Selecting Carburetor Main Jet(S) - Arctic Cat S2008ACAAAUSG Operator's Manual

! WARNING
DO NOT operate the snowmobile
when any component in the throt-
tle system is damaged, frayed,
kinked, worn, or
adjusted. If the snowmobile is
operated when the throttle system
is not functioning properly, per-
sonal injury could result.
SELECTING
CARBURETOR MAIN
JET(S)
Altitude, temperature, and the use of
oxygenated gasoline affect the carbure-
tion needed for optimum engine perfor-
mance. The carburetor main jet(s) must
be changed in conjunction with
changes in operating altitude, oxygen-
ated gasoline usage, and temperature.
As the ambient temperature rises or as
the snowmobile is operated at a higher
altitude, the main jet(s) must be
replaced with leaner main jet(s). The
original equipment (production) main
jet(s) may need to be changed (depend-
ing on the type of gasoline you are
using, your operating altitude, and tem-
perature). A Main Jet Chart decal is
located beneath the hood of the snow-
mobile. It should be noted that when
selecting the proper main jet(s), it is
better to be too rich rather than too
lean. To change carburetor main jet(s),
use the following procedure:
! 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 carbure-
tor main jet must be one size
larger than the main jet required
for regular unleaded gasoline.
MAINTENANCE
 NOTE: Carburetor main jet(s)
may be changed by the snowmo-
bile owner if qualified to do so. If
the owner does not feel qualified,
take the snowmobile to an autho-
rized
improperly
dealer for this service. This ser-
vice is at the discretion and
expense
owner.
A main jet which is too small will
cause severe engine damage.
Engine damage caused by lean
jetting WILL NOT BE covered by
our warranty policy.
! WARNING
Whenever any maintenance is
performed on the fuel system,
there should be no welding,
smoking, open flames, etc., in the
area.
1. Loosen each carburetor flange
clamp and remove each carbure-
tor 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.
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
baffle ring/washer. Tighten the
main jet securely.
Arctic Cat Snowmobile
of the snowmobile
! CAUTION
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