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FUEL SYSTEM/CARBURETION
4.3
BST 40 CARBURETOR EXPLODED VIEW
1. Cable Guide
2. Throttle Shaft Assy.
3. Ring
4. Spring
5. Screw
6. Washer
7. Case
8. Air Jet
9. Carburetor
10. Plunger Assy.
11. Spring
12. Plunger Cap
13. Cap
14. E--Ring
15. Packing
16. Seal
17. Screw
18. Throttle Valve
19. Pilot Jet
20. Needle Valve
21. O--Ring
22. O--Ring
23. Cover
24. Screw
25.Throttle Adjuster Spring
26. Washer
27. Cable Adjuster
28. Clip
29. Guide Screw
30. O--Ring
31. Main Jet
32. Ring
33. Screw
34. Float Body Assy.
35. Seal
36. Float Assy.
Refer to Page 4.7 for Jet Part Numbers
1
2
3
4
5
Jet Needle
“E” Clip Position
500 Engine Carburetor
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
16
22
23
24
25
26
27
5
28
36
35
34
33
32
31
30
29
NOTE: Refer to the Parts Manual for available parts and part numbers.