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CAUTION: Make sure that no dirt
goes into the air duct (E).
4. Install the air filter. Make sure that the air filter fully
seals against the air filter holder.
5. Install the air filter cover with the bottom tabs first.
To examine the spark plug
CAUTION: Always use the
recommended spark plug type. Incorrect
spark plug type can cause damage to the
product.
• Examine the spark plug if the engine is low on
power, is not easy to start or does not operate
correctly at idle speed.
• To decrease the risk of unwanted material on the
spark plug electrodes, obey these instructions:
a) Make sure that the idle speed is correctly
adjusted.
b) Make sure that the fuel mixture is correct.
c) Make sure that the air filter is clean.
• If the spark plug is dirty, clean it and make sure that
the electrode gap is correct, refer to
Technical data
on page 15
.
• Replace the spark plug if it is necessary.
To examine the fuel system
• Examine the fuel tank cap and the seal for the fuel
tank cap to make sure that there are no damages.
• Examine the fuel hose to make sure that there are
no leaks. If the fuel hose is damaged, let a service
agent replace it.
To adjust the clutch wire (LC 419SP)
If the drive feels slow, it is necessary to adjust the clutch
wire.
• Turn the adjuster screw.
a) To increase the drive speed, turn the adjuster
screw counterclockwise.
b) To decrease the drive speed, turn the adjustment
screw clockwise.
Troubleshooting
Problem Possible cause Solution
The engine does not start. The ignition cable is not connected cor-
rectly.
Connect the ignition cable to the spark
plug.
The fuel tank is empty. Fill the fuel tank with correct fuel type.
The fuel is old. Drain the fuel tank and the carburetor.
Refuel with new gasoline.
There is dirt in the carburetor or fuel line. Clean the carburetor and/or fuel line.
The spark plug is defective. Adjust the electrode gap, clean or re-
place the spark plug.
There is fuel on the spark plug. Clean the spark plug.
The engine does not stop. The stop mechanism is defective. Disconnect the ignition cable from the
spark plug. Let an approved service
agent repair the product.
1434 - 001 - 13
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