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12. Troubleshooting Guide

Case 1. Starting failure

WARNING

Make sure the icing prevention system is not

working.

Check fuel for water or substandard mix- ture.

Check for engine

flooding.

Replacefuel. with proper

Remove and dry the spark plug.

Then pull the starter again with no choke.

Check the spark.

Replace with a new plug.

Case 2. Lack of power/Poor acceleration/ Rough

idling

Check fuel for water or substandard mix- ture.

Replacefuel. with proper

Check air filter and

fuel filter for clogging.

Check muffler and

cylinder (exhaust port).

Clean.

Wipe away carbon buildup.

Case 3. Oil does not come out

Check oil for sub- standard quality.

Check oil passage and ports for clog- ging.

Replace.

Clean.

When your unit seems to need further service, please consult with our service shop in your area.

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Zenoah GZ400 Troubleshooting Guide, Case 2. Lack of power/Poor acceleration/ Rough Idling, Case 3. Oil does not come out