Briggs & Stratton 420000 - Manual (Page 13)

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13
MAINTENANCE
ENGINE AND ENGINE PARTS
We recommend that you see an authorized Briggs & Stratton Service Dealer for all maintenance and service of the engine
and engine parts. Use only genuine Briggs & Stratton parts.
WARNING
If you perform any maintenance on the engine, first disconnect the spark plug wire
from the spark plug, and disconnect the battery at the negative terminal (electric
starter engines only) to prevent unintentional sparking. Unintentional sparking can
result in fire or electric shock. Unintentional start-up can result in entanglement,
traumatic amputation or laceration. Use only correct tools.
WARNING
• Do not strike the flywheel with a hammer or hard object because the flywheel may
later shatter during operation.
• Do not tamper with governor spring, links or other parts to increase engine speed.
MUFFLER
Replacement parts for the
muffler must be the same and
installed in the same position
as the original parts, other-
wise fire can occur.
If muffler is equipped with spark
arrestor screen, remove
screen for inspection. Replace screen if damaged or plugged.
WARNING
FUEL SYSTEM
Replacement parts for fuel
system (cap, hoses, tanks,
filters, etc.) must be the same
as original parts, otherwise
fire can occur.
WARNING
FUEL FILTER (if equipped)
PART NO. 394358
(WITH FUEL PUMP) PART NO. 298090 or 5018
(WITHOUT FUEL PUMP)
FILTER
[1] Disconnect spark plug
wires and keep away
from spark plugs.
[2] Drain fuel tank or close
fuel shut-off valve before
replacing fuel filter.
Otherwise, fuel can leak
out, creating a fire/explo-
sion hazard.
WARNING
SPARK PLUG
Use only Briggs & Stratton Spark Tester (part number
19368) to check for spark.
Note: In some areas, local
law requires using resistor
spark plug to suppress igni-
tion signals. If this engine
was originally equipped with
resistor spark plug, use
same type for replacement.
.030” (0.76 mm)
WIRE GAGE
RESISTOR P/N 802592
AIR COOLING SYSTEM
Debris may clog
the engine’s air
cooling system.
Remove blower
housing and
clean area shown
to prevent over-
heating and en-
gine damage.
CLEAN AREAS OF
ALL DIRT AND DEBRIS