MAINTENANCE
Spark
Plugs
The recommended spark plugs to
be used in this watercraft are
BPR8ES. The correct gap is .028
in.1.7 mm and should be measured
with a wire thickness gauge. Alter-
nate spark plugs include: Cham-
pion
RN3C and
ND
W24ESR-U.
The color of a used spark plug is indicative of the way the engine is running.
A slightly brownish tip is considered good. The engine is running properly and the
carburetor is adjusted correctly.
A black tip indicates several potential problems: the wrong spark plug (wrong heat
range) is being used; excessive idling; carburetor idle speed mixture or high speed
mixture is too rich; or there is a malfunction with the
RPM
limiter.
A light grey or white tip indicates: the wrong spark plug (wrong heat range) is being
used; carburetor idle speed mixture is too lean; there is a plugged fuel filter; or there
is a leaking engine seal or gasket.
A yellow tip is caused
by
salt water mist ingestion. This is a conductive coating
which will eventually cause fouling. This is a normal situation.
If the spark plug tip is black or grey have the watercraft serviced by an authorized
Polaris dealer as soon as possible.
A spark plug with cracked porcelain or damaged threads should be changed im-
mediately. If the electrodes are badly worn or burned the plug should also be re-
placed.
If the spark plug is in good condition, clean it with a clean shop cloth and/or wire
brush. Adjust the gap to
.028 inl.7 mm using
a
wire thickness gauge.
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