23
XM471A
3. Install the filter and secure using the
two knobs.
4. Install the air filter housing cover and
secure with the clips.
5. Install the left-side access panel.
Spark Plugs
NOTE: Always use the recom-
mended spark plugs in the engine.
See the appropriate specifications
sheet for correct spark plug gap.
Varying terrain conditions and operating
usage may require spark plugs of a differ-
ent heat range. For example, sustained
cross-country riding will usually require
colder heat-range spark plugs while trail
riding or other continual slow speed
operation will usually require hotter heat-
range spark plugs.
Removing/Installing
NOTE: Spark plug maintenance
may be done by the snowmobile
owner if qualified to do so. If the
owner does not feel qualified, take
the snowmobile to an authorized
Arctic Cat Snowmobile dealer for
this service. This service is at the
discretion and expense of the snow-
mobile owner.
NOTE: For this procedure, the
hood and side panels must be
removed.
1. Remove the spark plug end caps.
2. Using a 3/8-in. drive ratchet,
adapter, and a 5/8-in. spark plug
socket, remove the spark plugs.
NOTE: Prior to installing the spark
plugs, check the gap between the
electrode and ground strap. The clear-
ance should be 0.7-0.8 mm (0.028-
0.031 in.).
3. Install the spark plugs. Tighten to 96
in.-lb.
4. Install the spark plug end caps.
5. Install the hood and access panels.
Checking
To see if the spark plugs being used are of
the proper heat range (after the snowmo-
bile has been operated under normal driv-
ing conditions), remove the spark plugs
and examine the condition of the center
electrode insulator of each spark plug.
AO352A
A. TAN or LIGHT BROWN insula-
tor indicates correct spark plugs
(heat range).
B. LIGHT GRAY or WHITE insula-
tor indicates over-heating of the
engine. This condition is caused by
a too lean condition or incorrect
spark plugs (heat range too hot).
C. BLACK insulator indicates fuel
in the combustion chamber is not
burning completely. This condi-
tion is caused by a too rich con-
dition, too much oil, or incorrect
spark plugs (heat range too cold).
CAUTION
If adjusting spark plug gap is neces-
sary, do not use the center electrode
as a leverage point. Damage to the
plug may occur.
Summary of Contents for M 9000 King Cat
Page 7: ...3 Snowmobile Safety Rules...