2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 24Get this manual

2003 Arctic Cat ATVs from 250cc to 500cc Service Manual, Page 24

3Remove the spark plug; then attach the high tension lead to the plug and ground the plug on the cylinder head well away
is abnormally low, inspect the following itemsAVerify starter cranks engine over BGauge is functioning properlyCThrottle
lever in the full-open position DValvetappet clearance correctEValve bent or burnedFValve seat burned NOTE: To service valves,
see Section 3 Testing Engine Compression To test engine compression, use the following procedure1Remove the high tension
lead from the spark plug2Using compressed air, blow any debris from around the spark plug 7Pour 29.5 ml (l fl oz) of oil
into the spark plug hole, reattach the gauge, and retest compression8If compression is now evident, service the piston rings
(see Section 3) Spark Plug A light brown insulator indicates that the plug is correctA white or dark insulator indicates