TM 5-3740-214-14
Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4. THE ENGINE IS HARD TO START (Continued)
Figure 5-69. Carburetor Needle Valve Removal
CAUTION
BE CAREFUL not to use force when turning the needle valves in and out. Force can damage the
valves.
a.
Remove the main fuel needle valve and idle fuel needle valve and check them for damage and/or
plugging.
(1)
If the needle valves are ok, go to Step lb.
CAUTION
DO NOT use hard metal objects to unplug the needle valves. Hard metal objects will damage
them.
(2)
If the needles are plugged or gummed up, rinse them in alcohol or acetone and return them to
the carburetor. Go to Step 1b.
(3)
If the needles are damaged and cannot be repaired, replace them and go to Step 1b.
b.
Adjust the needle valves.
(1)
Turn both needle valves all the way to the right (clockwise) until they gently touch bottom.
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