Insufficient Output Or Unstable Rotation - Husqvarna 525L Workshop Manual

Troubleshooting

8.4 Insufficient output or unstable rotation

Symptom/Category
Compression is
good and there is no
flame out
Excessive heat
Other
Cause
1. Air has entered through the fuel pipe joint,
etc.
2. Air has entered the fuel pipe due to a
crack or pin hole
3. Air has entered through the insulator pulse
pipe insertion part, etc.
4. Air has entered through the insulator and
carburetor installa- tion part
5. Air has entered through the oil seal, etc.
6. There is water in the fuel
7. The piston appears to have been burned
8. Carbon blockage in the muffler
1. Fuel is thin
2. Blockage due to dirt in the air passage for
cooling
3. Blockage due to dirt on the cylinder fin,
etc.
4. Poor quality fuel is being used
5. Carbon has built up in the combustion
chamber
6. The spark plug tip is red hot
1. The air cleaner is soiled
2. Excessive load
Action
Insert it securely
Replace
Insert it securely
Replace or tighten the gasket
Replace
Discharge and clean the inside
of the tank, then fill with good
quality fuel
Remove the burn with a fine
file, or replace
Clean
Repair or replace the carbu-
retor
Clean
Clean
Replace with good quality fuel
Clean
Clean carefully, and BPMR8Y:
Adjust to 0.65 mm
Replace it with a new one
Reduce the load
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