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4
Rectangular Dual Element Air Cleaner
1. Loosen screw and tilt cover down. Remove pre-cleaner (if equipped) and
cartridge assembly from cover.
2. After servicing pre-cleaner and cartridge, place pre-cleaner, if equipped
(arrows up) over cartridge pleats (pre-cleaner lip will be at bottom of pleats).
3. Install pre-cleaner and cartridge assembly in cover.
4. Insert tabs on cover into slots
Î in bottom of base.
5. Tilt cover up and tighten screw securely.
Oval Dual Element Air Cleaner
1. Remove knob and cover. Lift air cleaner off stud.
2. After cleaning, reassemble pre-cleaner on cartridge. Push air cleaner firmly
down on stud
Ï to seat in base.
3. Push cover squarely onto base. Tighten knob securely.
Oil Foam Air Cleaner
To service foam element Ì, wash in liquid detergent and water. Squeeze dry in a
clean cloth. Saturate in engine oil. Squeeze in clean, absorbent cloth to remove
ALL EXCESS oil.
1. Loosen screw and tilt cover down. Remove bracket
Í and foam element from
cover.
2. Clean bracket, cover and base.
3. Install bracket and foam element in cover.
4. Insert tabs on cover into slots in bottom of base.
5. Tilt cover up and fasten securely with screw.
SPARK PLUG MAINTENANCE
Fig. 9
Clean/replace spark plug every 100 hours or every season, whichever occurs
first. Spark plug wrench is available from any Authorized Briggs & Stratton
Service Dealer.
Note: In some areas, local law requires using a resistor spark plug to suppress
ignition signals. If this engine was originally equipped with resistor spark plug, use
same type of spark plug for replacement.
Spark plug gap Ì should be 0.76 mm (0.030 in).
DO NOT attempt to start engine with spark plug removed. Fuel can ignite
and cause a fire or explosion. If you need to check for spark, use only Briggs
& Stratton Spark Tester, to check for spark.
WARNING
KEEPING ENGINE CLEAN
Fig. 9
Periodically remove grass and chaff build-up from engine. Clean finger guard. Do
not spray engine with water to clean because water could contaminate fuel.
Clean with a brush or compressed air.
If muffler is equipped with spark arrester screen Ë, remove spark arrester screen
for cleaning and inspection every 50 hours or every season. Replace if damaged.
To assure smooth operation, keep governor linkage, springs and controls Ê free
of debris.
Clean cooling system. Chaff or debris may clog engine’s air cooling system,
especially after prolonged operation. Remove blower housing and clean as
shown Î.
STORAGE
Engines stored over 30 days need to be protected or drained of fuel to prevent
gum from forming in fuel system or on essential carburetor parts.
For engine protection, we recommend use of Briggs & Stratton Fuel Stabilizer.
Note: If stabilizer is not used or if engine is operating on gasoline containing alcohol,
e.g. gasohol, remove all fuel from tank and run engine until it stops from lack of fuel.
1. Change oil. See Oil service.
2. Remove spark plug and pour about 15 ml (1/2 oz) of engine oil into cylinder.
Replace spark plug and crank slowly to distribute oil.
3. Clean chaff and debris from cylinder and cylinder head fins, under finger guard
and behind muffler.
4. When removing the unit from storage, only use fresh gasoline. Perform
operation checks, see maintenance schedule, before starting engine.
Store in a clean, dry area. DO NOT store near a stove, furnace or water
heater which uses a pilot light or any device that can create a spark.
WARNING
SERVICE
See an Authorized Briggs & Stratton Service Dealer. Each one carries a stock of
Genuine Briggs & Stratton Parts and is equipped with special service tools.
Need Assistance? Go to the website or call, 1-800-233-3723, (U.S.A. and
Canada) to hear a menu of pre-recorded messages offering engine maintenance
information.
Partial List of Genuine Briggs & Stratton Parts
Part
Part No.
Oil (20 oz.) 100005. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil (48 oz.) 100028. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil pump kit (uses standard electric drill 5056. . . . . . . . . . . . . . . . . . . . . . . . . . . .
to remove oil from engine quickly)
Fuel stabilizer (1 oz., 30 ml single use pouch) 992030 (5041). . . . . . . . . . . . . . . . .
Fuel filter 694485. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flat air cleaner cartridge 491588 (5043). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flat air cleaner pre-cleaner 493537. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oval air cleaner cartridge (Model 11, 12) 690610. . . . . . . . . . . . . . . . . . . . . . . . . .
Oval air cleaner pre-cleaner (Model 11, 12) 273356. . . . . . . . . . . . . . . . . . . . . . . .
Oval air cleaner cartridge (Model 20, 21) 692484. . . . . . . . . . . . . . . . . . . . . . . . . .
Oval air cleaner pre-cleaner (Model 20, 21) 273930. . . . . . . . . . . . . . . . . . . . . . . .
Resistor spark plug 802592E. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Standard spark plug 492167E. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Long life platinum spark plug 5066. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
(used on most OHV engines)
Spark tester 19368. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug wrench 19374. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Use our web site at www.briggsandstratton.com to find a dealer nearest you,
or check the Yellow Pages™".
™
Walking fingers logo and Yellow Pages" are registered
trademarks in various jurisdictions.
TUNE-UP SPECIFICATIONS
Model 120000
Bore 2-11/16 in. (68 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 2-13/64 in. (56 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . 12.48 cu. in. (206 cc). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 150000
Bore 75 mm (2.970 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 56 mm (2.200 in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement 249 cc (15.22 cu. in.). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 200000
Bore 3.120 in. (79.23 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 2.438 in. (61.67 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement 18.64 cu. in. (305 cc). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model 210000
Bore 3.300 in. (83.81 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stroke 2.438 in. (61.67 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Displacement . . . . . . . . . . . . . 20.85 cu. in. (342 cc). . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug gap 0.030 in. (0.76 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Models 120000 / 150000
Armature air gap 0.010 − 0.014 in. (0.25 − 0.36 mm). . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug gap 0.030 in. (0.76 mm). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Intake 0.004 − 0.006 in. (0.10 − 0.15 mm)**. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust 0.009 − 0.011 in. (0.23 − 0.28 mm)**. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Models 200000 / 210000
Armature air gap 0.008 − 0.012 in. (0.20 − 0.30 mm). . . . . . . . . . . . . . . . . . . . . . . . . . .
Intake 0.004 − 0.006 in. (0.10 − 0.15 mm)**. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Exhaust 0.004 − 0.006 in. (0.10 − 0.15 mm)**. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
** Valve clearance with valve springs installed and piston 1/4 in. (6 mm) past top dead
center (check when engine is cold). See Repair Manual P/N 272147.