Ski-Doo Formula MACH 1, Shop Manual

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Section 04 ENGINE
Subsection 08 (CARBURETOR AND FUEL PUMP)
04-08-4
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.
Check for fuel soaked into float no. 12 ; replace as
necessary.
Check float for cracks or other damages affecting
free movement; replace as necessary.
IDENTIFICATION
All carburetors are identified on their body.
1. Identification: 34-482
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).
2,3, E-clip and Needle
All Models Except Mach Z Series
Remove screws from needle retaining plate to
withdraw the needle.
Mach Z Series
To remove needle or to change its position or to
remove throttle slide, remove caburetor cover.
Except for MAG side carburetor, unscrew locking
screw and adjusting nut form throttle shaft.
Move arm aside just enough for unscrewing Allen
screw retaining throttle slide.
For MAG side carburetor, raise throttle slide half
way then unscrew Allen screws.
1. Allen screw
2. Arm moved aside
3. Locking screw and adjusting nut removed
All Models
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.
NOTE: The last digit of the needle identification
number gives the recommended position of the
E-clip
from the top of the needle.
A01C59A
1
A00B2FA
Example: 6DH4-3
Needle
identification Recommended position.
of the E-clip
from top
A06C0KA
2
3
1