Polaris Outlaw 450 MXR User Manual download pdf (Page 127)

123

Maintenance

Spark Plugs

Normal Plug

The normal 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.

The tip should not be white. A white insulator tip indicates overheating, caused by use of an

improper spark plug or incorrect carburetor/throttle body adjustments.

Wet Fouled 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 incor-

rect carburetion adjustments.

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Polaris Outlaw 450 MXR User Manual Page 127