Fuel System - Husqvarna 50 Workshop Manual

Trouble-shooting Chart
Start
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
A
B
c
Idle
D
E
F
G
H
J
Acceleration, Deceleration
K
L
M
High Speed
N
o
P
Metering System
26. Worn lever
27. Set too high
28. Set too low
29. Not free
30.
Distorted
31.
Improperly installed
32.
Leaking (air/fuel)
33.
Worn button
34.
Improper assembly
35.
Defective gasket
36.
Loose diaphragm rivet
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37. Hole in diaphragm
38. Loose cover screws
39. Foreign matter
40. Binding
41. Worn needle body or tip
Circuit Plate
42. Loose screws, bad gasket
43. Nozzle check valve
manuals search engine
Adjustments
Low speed needle
1.
2. High speed needle

Fuel System

Plugged tank vent
3.
4. Plugged tank filter
Restricted fuel line
5.
6. Dirt in fuel passage
7. Loose, damage fuel
line
8. Leak in pulse system
Restricted pulse
9.
channel
10. Loose pump cover
screws
11 Defective pump
diaphragm
Air System
12. Plugged air filter
13. Defective manifold
gasket
14. Loose carb. mounting
bolts
15. Worn throttle
assembly
16. Incorrect throttle
assembly
17. Loose throttle valve
screw
18. Throttle shaft too
tight
19. B&t throttle linkage
20. Defective throttle
spring
21. Bent throttle stop
lever
22. Choke not functioning
properly
23. Worn choke shaft
24. Worn choke valve
25. Worn throttle valve