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Polaris Sportsman 500 HO Owner's Manual Page 95

Polaris industries all-terrain vehicles owner's manual.
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Spark Plugs
Spark Plug Inspection
Normal Spark 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 indi-
cates the proper type and heat range for the engine and the service.
The tip should not be flaky and white. A white insulator tip indicates
overheating, caused by use of an improper spark plug or incorrect carbu-
retion adjustments.
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 throt-
tle body/carburetor adjustments.



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  • Les Apr 02, 2017 12:02:
    I have not been able to see the manual.
  • user8 Dec 30, 2016 02:33:
    Since when did this place can the downloads? What a step backwards.
  • Michael earp Oct 20, 2015 12:02:
    Liquid cool product for 2000 Polaris