9
8. If compression is now evident, service the piston
rings (see Engine/Transmission).
Spark Plug
A light brown insulator indicates that a 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.
To maintain a hot, strong spark, keep the plug free of car-
bon.
ATV-0051
Adjust the gap to correct specification (see General Infor-
mation for proper type and gap). Use a feeler gauge to
check the gap.
ATV0052
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.
Muffler/Spark Arrester
At the intervals shown in the Periodic Maintenance
Chart, clean the spark arrester using the following proce-
dure.
1. Remove the three cap screws securing the spark
arrester assembly to the muffler; then loosen and
remove the arrester.
CF105A
2. Using a suitable brush, clean the carbon deposits
from the screen taking care not to damage the screen.
NOTE: If the screen or gasket is damaged in any
way, it must be replaced.
3. Install the spark arrester assembly with gasket; then
secure with the three cap screws. Tighten to 48 in.-lb.
CF104
Engine/Transmission
Oil - Filter
OIL - FILTER
The engine should always be warm when the oil is
changed so the oil will drain easily and completely.
1. Park the ATV on level ground.
CAUTION
Before removing a spark plug, be sure to clean the area
around the spark plug. Dirt could enter engine when
removing or installing the spark plug.
! WARNING
Wait until the muffler cools to avoid burns.