Ski-Doo FORMULA S 1997, Shop Manual

Page: 739 / 926

Section 03 ENGINE
Sub-Section 08 (CARBURETOR AND FUEL PUMP)
03-08-5
8, Main Jet
The main jet installed in the carburetor has been
selected for a temperature of -20°C (0°F) at sea
level. Different jetting can be installed to suit tem-
perature and/or altitude changes. Always check
spark plug tip and/or piston dome color to find out
correct jetting.
CARBURETOR FLOAT LEVEL
ADJUSTMENT
9,10, Float Arm and Float Arm Pin
Correct fuel level in float chamber is vital toward
maximum engine efficiency. To check for correct
float level proceed as follows:
– Make sure that float arm is symetric — not dis-
tored.
– Remove float bowl and gasket from carburetor.
All Models Except Mach Z/Z LT
– With carburetor chamber upside-down on a lev-
el surface, measure height H between bowl
seat and
top edge of float arm. Keep ruler per-
fectly vertical and in line with main jet hole.
TYPICAL
H: Float height (including float arm thickness)
1. Ruler vertical and in line with main jet
Mach Z/Z LT
Do not turn carburetor up side down. Measure-
float arm height when it just touches needle valve
without moving it.
To Adjust Height H:
– Bend the contact tab of float arm until the spec-
ified height is reached.
1. Contact tab
A01C5AA
H
CARBURETOR
MODEL
FLOAT HEIGHT H
±
1 mm (
±
.040 in)
Formula III/III LT 18.1 (.713)
Mach 1 18.1 (.713)
Mach Z/Z LT 20.0 (.787)
A01C5BA
1
A00C03A
1