Ski-Doo FORMULA S 1997, Shop Manual

Page: 110 / 926

Section 03 ENGINE
Sub-Section 09 (CARBURETOR AND FUEL PUMP)
03-09-3
NOTE : The last digit of the needle identifi-
cation number gives the recommended posi-
tion of the E-clip from the top of the needle.
CLIP POSITIONS
The size of the throttle slide cut-away affects the
fuel mixture between 1/8 to 1/2 throttle opening.
1. Low cut-away (high air speed)
2. Rich mixture
3. High cut-away (low air speed)
4. Lean mixture
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.
– 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
Example : 6DH4-3
Needle
identification Recommended position.
of the E-clip
from top
'
A00B2GA
1
2
3
4
5
Lean
Rich
1
3
2
4
A00C01A
A01C5AA
H