AD Boivin 2002 Snow Hawk, Service Manual

Page: 32 / 173

FUEL SYSTEM 3 - 10
The illustration on the right shows which parts of the
carburetor start or stop functioning depending on the position
of the throttle slide.
Please note that the widest part of each symbol corresponds
to the slide opening for which the influence of a particular
component is the greatest. For example, the throttle slide
projection starts working at the closed position, reaches its
maximum influence when the opening is 1/4, and stops
when the opening is 1/2.
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NOTICE:
For high altitude conditions, refer to the appendix “Technical
Information for use at High Altitude”. This appendix provides
information concerning calibration depending on altitude and
temperature.
Installation
t t
CAUTION
Never allow throttle slides to close abruptly.
To re-install the carburetors, carry out the removal operations in
reverse order, inspecting first the accelerator cable and housing.
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NOTICE:
Be sure to re-install the carburetor with the red dot on the MAG
side and the carburetor with the blue dot on the PTO side.
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CAUTION
Verify to see if either of the rubber intake boots are
fissured or damaged. When installing, make sure these
boots are securely fastened to the intake manifold.
Otherwise, the engine will be severely damaged.
Attach the accelerator cable to the needle retaining plate.
CARBURETOR OPERATION VS. SLIDE OPENING
Slide Position
Wide Open
Closed
Air screw position and
Pilot Jet
Throttle slide cutaway
Needle taper and position
Needle Jet
Main Jet
Throttle cable
Throttle slide
Needle retaining
plate