).
Change oil after first 4 hours of use.
Oil Recommendation
Use a high quality detergent oil classified "For
Service SF, SG, SH, SJ" or higher, such as Briggs &
Stratton SAE 30, Part Number 100091 (3.2oz) or
Briggs & Stratton Synthetic Oil, Part Number
100074.
Do not use special additives.
Choose a viscosity according to the table below.
SAE Viscosity Grades
**__ _
! ! ! !
o_ 2_ _ 2_ 3_ 4_ 6_ 8_ I_0
STARTING TEMPERATURE RANGE ANTICPATED BEFORE NEXT OIL CHANGE
CAUTION
Air cooledengines run hotterthan automotiveengines.
The use of non-syntheticmulti-viscosityoils (5W-30,
10W-30,etc.)in temperatures above40° F(4° O) wilt
resultin higherthan normaloil consumption.When using
a multi-viscosityoil, check oil level more frequently.
CAUTION
*Synthetic oil must be used when operatingengine
under40 F (4 O) or engine damagewi occur.
CAUTION
** Use ofSAE 30 eli below 50' F (10° O)will result in hard
starting and possible enginedamage due to inadequate
ubrication.
Adding Oil CAUTION
KEEP ENGINE LEVEL
-@
Engine must be level, with oil fill facing up, to
check oil. If engine is not level, dipstick reading will
not be accurate. This will lead to possible over or
under filling causing damage to the engine.
o Check oil level before starting the engine.
= Check level daily, or after every eight (8) hours of
use.
o Keep oil level at FULL.
• DO NOT over fill. Use oil measure cup for filling.
• Add only half ounce to 1ounce of oil at a time.
1ounce __
0,5 OUnCe
I. Place engine level. Remove dipstick. Use the oil
measure cup to pour oil slowly into engine.
Do not over fill.
Oil Fill
2. Tighten dipstick down.
3. To check oil level, remove and wipe the dipstick
clean with cloth. Tighten dipstick down. Remove
and check oil level.
Dipstick
4. Verify FULL level of oil by presence of oil in hole
on dipstick, or by measure line.
Full ------_/
5. If needed, add only half ounce of oil at a time to
bring it to FULL. Re-check level.

Changing OH & Checking Level
Change oil after first 4 hours of use, then every 8 hours.
Change oil every 4 hours when operating the engine
under heavy load or in high temperatures.
WARNING
_ * Disconnect spark plugwire and keep it away
from spark plug.
1. Change oil while engine is OFF but still warm,
ensure fuel cap is tightened securely.
2. Remove dipstick and drain oil in direction shown.
3. Place engine level. Using oil measure cup pour oil
slowly adding half ounce at a time. Do not over
fill.
Note: Engine holds approximately 3 oz (90 ml).
4. To re-check oil level, remove dipstick and wipe
clean with cloth. Tighten dipstick down. Remove
and check oil level.
5. Replace dipstick tightly, and reconnect spark plug
wire before starting engine.
CAUTION
Used oi! is a hazardous waste product. Dispose
of used oil properly. Do not discard with
household waste. Check with your local
authorities, service center, or dealer for safe
disposal/recycling facilities.
Oil
Fill

Fuel
Type of Fuel to Use
Use clean, fresh, regular unleaded gasotine with a
minimum of 85 octane. Fresh fuel prevents gum
from forming in the fuel system or on essential
carburetor parts. Purchase fuel in quantity that can
be used within 30 days.
,, For engine protection use Briggs & Stratton
Gasoline Additive available from your Authorized
Briggs & Stratton Dealer.
,, Do not use gasoline which contains Methanol.
Do not mix oil with gasoline.
• This engine is certified to operate on gasoline.
Exhaust Emission Control System: EM (Engine
Modifications).
Adding Fuel
1. Turn engine OFF and let engine cool at least 2
minutes before removing gas cap.
2. Tilt engine at angle shown to properly fill fuel tank.
CAUTION
Some fuels, called oxygenated or reformulated
fuels, are fuels blended with alcohols or ethers.
Excessive amounts of these blends can
damage the fuel system or cause performance
problems. Ifany undesirable operating
symptoms occur, use gasoline with a lower
percentage of alcohol or ether.
Fuel Fill
3. Remove cap and add fuel until level is
approximately 1" below top of fuel tank neck. Be
careful not to over fill.
4. Replace cap before starting.
10