Spark Plugs; Spark Plug Inspection - Polaris Sportsman Forest 500 Series Owner's Manual For Maintenance And Safety

MAINTENANCE

Spark Plugs

Spark Plug Recommendations
Refer to the specifications section beginning on page 120 for the recom-
mended spark plug type and gap for your vehicle. Torque spark plugs to
specification.
Plug Condition
New Spark Plug
Previously Installed Spark Plug

Spark Plug Inspection

Spark plug condition is indicative of engine operation. Check the spark
plug firing end condition after the engine has been warmed up and the
vehicle has been driven at higher speeds. Immediately check the spark
plug for correct color. See page 99.
Normal Spark Plug
The normal insulator tip is tan or 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.
The tip should not be white. A white insulator tip indicates overheating,
caused by use of an improper spark plug or incorrect carburetor adjust-
ments.
Wet Fouled Spark Plug
The wet fouled 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 of fouling are excessive oil, use
of non-recommended oil, improper use of the choke, or incorrect carbu-
retor adjustments.
98
Torque Specification
12-15 N-m
23-27 N-m