Pilot/Air System - BOMBARDIER 1996 Ski-doo MX Z440 Handbook

, A01C50S
PILOT/ AIR SYSTEM
PRINCIPLES OF OPERATION
The pilot / air system controls the fuel mixture between idle and approximately the 1/4 throttle
position. As the throttle is opened wider for low speed operation, the pilot outlet cannot supply
adequate fuel, and fuel then enters the carburetor bore from the bypass as well as the pilot outlet.
The pilot / air system is tuned by first adjusting the air screw; then, if necessary, by replacing the
pilot jet.
I
LO
-. .
. 1
o,-
LOW FLOAT SETTING WILL
0
RESULT IN HARD STARTING
- LEAN RUNNING
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Section 04 ENGINE PREPARATION
04-63