GB
4
Maintenance (seefigs. ¦§¨)
Also,see Maintenance Schedule. Follow the hourly or
calendar intervals, whichever occur first. More frequent
serviceis r equired when operatingin adv erse conditions.
To prevent acci-
dental starting, re-
move spark plug
wireand ground
it before servicing,
anddisconnect battery at negative terminal, if equipped.
Oilservice (seefig. ¦)
Checkoil level regularly.
Besure correct oil level is maintained. Check every5
hours or daily, before starting engine. See oil filling
procedure,Oil Recommendations.
Changeoil.
Changeoil after first 5 hours of operation. Changeoil
while engine is warm. Refill with new oil of recom-
mendedSAE viscosity grade. (see fig. ©)
Gearreduction, if equipped
Remove oil fill plug and oil level plug .Drainoil
every100 hours of operation or every season. To refill,
pour SAE 30 oil into oil fill hole until it runs out level
checkhole. Replace both plugs. Oil fill plug has a vent
holeand must be installed on top of gear case cover.
Aircleaner service (seefig. §)
Replacepre-cleaner , if equipped, and/or cartridge
ifvery dirty or damaged.
1. Loosen screws or remove knob. Then remove
cover.
2. Remove pre-cleaner, if equipped, and cartridge
carefully to prevent debris from falling into
carburetor.
Toservice pre -cleaner,wash in liquid detergent and
water.Squeeze dry in a clean cloth. Saturate in engine
oil.Squeeze in c lean, absorbent cloth to remove ALL
EXCESSoil.
Toservice cartridge, clean by tapping gently on a flat
surface. Do not use petroleum solvents, e.g.,
kerosene,which will cause cartridge to deteriorate. Do
notus e pressurized air,which can damage cartridge.
Donot oil cartridge.
3. Reinstall cartridge and pre-cleaner, if equipped.
4. Replace cover and tighten screws or knob
securely.
Maintenance Cont’d
Sparkplug service (seefig. ¨)
DO NOT check
f
or spark
with spark plug removed.
Useonly Briggs & Stratton
Spark Tester, to c heck
forspark.
DO NOT crank engine with spark plug removed. If
engineis flooded, place throttle in FASTand c rank until
enginestarts.
Sparkplug gap should be .76 mm or 0.030 in.
Clean/replace spark plug every 100 hours or every
season, whichever occurs first. Spark plug wrench is
available from any Authorized Briggs & Stratton
ServiceDealer.
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
sametype of spark plug for replacement.
Keepengine clean (seefig. ¨)
Periodically remove chaff and debris build-up from
engine.Clean finger guard. Do not spray engine with
waterto clean because w ater could contaminate fuel.
Cleanwith a brush or compressed air.
A
ccumulationo
f
debrisaround mu
f
-
fler could cause a fire. Inspect
andclean before every use.
Toassure smooth operation, keep gov ernor linkage,
springsand controls free of debris.
If muffler is equipped with spark arrester screen ,
removespark arrester screen for cleaning and inspec-
tion every 50 hours or every season. Replace if
damaged.
Clean cooling system. Chaff or debris may clog
engine’sair cooling system, especially after prolonged
operation. Internal cooling fins and surfaces may
require cleaning to prevent overheating and engine
damage.Removeblowerhousing and clean as shown .
Maintenance Schedule
Followthe hourly or calendar intervals, whichever
occurfirst. More frequent service is required when
operatingin adverse conditions noted below.
First5 Hours
DChangeoil
Every5 hours or daily
DCheckoil level
DCleanfinger guard
DCleanaround muffler
Every25 hours or every season
DChange oil if operating under heavy load or
highambient temperature
DServiceair cleaner pre-cleaner, if equipped*
DServiceair cleaner cartridge if no pre-cleaner*
Every50 hours or every season
DChangeoil
DCleanand inspect spark arrester, if equipped.
Every100 hours or every season
DServiceair c leaner cartridge if equipped with
pre-cleaner*
DReplace/cleanspark plug
DChangeoil, gear reduction, if equipped
DCleancooling system*
*Clean more often under dusty conditions,or
whenairborne debris or chaff is present.
PartialList of Genuine Briggs & Stratton Parts
Briggs& Stratton (or equivalent)
Part PartNo.
Oil(20 oz.) 100005........................
Oil(48 oz.) 100028........................
Oilpump kit (uses standard electric drill 5056.....
toremove oil from engine quickly)
Fuelstabilizer (1 oz., 30 ml single use pouch) 992030
Fuelstabilizer (4.2 oz., 125 ml bottle) 999005E (5041)
Flatair cleaner cartridge 491588(5043).........
Flatair cleaner pre-cleaner 491435............
Resistorspark plug 802592E.................
Standardspark plug 492167.................
Longlife platinum spark plug 992041(5062)......
(usedon most L-head engines)
Sparktester 19368........................
Sparkplug wrench 89838(5023)..............
Sparkarrester 399541......................