Maintenance Schedule - Briggs & Stratton Classic 450 Series Operating & Maintenance Instructions

Maintenance Cont'd
Spark plug service (see fig.
)
DO NOT check for spark with
spark plug removed. Use
only Briggs & Stratton Spark
Ê
Tester , to check for spark.
DO NOT crank engine with spark plug removed. If en-
gine is flooded, place throttle in FAST and crank until
engine starts.
Ë
Spark plug gap should be .76 mm or 0.030 in.
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.
Keep engine clean (see fig.
)
Periodically remove grass and chaff build-up from en-
Ê
gine. Clean finger guard . Do not spray engine with
water to clean because water could contaminate fuel.
Clean with a brush or compressed air.
Accumulation of debris around muf-
fler Î could cause a fire. Inspect and
clean before every use.
If muffler is equipped with spark arrester screen
move spark arrester screen for cleaning and inspec-
tion. Replace if damaged.
Clean cooling system. Grass or chaff may clog engine's
air cooling system, especially after prolonged service
cutting tall, dry grass. Internal cooling fins and surfaces
may require cleaning to prevent overheating and en-
gine damage.
Ì
Remove 3 screws and lift blower housing to clean
Í
areas within heavy line .
Do not loosen 2 band brake bracket screws
Do not bend or remove flywheel guard
GB

Maintenance Schedule

Follow the hourly or calendar intervals, whichever
occur first. More frequent service is required when
operating in adverse conditions noted below.
First 5 Hours
D Change oil
Every 5 hours or daily
D Check oil level
D Clean finger guard
D Clean around muffler
Every 25 hours or every season
D Change oil if operating under heavy load or
high ambient temperature
D Service air cleaner Oil-Foam® element*
Every 50 hours or every season
D Change oil
D Inspect spark arrester, if equipped.
Every 100 hours or every season
D Clean cooling system*
D Replace spark plug
*
Clean more often under dusty conditions,or
when airborne debris is present or after pro-
longed operation cutting tall, dry grass.
Partial List of Genuine Briggs & Stratton Parts
Ë
, re-
Briggs & Stratton (or equivalent)
Part
Oil (20 oz.) . . . . . . . . . . . . . . . . . . . . . . . .
Oil pump kit (uses standard electric drill
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)
Oil-Foam® air cleaner element
Oil-Foam® . . . . . . . . . . . . . . . . . . .
Î
.
air cleaner element used with cup
Ï
. Resistor spark plug
Standard spark plug
Long life platinum spark plug
(used on most L-head engines)
Spark tester . . . . . . . . . . . . . . . . . . . . . . . .
Spark plug wrench
Spark arrester . . . . . . . . . . . . . . . . . . . . . .
Part No.
100005
. . . . . . 5056
. . . . . . . . . 698369
272235 (5047)
. . . . . . . . . . . . . . . . . 802592E
. . . . . . . . . . . . . . . . 492167E
. . . . . . 992041 (5062)
19368
. . . . . . . . . . . . . 89838 (5023)
398067
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