2001 Polaris Sportsman 400-500 DUSE and H.O. Service Manual, Page 48Get this manual
MAINTENANCE
SPARK PLUG
1Remove spark plug high tension leadClean plug area so no dirt and debris can fall into engine when plug is removed2Remove spark plug3Inspect electrodes for wear and carbon buildupLook for sharp outer edge with no rounding or erosion of the electrodes4Clean with electrical contact cleaner or glass bead spark plug cleaner onlyCAUTION: wire brush or coated abrasive should not be used5Measure gap with wire gaugeRefer to specifications for proper spark plug type and gapAdjust gap if necessary by bending the side electrode carefully6If necessary, replace spark plug with proper typeCAUTION: Severe engine damage may occur if the incorrect spark plug is used7Apply small amount of anti-seize compound to the spark plug threads8Install spark plug and torque to 14 ftlbsSpark Plug Gap .024.028 (.6.7 mm) Recommended Spark Plug: Refer to Specifications