AD Boivin 2002 Snow Hawk, Service Manual

Page: 30 / 173

FUEL SYSTEM 3 - 8
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WARNING
The use of highly volatile solvents such as gasoline,
naphtha, benzol, etc., is prohibited since these products
are flammable and explosive.
o
Verify the condition of the tip of the fuel inlet valve. If the
tip is worn, replace both the valve and its seat.
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NOTICE:
Install only a snowmobile carburetor inlet valve as it is designed
to function with a fuel pump.
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Check to see if the throttle slide is worn and replace it if
need be.
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Check for the presence of fuel in the float.
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If there is fuel inside the float, inspect it for possible
fissures or other damage that would indicate it is no
longer hermetically sealed. Replace the float if
necessary.
Dismantling and assembling
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NOTICE:
To facilitate the dismantling and re-assembling of the carburetor,
it is recommended to use a tool kit (P/N 404 1120 00).
Calibration
Initial settings
SNOW HAWK™ carburetors must be adjusted as follows:
Needle
Remove the screws from the needle retaining plate in order
to be able to pull the needle out.
The position of the needle inside the accelerator slide is
adjusted by inserting an E-clip into one of the 5 notches at
the top part of the needle. Position 1 (the highest) gives the
leanest mixture, while position 5 (the lowest) gives the richest
mixture
Needle
Lean
Rich
MAG PTO
Pilot jet 60 60
Air screw 1.5 Tours 1.5 Tours
Slide cutaway 2.5 2.5
Needle jet P-0 (#159) P-0 (#159)
Needle 6DH2-3 6DH2-3
Main jet 205 220
Fuel level 23.9mm 23.9mm
Settings
Mikuni VM34