TM-3740-214-14
Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE OPERATES ERRATICALLY (Continued)
Figure 5-161. Carburetor Needle Valve Removal
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 8b.
(3)
If the needles are damaged and cannot be repaired, replace them and go to Step 8b.
b.
Adjust the needle valves.
(1)
Turn both needle valves all the way to the right (clockwise) until they gently touch bottom.
(2)
Turn the main fuel needle valve to the left (counterclockwise) two full turns.
(3)
Turn the idle needle valve to the left (counterclockwise) 1-1/4 turns.
(4)
Go to Step 8c.
c.
Remove the carburetor from the engine.
(1)
Remove the air cleaner and air cleaner bracket.
5-146
