Ski-Doo Formula S 1998, Shop Manual

Page: 131 / 338

Section 04 ENGINE
Subsection 09 (CARBURETOR AND FUEL PUMP)
04-09-2
REMOVAL
Remove air silencer(s). For S-Series, see BAT-
TERY 06-05.
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.
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.
Carburetor body and jets should be cleaned in a
carburetor cleaner following manufacturer’s in-
structions.
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 carbu-
retor 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 soaked into float no. 12 . Replace as
necessary.
Check float for cracks or other damages affecting
free movement. Replace as necessary.
DISASSEMBLY AND ASSEMBLY
NOTE: To ease the carburetor disassembly and
assembly procedures it is recommended to use
carburetor tool kit (P/N 404 1120 00).
;
WARNING
Exercise care when handling throttle slide.
Scratches incurred may cause throttle slide
to stick open in operation.
-
CAUTION
Heavy duty carburetor cleaner may be
harmful to the float material and to the rub-
ber parts, O-rings, etc. Therefore, it is recom-
mended to remove those parts prior to
cleaning.
;
WARNING
Solvent with a low flash point such as gaso-
line, naphtha, benzol, etc., should not be
used as they are flammable and explosive.
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