Polaris 2003 MSX - Manual (Page 83)

81
MAINTENANCE AND LUBRICATION
Spark Plugs
Always use the recommended spark plugs for your
Polaris watercraft and make sure the spark plug gap is
within specification. Measure gap (1) with a wire
thickness gauge.
S Use NGK PZFR6H spark plugs.
S Proper electrode gap is .028″ +/- .002″
(.71 mm +/- .05 mm).
S Spark plug torque is 18 ft. lbs. (24 Nm).
Spark plug condition is indicative of engine operation.
The spark plug firing end condition should be read
after the engine has been warmed up and the vehicle
has been driven at higher speeds. Immediately check
the spark plug for correct color.
S A slightly brownish tip is considered normal. The
engine is running properly.
S A yellow tip is caused by salt water mist ingestion.
This conductive coating will eventually cause foul-
ing. This is a normal situation.
NOTE: If the spark plug tip is black or grey, have the
watercraft serviced by an authorized Polaris dealer as
soon as possible.
S A black tip indicates several potential problems: the
wrong spark plug (wrong heat range) is being used;
excessive idling occurs;
the carburetor idle speed
mixture or high speed mixture is too rich or the
RPM limiter is malfunctioning.
S A light grey or white tip indicates that the wrong
spark plug (wrong heat range) is being used; the car-
buretor idle speed mixture is too lean; a fuel filter is
plugged or an engine seal or gasket is leaking.
1
CAUTION
Using non-recommended spark plugs can result
in serious engine damage. Always use the spark
plugs recommended for your Polaris watercraft.