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a) To increase the drive speed, turn the adjuster
screw counterclockwise.
Problem
The engine does not start.
The engine does not stop.
The engine does not operate
smoothly.
The engine becomes too hot.
There is misfire in the engine
when it operates at high speed.
The engine does not operate
smoothly at idle speed.
12
Troubleshooting
Possible cause
The throttle control is not in cor-
rect position.
The ignition cable is not connec-
ted correctly.
The fuel tank is empty.
There is dirt in the carburetor or
fuel line.
The spark plug is defective.
There is too much fuel in the en-
gine.
The stop mechanism is defective. Disconnect the ignition cable from the spark
The throttle control is not in cor-
rect position.
The ignition cable is not connec-
ted correctly.
There is dirt in the fuel line or the
fuel has expired.
There is blockage in the fuel tank
cap.
There is water or dirt in the fuel
system.
The air filter is dirty.
The carburetor must be adjusted. Let a servicing dealer adjust the carburetor.
The engine oil level is too low.
The air flow is not sufficient.
The carburetor must be adjusted. Adjust the carburetor.
The electrode gap in the spark
plug is too small.
The spark plug is dirty, defective
or the electrode gap is too wide.
The carburetor must be adjusted. Adjust the carburetor.
The air filter is dirty.
b) To decrease the drive speed, turn the adjustment
screw clockwise.
Solution
Move the throttle control to fast position or
start position.
Connect the ignition cable to the spark plug.
Fill the fuel tank with correct fuel type.
Clean the carburetor and/or fuel line.
Adjust the electrode gap, clean or replace
the spark plug.
Start the engine with the throttle control in
the fast position.
plug. Let an approved service agent repair
the product.
Move the throttle control to fast position.
Connect the ignition cable to the spark plug.
Clean the fuel line. Fill the fuel tank with new
fuel of the correct type.
Clean the fuel tank cap.
Drain the fuel tank. Fill the fuel tank with new
fuel of the correct type.
Clean the air filter.
Fill engine oil.
Clean the air filter and the air filter housing.
Adjust the electrode gap.
Adjust the electrode gap or replace the spark
plug.
Clean the air filter.
928 - 001 - 17.12.2018
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