Spark Plugs (Bearcat Z1 Xt/Tz1 Models); Spark Plugs (Bearcat 570/T570 Models) - Arctic Cat Bearcat 570 Operator's Manual

As the ambient temperature rises or as
the snowmobile is operated at a higher
altitude, the main jets must be replaced
with leaner main jets. The original equip-
ment (production) main jets may need to
be changed (depending on the type of
gasoline you are using, your operating
altitude, and temperature). A Carburetor
Jet Chart decal is located on the belt
guard of the snowmobile. It should be
noted that when selecting the proper
main jets, it is better to be too rich rather
than too lean. To change carburetor main
jets, use the following procedure:
! WARNING
Whenever any maintenance is per-
formed on the fuel system, there
should be no welding, smoking,
open flames, etc., in the area.
CAUTION
Use only GENUINE Mikuni brass
main jets. Also, if using an oxygen-
ated gasoline (up to 10% ethanol
or up to 15% MTBE), the carburetor
main jet must be one size larger
than the main jet required for regu-
lar unleaded gasoline.
CAUTION
A main jet which is too small will
cause severe
Engine damage caused by lean jet-
ting WILL NOT BE covered by Arc-
tic Cat Inc. warranty policy.
1. Loosen each carburetor flange
clamp and remove each carburetor
from the intake flange and boot.
2. Remove each drain plug and O-
ring from the carburetor float
chamber and drain the gas into a
small container or shop towels.
MAINTENANCE
engine damage.
3. Using the main jet wrench (from
the tool kit), thread the main jet
out of each carburetor. Account for
the baffle ring/washer. Install the
new main jet and the existing baf-
fle ring/washer. Tighten the main
jet securely.
4. Install each drain plug and O-ring;
then tighten securely.
5. Install and secure the carburetors.
SPARK PLUGS
(Bearcat Z1 XT/TZ1
Models)
 NOTE: If spark plugs must be
replaced, take the snowmobile to
an authorized Arctic Cat Snowmo-
bile dealer for inspection and ser-
vice. This service
discretion and expense of the
snowmobile owner.
SPARK PLUGS
(Bearcat 570/T570
Models)
 NOTE: Always use the recom-
mended spark plugs in the engine.
See the appropriate specifications
chart for correct spark plug gap.
Varying terrain conditions and operat-
ing usage may require spark plugs of a
different heat range. For example, sus-
tained 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.
0728-054
is at the
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