Briggs & Stratton MS-5158-5/03 - Manual (Page 6)

Document: - page 4 (Black)
Screen angle and frequency: 45.0000, 150.0000
GB
4
Maintenance
(see figs. )
Also, see Maintenance Schedule. Follow the hourly or
calendar intervals, whichever occur first. More frequent service is
required when operating in adverse conditions.
See any Authorized Briggs & Stratton Dealer for correct
replacement parts
To prevent accidenĆ
tal starting, remove
spark plug wire Ê
and ground it before
servicing, and disĆ
connect battery at negative terminal, if equipped.
Oil service (see fig. )
Check oil level regularly.
Be sure correct oil level is maintained. Check every 8 hours or
daily, before starting engine. See oil filling procedure, Oil
Recommendations.
Change oil.
Change oil after first 8 hours of operation. Change oil while
engine is warm. Refill with new oil of recommended SAE
viscosity grade. (see fig.

)
Change oil filter Ë , if equipped.
Replace oil filter after every 100 hours of operation or every
season, whichever occurs first. Before installing new filter,
lightly oil filter gasket with fresh, clean engine oil. Screw filter
on by hand until gasket contacts oil filter adapter. Tighten 1/2 to
3/4 turn more. Start and run engine at IDLE to check for oil
leaks. Stop engine. Recheck oil level and add oil if required.
Oil pressure
If oil pressure drops below 1Ć4 psi (.1Ć.2 kg/cm 2 ), an oil
pressure switch (if engine is equipped) will either activate a
warning device or stop the engine. Check oil level with dipstick.
If oil level is between ADD and FULL mark on dipstick, do not
try to restart engine. Contact an Authorized Briggs & Stratton
Service Dealer. Do not operate engine until oil pressure is
corrected.
If oil level is below ADD mark on dipstick, add oil to bring level to
FULL mark. Restart engine and check oil pressure. If pressure is
normal, continue to operate engine.
Note: Oil pressure gauge, if engine is equipped, is supplied
by manufacturer of equipment.
Air cleaner, dual element (see fig. )
1. Unhook clips on sides of cover and remove cover.
2. Carefully slide preĆcleaner Ë off cartridge Ì .
3. Remove knob and plate. Carefully remove cartridge to
prevent debris from entering carburetor .
Replace preĆcleaner, if equipped, or cartridge if very dirty or
damaged.
To service cartridge, clean by tapping gently on a flat surface.
Do not use petroleum solvents, e.g., kerosene, which will
cause cartridge to deteriorate. Do not use pressurized air,
which can damage cartridge. Do not oil cartridge.
4. Reinstall cartridge, plate and knob.
5. Reassemble preĆcleaner on cartridge.
6. Replace cover and fasten clips.
Maintenance Cont'd
Spark plug service (see fig. )
DO NOT check for spark with
spark plugs removed. Use only
Briggs & Stratton Spark Tester
Ë, to check for spark.
DO NOT crank engine with spark plug removed. If engine is
flooded, place throttle in FAST and crank until engine starts.
Spark plug gap
Ì should be .76 mm or 0.030 in.
Replace spark plugs every season. Spark tester and spark
plug wrench are 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.
Keep engine clean (see fig. )
Periodically remove grass/chaff buildup from engine. Do not
spray engine with water because water could contaminate
fuel. Use a brush or compressed air.
Accumulation of debris around exhaust
manifold/muffler Í could cause a fire.
Inspect and clean before every use.
Keep linkage, springs and controls Í free of debris.
If muffler is equipped with spark arrester screen Î , remove spark
arrester screen for cleaning and inspection every 50 hours or
every season. Replace if damaged.
Replace inĆline fuel filter Ï every season.
Drain fuel tank or close fuel shutĆoff valve
before replacing filter.
Clean oil cooler Ð every 100 hours or every season, if
equipped.
Grass or chaff may clog engine's air cooling system, especially
after prolonged service cutting tall, dry grass. Every 100 hours
or every season, clean internal cooling fins and surfaces to
prevent overheating and engine damage. Remove blower
housing to clean areas shown Ñ .
Check valve clearance (intake and exhaust .10Ć.15mm)
Maintenance Schedule
Follow the hourly or calendar intervals, whichever occur
first. More frequent service is required when operating in
adverse conditions noted below.
First 8 Hours
D Change oil
Every 8 hours or daily
D Check oil level
D Clean around muffler, linkage and springs
Every 25 hours or every season
D Change oil if operating under heavy load or high
ambient temperature
D Service air cleaner preĆcleaner*
Every 50 hours or every season
D Change oil
D Clean and inspect spark arrester, if equipped
Every 100 hours or every season
D Service air cleaner cartridge*
D Replace oil filter, if equipped
D Clean oil cooler, if equipped*
D Clean cooling system*
Every season
D Replace spark plugs
D Replace inĆline fuel filter
D Check valve clearance
* Clean more often under dusty conditions, or when
airborne debris is present or after prolonged operaĆ
tion cutting tall, dry grass.
Partial List of Genuine Briggs & Stratton Parts
Briggs & Stratton (or equivalent)
Part Part No.
Oil (20 oz.) 100005 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil (48 oz.) 100028 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Oil filter (6 cm long) 492932 (5049) . . . . . . . . . . . . . . . . .
Oil pump kit (uses standard electric drill 5056 . . . . . . . . .
to remove oil from engine quickly)
Fuel stabilizer (1 oz., 30 ml single use pouch) 992030 . . . .
Fuel stabilizer (4.2 oz., 125 ml bottle) 999005E (5041) . . . .
Fuel filter (without fuel pump) 298090 (5018) . . . . . . . . . .
Fuel filter (with fuel pump) 493629 . . . . . . . . . . . . . . . . .
Air cleaner cartridge 394018 . . . . . . . . . . . . . . . . . . . . . .
(all models except model 380000)
Air cleaner preĆcleaner 272490 . . . . . . . . . . . . . . . . . . . .
(all models except model 380000)
Air cleaner (cartridge and preĆcleaner kit) 5050 . . . . . . . . .
(all models except model 380000)
Air cleaner cartridge (model 380000) 692519 . . . . . . . . . .
Air cleaner preĆcleaner (model 380000) 692520 . . . . . . . .
Resistor spark plug 491055E or 496018E . . . . . . . . . . . .
Long life platinum spark plug 5066 . . . . . . . . . . . . . . . . .
(used on most OHV engines)
Spark tester 19368 . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug wrench 19374 . . . . . . . . . . . . . . . . . . . . . . . .
Spark arrester 392390 . . . . . . . . . . . . . . . . . . . . . . . . . .