Polaris Offroad Vehicle - Manual (Page 124)

114
MAINTENANCE
Spark Plugs
Check your owner’s manual supplement for recommended spark plug and gap.
The spark plug and its condition is indicative of engine operation. The spark plug
firing end condition should be read after the engine is warmed up and the vehicle
is driven at higher speeds. Immediately check the spark plug for correct color.
1. Normal
The insulator tip is gray, tan or light brown. There will be few combustion deposits.
The electrodes are not burned or eroded. This indicates the proper type and heat
range for the engine and the service.
NOTE: The tip should not be white. A white insulator tip indicates overheating,
caused by use of an improper spark plug or incorrect carburetion adjustments.
2. Wet Fouled
The insulator tip is black. A damp oil film covers the firing end. There may be a
carbon layer over the entire nose. Generally, the electrodes are not worn. General
causes are excessive oil, use of non-recommended injection oil, improper use of
the choke, or incorrect carburetion adjustments.
Spark Plug Removal and Replacement
WARNING: Never attempt to remove a spark plug while the engine is warm.
The exhaust system or engine could burn you causing severe injury.
The spark plug is removed by using the special wrench provided in the tool pouch
under the seat. Reach under the right hand fender and then back for access. Re-
move the spark plug cap and then the spark plug by rotating counterclockwise.
Reverse the procedure for spark plug installation. Torque to 17 ft. lbs.
Never deviate from the recommended spark plug as engine damage can occur.
Cylinder Head/Cylinder Base Fastener Torque
(2 Stroke Models)
Have your dealer check the ATV cylinder head and cylinder base fasteners for
proper torque at the first service or after 25 hours.