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Engine Stops Working During Operation; Engine Has Difficulties To Stop - Husqvarna 525BX Workshop Manual

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8.2 Engine stops working during operation

Symptom/Category
There are no sparks at the spark plug
Engine suddenly
stops
Rotation gradually
decreases and the
engine stops
Rotation suddenly
increases, and then
the engine stops

8.3 Engine has difficulties to stop

Symptom/Category
Engine suddenly
stops
Switch
64
- English
Cause
1. The switch has been touched, stopping
the engine
2. The switch is OFF and not return ON
automatically
3. The plug cap has come off
4. The switch cable or high-voltage cable
trunking is worn
5. Internal fault in the coil
6. The engine has burned out
7. The breather air vent is blocked
1. Lack of fuel
2. Blockage inside the carburetor
3. There is water in the fuel
1. Lack of fuel
2. The breather air vent is blocked
3. Blockage inside the carburetor
Cause
1. Fuel is lean
2. Blockage due to dirt in the air passage for
cooling
3. Blockage due to dirt on the cylinder fin
4. Poor quality fuel is being used
5. Carbon has collected in the combustion
chamber (run-on occurs)
6. The spark plug tip is red hot electrode
1. Faulty switch
2. Cable is broken
3. Internal fault in the ignition module
Troubleshooting
Action
Restart
Replace
Fit it back on fully
Replace
Replace
Overhaul and replace
damaged parts
Clean
Fill with fuel
Clean
Discharge and clean the inside
of the tank, then fill with proper
quality fuel
Fill with fuel
Clean
Clean
Action
Adjust, repair or replace the
carburetor
Clean
Clean
Change with proper quality fuel
Clean
BPMR8Y:
Adjust to 0.65 mm
Replace
Replace
Replace

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