Polaris Trail RMK - Manual (Page 79)

76
MAINTENANCE
Spark Plugs
It’s very important to use the correct spark plug for your machine. A
spark plug with a heat range too high will cause engine damage. A spark
plug with a heat range too low will cause excessive fouling and engine
malfunctioning.
In selecting a spark plug heat range for production, a manufacturer
assumes that the engine will be operated under extreme heavy duty con-
ditions and selects a spark plug that will protect the engine from internal
damage if the purchaser actually does operate the engine in this manner.
This selection could cause the customer who normally operates the
engine under medium or light duty to have spark plug failure.
A new engine can cause temporary spark plug fouling due to the preser-
vative added during the assembly process. Avoid prolonged idle speeds,
which cause plug fouling and carbonization.
• Use recommended spark plugs with the proper gap. Refer to the spec-
ifications section beginning on page 110.
• Spark plug torque is 18-22 ft. lbs. (24.4-29.8 Nm).
• Always carry spare spark plugs in case of an emergency.
CAUTION
A spark plug with a heat range too high will always cause engine damage if
the engine is operated in conditions more severe than intended for that plug.
Always use the spark plugs recommended for your snowmobile. Refer to the
specifications section beginning on page 110.
CAUTION
Using non-recommended spark plugs can result in serious engine damage.
Always use Polaris-recommended spark plugs.