Spark Plug; Engine Idle Rpm Adjustment - Arctic Cat 2008 300 DVX Owner's Manual

SPARK PLUG

The ATV comes equipped with a specifi ed spark plug. See the
specifi cations chart for the correct spark plug. A light brown insulator
indicates that the plug is correct. A white or dark insulator indicates
that the engine may need to be serviced or the carburetor may need
to be adjusted.
Consult an authorized Arctic Cat ATV dealer if the plug insulator is not
a light brown color. To help prevent cold weather fouling, make sure
to thoroughly warm up the engine before operating. To maintain a hot,
strong spark, keep the plug free of carbon.
Before removing the spark plug, be sure to clean the area around the

ENGINE IDLE RPM ADJUSTMENT

To properly adjust the idle, a tachometer is necessary. If one is not
80
spark plug. If you do not, dirt could
enter engine when removing or
installing the spark plug.
Adjust the gap to 0.7-0.8 mm for
proper ignition. Use a feeler gauge
to check the gap.
When installing the spark plug, be
sure to tighten it securely. A new
spark plug should be tightened
1/2 turn once the washer contacts
the cylinder head. A used spark
plug should be tightened 1/8 - 1/4
turn once the washer contacts the
cylinder head.
available, take the ATV to an
authorized Arctic Cat ATV dealer.
To adjust idle RPM:
1. Start the engine and warm it up
to normal operating temperature.