Operators Manual

English - 67
8.4 Insufficient output or unstable rotation
Symptom/Category Cause Action
Compression is
good and there is no
flame out
1. Air has entered through the fuel pipe joint,
etc.
Insert it securely
2. Air has entered the fuel pipe due to a
crack or pin hole
Replace
3. Air has entered through the insulator pulse
pipe insertion part, etc.
Insert it securely
4. Air has entered through the insulator and
carburetor installa- tion part
Replace or tighten the gasket
5. Air has entered through the oil seal, etc. Replace
6. There is water in the fuel Discharge and clean the inside
of the tank, then fill with good
quality fuel
7. The piston appears to have been burned Remove the burn with a fine
file, or replace
8. Carbon blockage in the muffler Clean
Excessive heat
1. Fuel is thin Repair or replace the carbu-
retor
2. Blockage due to dirt in the air passage for
cooling
Clean
3. Blockage due to dirt on the cylinder fin,
etc.
Clean
4. Poor quality fuel is being used Replace with good quality fuel
5. Carbon has built up in the combustion
chamber
Clean
6. The spark plug tip is red hot
Clean carefully, and BPMR8Y:
Adjust to 0.65 mm
Other
1. The air cleaner is soiled
Replace it with a new one
2. Excessive load Reduce the load
Troubleshooting