MAINTENANCE
59
3. Remove the spark plug caps from
the plugs.
4. Using a spark plug wrench,
remove the plugs.
5. Install the plugs and finger-
tighten.
6. Tighten the spark plugs to 2.5-2.8
kg-m (18-20 ft-lb); then install the
spark plug caps.
7. Place the console into position on
the headlight support bracket
keeping the rearward end slightly
elevated; then connect the main/
hood harness connector.
8. Lower the rearward end of the
console into position; then install
the two torx-head screws. Tighten
securely.
Removing/Installing
Spark Plugs
(Fan-Cooled Models)
1. Remove the spark plug caps from
the plugs.
2. Using a spark plug wrench,
remove the plugs.
3. Install the plugs and finger-
tighten.
4. Tighten the spark plugs to 2.5-2.8
kg-m (18-20 ft-lb); then install the
spark plug caps.
Removing/Installing
Spark Plugs (660 cc
Models)
1. Remove the spark plug/coil cover.
2. Remove the cap screws securing
the spark plug coils to the engine;
then remove the coils.
3. Using a spark plug wrench,
remove the plugs.
4. Install the plugs and finger-
tighten.
5. Tighten the spark plugs to 2.1 kg-
m (15 ft-lb); then install the spark
plug coils and secure them with
cap screws.
6. Install the spark plug/coil cover.
Checking Spark Plugs
(2-Stroke Models)
To see if the spark plugs being used
are of the proper heat range (after the
snowmobile has been operated under
normal driving conditions), remove
the spark plugs and examine the con-
dition of the center electrode insulator
of each spark plug.
AO352A
A. TAN or LIGHT BROWN
insulator indicates correct
spark plugs (heat range).
B. LIGHT GRAY or WHITE
insulator indicates over-heat-
ing of the engine. This condi-
tion is caused by a too lean
condition or incorrect spark
plugs (heat range too hot).
C. BLACK insulator indicates
fuel in the combustion cham-
ber is not burning completely.
This condition is caused by a
too rich condition, too much
oil, or incorrect spark plugs
(heat range too cold).
