Hac Operation - BOMBARDIER 1996 Ski-doo MX Z440 Handbook

Section 04 ENGINE PREPARATION

3.4 HAC Operation

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A01C32S
1. Carburetor vacuum hoses manifold
2. Choke jets manifold
3. Vacuum generated by the engine induction
4. Idle air bv-Dass (vervsmall hole)
5. Hac ven~u~i vacuum inlet from needle jet diffuser
6. Throttle slide
7. Jet needle
8. Needle jet
9. Pressured room controlled by hac
10. Main jet
11. Float bowl fuel
12. Carburetor float bowl
13. Sealed room plug
14. Sealed room
15. Diaphragm
16. Diaphragm return spring
17. Atmospheric pressured room
18. Atmospheric pressure
19. Vacuum jet needle (attached to diaphragm base)
20. Vacuum choke jet
04-92
18
VACUUM HOSE
VACUUM HOSE FROM THE HAC CONNECTED TO CARBURETOR
TO WHAT IS USUALLY CONSIDERED AS "AIR VENTS"
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