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FUEL SYSTEM
WARNING
Replacement parts for fuel system (tank, hoses, valves, etc.)
must be the same quality as original parts, otherwise fire can
occur.
Replacing Fuel Filter
• Remove the engine cover. Replace fuel filter. Check filter for
water or debris. If found, clean fuel system. Reinstall the
engine cover.
SPARK PLUG
Fig. 9
WARNING
DO NOT check for spark with spark plug removed. Use only
Briggs & Stratton Spark Tester Ë, to check for spark.
• The electrodes on the spark plug must be clean and sharp to
produce the powerful spark required for ignition. If the spark
plug is worn or dirty the engine will be hard to start.
Ì
• Ensure spark plug gap
is 0.51 mm or 0.020 in.
VALVE CLEARANCE
Under certain running conditions, engines may require period
ic valve clearance adjustment. Consult the repair manual, Part
No. 275110, or see your Authorized Briggs & Stratton Service
Dealer for adjustment procedure.
CLEANING DEBRIS
Fig. 10
Engine and parts should be kept clean to maintain freedom of
movement, and to reduce the risk of overheating from
accumulated debris.
To assure smooth operation, keep governor linkage, springs
Í
and controls
free of debris.
Note: On string trimmer applications, clean accumu
lated debris at each refueling, sooner if needed
Accumulation of debris around muffler
Inspect and clean before every use.
If muffler is equipped with spark arrester screen
spark arrester screen for cleaning and inspection. Replace if
damaged.
Periodically remove grass and chaff build up from engine.
Ð
Clean finger guard
.
CAUTION:
DO NOT use water to clean engine parts. Water could
contaminate fuel system. Use a brush or dry cloth.
ADJUSTMENTS
Fig. 11
THROTTLE CONTROL ADJUSTMENT
Loosen casing clamp screw
Ì
in direction of arrow as far as possible. Move throttle control
to FAST position. Tighten casing clamp screw.
FIXED ADJUSTABLE CONTROL
This governor control lever
manufacturer's requirements. If adjustment is required, con
sult an Authorized Briggs & Stratton Service Dealer.
CHECK STOP SWITCH
Move throttle control to STOP position, if so equipped.
Governor control lever
Ï
switch
.
Check operation of controls. Readjust if necessary.
CARBURETOR ADJUSTMENT
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.
A primer equipped carburetor is not adjustable and the engine
will idle down only 600 to 900 rpm, which accounts for the
higher than expected idle speed.
If the engine controls are fixed speed, the engine will not idle
down at all.
See an Authorized Briggs & Stratton Dealer for carburetor
adjustment of a choke equipped engine.
On a choke equipped carburetor air/fuel mixture is not
adjustable. Use a tachometer to adjust idle speed. Start engine
and warm up about 5 minutes. With engine running, place
equipment throttle control in SLOW position. Rotate carburetor
Ê
throttle lever
adjusting the idle speed screw
(Governed idle has been set to 2000 at the factory.)
Î
could cause a fire.
Ê
Ï
, remove
Ë
. Move governor control lever
Í
was set to the equipment
Î
must make good contact with stop
WARNING
against the idle speed screw and hold while
Ë
to obtain 1750 rpm.
Ë
4
STORAGE
Engines stored over 30 days need special attention.
To prevent gum from forming in fuel system or on essential
carburetor parts:
a) if fuel tank contains oxygenated or reformulated gasoline
(gasoline blended with an alcohol or an ether), run engine until
it stops from lack of fuel, or b) if fuel tank contains gasoline,
either run engine until it stops from lack of fuel, or add a
gasoline stabilizer to the gas in the tank.
Note: If stabilizer is used, run the engine for several
minutes to circulate the additive through the carburetor.
Then engine and fuel can be stored.
Change oil.
1.
Remove spark plug and pour about 15 ml (1/2
2.
oz.) of engine oil into cylinder. Replace spark plug
and crank slowly to distribute oil.
Clean engine of debris.
3.
Store in a clean and dry area.
4.
We recommend use of Briggs & Stratton Fuel Stabilizer
available from an Authorized Briggs & Stratton Service Dealer.
WARNING
DO NOT store near a stove, furnace or water
heater which uses a pilot light or any device
that can create a spark.
SERVICE
We recommend that you see an authorized Briggs & Stratton
Service Dealer for all maintenance and service of the outboard
and outboard parts. Use only genuine Briggs & Stratton parts.
Each Authorized Briggs & Stratton Service Dealer carries a
stock of Genuine Briggs & Stratton Parts and is equipped with
special service tools. Trained mechanics assure expert repair
service on all Briggs & Stratton engines. Only dealers
recognized as Authorized Briggs & Stratton" meet the higher
Briggs & Stratton service standards.
You may locate your nearest Authorized Briggs & Stratton
Service Dealer in our dealer locator map on our web site
www.briggspowerproducts.com or in the
Pages" directory under Lawn Mowers" or Engines, Gaso
line" or Gasoline Engines," or similar category.
Note: Walking fingers logo and Yellow Pages" are
registered trademarks in various jurisdictions.
Partial List of Genuine Briggs & Stratton Parts
Part
Oil (20 oz.)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil (48 oz.)
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil filter
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil pump kit (uses standard electric drill
to remove oil from engine quickly)
Fuel stabilizer (1 oz., 30 ml single use pouch)
Fuel stabilizer (4.2 oz., 125 ml bottle)
. . . . . . . . . . .
Fuel filter
. . . . . . . . . . . . . . . . . . . . . . . . .
Flat air cleaner cartridge
. . . . . . . . . . . . . .
Flat air cleaner pre cleaner
. . . . . . . . . . . . . . . . . .
Oval air cleaner cartridge
. . . . . . . . . . . . . . . . . . .
Oval air cleaner pre cleaner
. . . . . . . . . . . . . . . . .
Resistor spark plug
. . . . . . . . . . . . . . . . . . . . . . .
Long life platinum spark plug
. . . . . . . . . . . . . . . . .
(OHV engines - set gap to .020 in. or .50 mm)
Spark tester
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug wrench
. . . . . . . . . . . . . . . . . . . . . . . . .
Yellow
Part No.
100005
100028
692513
. . . . . . . . . .
5056
. . . . .
5058
5041
298090 (5018)
491588 (5043)
493537
498596
273356
499608
5066
19368
19374
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