3W 78B2 Manuale - Pagina 14

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Trouble Shooting

Problem

The engine is flooded (the crankshaft housing is filled with fuel).

Solution

Remove the spark plug; turn the engine to a position where the fuel runs out.

The engine starts after being choked but then stops soon after.

The low needle on the carburetor is probably too lean. Go back to the recommended settings

and adjust your carburetor from there. This problem may also indicate a dirty carburetor or

faulty ignition.

The engine runs rough and is vibrating strongly.

Balance the propeller. Check the ignition timing. Check your plumbing for air/fuel leaks.

Check your spark plug for carbon and check the spark plug gap. Check the motor mount to

be sure it is rigid. Check to make sure the engine is mounted on a level surface so that the

crankcase is free of tension. Check the engine and propeller bolts.

The engine doesn't reach a normal RPM at full throttle.

Check the carburetor settings. Check to see if the propeller is too large. Verify that you have

the correct muffler system. Check to see if the engine is overheating. Check the ignition

timing. Check the spark plug for defect. Verify you have the correct gasoline, oil, and have

mixed them with the correct ratio.

3W 85i Engine Manual

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