Engine Troubleshooting - Husqvarna LB 144 Operator's Manual

Lamp indicator on the bat-
tery charger
Constant green light
To examine the spark plug
CAUTION:
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:
Problem
The engine does not start.
The engine does not stop.
The engine does not operate
smoothly.
2172 - 003 - 24.08.2023
Status
The battery is fully charg-
ed.
Always use the

Engine troubleshooting

Possible cause
The ignition cable is not connected cor-
rectly.
The fuel tank is empty.
The fuel is old.
There is dirt in the carburetor or fuel line. Clean the carburetor and/or fuel line.
The spark plug is damaged.
There is fuel on the spark plug.
The stop mechanism does not operate
correctly.
The ignition cable is not connected cor-
rectly.
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.
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
on page 17 . (Fig. 38)
• 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.
Solution
Connect the ignition cable to the spark
plug.
Fill the fuel tank with correct fuel type.
Drain the fuel tank and the carburetor.
Refuel with new gasoline.
Adjust the electrode gap, clean or re-
place the spark plug.
Clean the spark plug.
Disconnect the ignition cable from the
spark plug. Let an approved service
agent repair the product.
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.
Let a servicing dealer adjust the carbu-
retor.
Technical data
15