TM 5-3740-214-14
Table 5-3. Direct and General Support Maintenance Troubleshooting (Continued)
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
ENGINE DOES NOT START BUT TURNS OVER (Continued)
(3)
Adjust the clearance by bending the float tab with a screwdriver if necessary.
(4)
Install a new baffle gasket, a new bowl gasket, the fuel bowl and a bowl screw. Make sure the
bowl gasket seats well.
(5)
Return the carburetor to the engine and go to Step 10f. Make sure the carburetor to manifold
gasket seals well.
f. Start the engine.
(1)
If the engine starts, the problem is solved. Go to Step 10g.
(2)
If the engine does not start, go to Step 11.
g. Adjust the carburetor while the engine is running.
(1)
Turn the main fuel needle valve to the right (clockwise) until the engine slows down.
(2)
Turn the main fuel needle valve back to the left (counterclockwise) until the engine slows down.
(3) Turn the main fuel needle valve back to the right to a position halfway between the slow-down
points.
Step 11. Make sure gasoline is getting to the cylinder.
a. Remove the spark plug.
b. Push the start button and crank the engine over a few times.
c. Smell for gasoline in the cylinder.
(1)
If there is gasoline present in the cylinder, check the seat between the carburetor and engine.
Make sure it is tight and does not leak air. Go to Step 11b.
(2)
If gasoline is getting to the cylinder, but it still does not start, go to Step 12.
(3)
If gasoline is not getting to the cylinder, go to Step 12.
Step 12. Check the crankcase vacuum. Use a vacuum gage.
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