Precautions; Maintenance; Flame Arrestor With Carburetor Cover - Mercury 305 CID Service Manual

Precautions

! WARNING
Always disconnect battery cables from battery
BEFORE working on fuel system to prevent fire
or explosion.
! WARNING
Be careful when cleaning flame arrestor and
crankcase ventilation hose; gasoline is extreme-
ly flammable and highly explosive under certain
conditions. Be sure that ignition key is OFF. DO
NOT smoke or allow sources of spark or open
flame in area when cleaning flame arrestor and
crankcase ventilation hose.
! WARNING
Be careful when changing fuel system compo-
nents; gasoline is extremely flammable and
highly explosive under certain conditions. Be
sure that ignition key is OFF. DO NOT smoke or
allow sources of spark or flame in the area while
changing fuel filter. Wipe up any spilled fuel im-
mediately.
! WARNING
Make sure no fuel leaks exist, before closing en-
gine hatch.
Fuel Supply Connections
! CAUTION
DO NOT operate engine without cooling water
being supplied to water pickup holes in gear
housing, or water pump impeller will be damaged
and subsequent overheating damage to engine
may result.
Index
5B-6 - MERCARB 2 BARREL CARBURETOR

Maintenance

Flame Arrestor with Carburetor
Cover
NOTICE
Refer to "Precautions," in this section, BEFORE
proceeding.
1. Remove in the following order:
a. Nut.
b. Sealing washer.
c. Carburetor cover.
d. Crankcase ventilation hoses from flame ar-
restor and rocker arm covers.
e. Flame arrestor.
2. Clean and inspect:
a. Clean flame arrestor in solvent and blow dry
with compressed air.
b. Clean crankcase ventilation hoses.
c. Inspect crankcase ventilation hoses for
cracks or deterioration, and replace if neces-
sary.
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