Spark Plug Inspection And Replacement - Mercury 10 FOURSTROKE Installation Operation Maintenance Warranty Manual

The voltage regulator circuit and the electric starting circuit are protected from
overload by a 20 amp fuse. If the fuse is blown, try to locate and correct the
cause of the overload. If the cause is not found, the fuse may blow again.
a
20
20
b
a - Voltage regulator circuit ‑ 20 amp fuse
b - Spare fuse
c - Electric starting circuit ‑ 20 amp fuse
Open the fuse holder and look at the silver colored band inside the fuse. If band
is broken, replace the fuse. Replace the fuse with a new fuse with the same
rating.
a

Spark Plug Inspection and Replacement

Damaged spark plug boots may emit sparks that can ignite fuel vapors under
the engine cowl, resulting in serious injury or death from a fire or explosion.
To avoid damaging the spark plug boots, do not use any sharp object or
metal tool to remove the spark plug boots.
MAINTENANCE
c
b
b
28619
WARNING
!
90
20
20
32119
Identifying a blown fuse
a - Good fuse
b - Blown fuse
eng