2007 Arctic Cat Four-Stroke Factory Service Manual, Page 133Get this manual
! NOTE: The thermostat is of the lock-open typeIf the thermostat is ever allowed to fully open, it will remain open and replacement will be necessary Checking Compression
1Remove the four mm cap screws securing the coil cover to the valve coverAO203
! NOTE: Before this test procedure, make certain the battery is fully charged
4Install the compression tester gauge with adapter into the spark plug hole; then with the throttle valve in the full-open position, crank the engine over to get the psi readingCompression should be 175 psi 10 at sea level
2Remove the three mm cap screws that secure the ignition coils to the valve coverRemove the ignition coils noting that the coil with the green tubing is coil #1Coil Wire Colors