Briggs & Stratton MS-5158-5/03 Maintenance (see figs.  ), Maintenance Cont'd, Maintenance Schedule, Oil service (see fig. ), Spark plug service (see fig. ), First 8 Hours, Every season

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 acciden2

tal starting, remove

spark plug wire Ê and ground it before servicing, and dis2

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 124 psi (.12.2 kg/cm2), 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 pre2cleaner Ë off cartridge Ì.

3.Remove knob and plate. Carefully remove cartridge to

prevent debris from entering carburetor.Replace pre2cleaner, 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 pre2cleaner 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 in2line fuel filter Ï every season.

Drain fuel tank or close fuel shut2off 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 .102.15mm)

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

DChange oil

Every 8 hours or daily

DCheck oil levelDClean around muffler, linkage and springs

Every 25 hours or every season

DChange oil if operating under heavy load or high ambient temperatureDService air cleaner pre2cleaner*

Every 50 hours or every season

DChange oil

DClean and inspect spark arrester, if equipped

Every 100 hours or every season

DService air cleaner cartridge*DReplace oil filter, if equippedDClean oil cooler, if equipped*DClean cooling system*

Every season

DReplace spark plugsDReplace in2line fuel filterDCheck valve clearance

*

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 pre2cleaner . . . . . . . . . . .	. . .	. . . . .	. 272490
(all models except model 380000)
Air cleaner (cartridge and pre2cleaner kit) .		. . . . .	. . . 5050
(all models except model 380000)
Air cleaner cartridge (model 380000) .	. . .	. . . . .	. 692519
Air cleaner pre2cleaner (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

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