Spark Plugs - Arctic Cat 2015 ZR 6000 Operator's Manual

CAUTION
After operating the snowmobile for
the initial 5-10 minutes, stop the
engine, allow the engine to cool
down, and check the coolant level.
Add coolant as necessary.

NOTE: The tabs on the MAG side
of the coolant tank are to hold extra

spark plugs.

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.
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.
1. Remove the springs securing the
expansion chamber to the exhaust
manifold and resonator.
2. Move the expansion chamber out of
the way to access the spark plugs.
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.
30
6. Tighten the spark plugs to 19 ft-lb;
then install the spark plug caps.
7. Place the expansion chamber into
position and secure to the exhaust
manifold and resonator with the
springs.
8. Install the hood.
Checking Spark Plugs
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.
XM130A
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).

NOTE: If the center electrode insu-
lators are light gray, white, or black
and if the oil-injection pump syn-
chronization and ignition timing are
correct, different heat-range spark
plugs may be necessary. Authorized
Arctic Cat Snowmobile dealers have
detailed
Consult a dealer before changing
spark plugs, as incorrect heat-range
spark plugs
engine performance or engine dam-
age.
spark plug information.
could cause
AO352A
poor