2009 Arctic Cat 150 ATV Service Manual, Page 12Get this manual
Adjust the gap to 0.6 mm (0.024 in for proper ignitionUse wire feeler gauge to check the gapKM140B
ATV0052D
3Install the spark arrester and secure with the cap screwTighten securely
When installing the spark plug, make sure to tighten it securelyA new spark plug should be tightened 12 turn once the washer contacts the cylinder headA used spark plug should be tightened 18-14 turn once the washer contacts the cylinder head
Engine OilFilter
Replace the engine oil and clean the screenfilter at the scheduled intervalsThe engine should always be warm when the oil is changed so the oil will drain easily and completely1Park the ATV on level ground2Loosen the oil fill plug