Ski-Doo FORMULA S 1997, Shop Manual

Page: 109 / 926

Section 03 ENGINE
Sub-Section 09 (CARBURETOR AND FUEL PUMP)
03-09-2
REMOVAL
Remove air silencer(s). For S-Series, see BAT-
TERY 05-05.
Disconnect fuel inlet line.
Disconnect primer line from carburetor on some
models.
Disconnect choke cable on some models.
Unscrew carburetor cover no. 1 then pull out
throttle slide no. 5 from carburetor.
WARNING : Exercise care when handling
throttle slide. Scratches incurred may
cause throttle slide to stick open in operation.
Disconnect throttle cable from throttle slide.
Untighten rubber flange clamps then remove car-
buretor from engine.
CLEANING AND INSPECTION
The entire carburetor should be cleaned with a
general solvent and dried with compressed air be-
fore disassembly.
CAUTION : Heavy duty carburetor cleaner
may be harmful to the float material and
to the rubber parts, O-rings, etc. Therefore, it is
recommended to remove those parts prior to
cleaning.
Carburetor body and jets should be cleaned in a
carburetor cleaner following manufacturer’s in-
structions.
WARNING : Solvent with a low flash point
such as gasoline, naphtha, benzol, etc.,
should not be used as they are flammable and
explosive.
Check inlet needle tip condition. If worn, the inlet
needle and seat must be replaced as a matched
set.
NOTE : Install needle valve for snowmobile
carburetor only. It is designed to operate
with a fuel pump system.
Check throttle slide for wear. Replace as neces-
sary.
Check idle speed screw straightness. Replace as
necessary.
IDENTIFICATION
All carburetors are identified on their body.
1. Identification : 34-482
Check for fuel inside float no. 12 .
If fuel is noticed :
– Check cap no. 11 for fuel tightness ; replace as
necessary.
– Check float for cracks or other damage affect-
ing fuel tightness; replace as necessary.
DISASSEMBLY AND ASSEMBLY
NOTE : To ease the carburetor disassembly
and assembly procedures it is recommend-
ed to use carburetor tool kit (P / N 404 1120 00).
2,3, E-clip and Needle
Remove screws from needle retaining plate to
withdraw the needle.
The position of the needle in the throttle slide is
adjustable by means of an E-clip inserted into 1 of
5 grooves located on the upper part of the needle.
Position 1 (at top) is the leanest, 5 (at bottom) the
richest.
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