Timing Belt Inspection - Mercury 8 Bigfoot 4-Stroke User Manual
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3.
Set the spark plug gap to specification.
Spark Plug
Spark plug gap
4.
Before installing spark plugs, clean off any dirt on the spark plug seats. Install plugs finger tight, and then
tighten 1/4 turn or torque to specifications.
Description
Spark plug
Timing Belt Inspection
1.
Inspect the timing belt and have it replaced by an authorized dealer if any of the following conditions are
found.
a. Cracks in the back of the belt or in the base of the belt teeth.
b. Excessive wear at the roots of the cogs.
c. Rubber portion swollen by oil.
d. Belt surfaces roughened.
e. Signs of wear on edges or outer surfaces of belt.
MAINTENANCE
ob00423
1.0 mm (0.040 in.)
Nm
27
61
ob00424
lb. in.
ob00634
lb. ft.
20
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