22
STRATO CHARGED ENGINE
GZ25N
8. TROUBLE SHOOTING
8-3 Engine cannot be stopped
8-4 Lack of output power or unstable revolution
Description Cause
Countermeasure
Overheating
1.Lean fuel
Adjust carburetor
2.Cylinder fin clogged with dusts
Cleaning
3.Inproper fuel
Change with proper fuel
4.Carbon deposited inside of combustion Cleaning
chamber
5.Spark plug electrode red hot
Clean thoroughly and adjust
spark gap
[ 0.6-0.7mm (0.023-0.028in.) ]
Switch
1.Faulty switch
Exchange
2.Cable failure
Repair
Description Cause
Countermeasure
Compression is normal 1. Air penetration from fuel pipe joints, etc
Secure connection
2. Air penetration from intake tube joint
Change gasket or tightening
or carburetor joint
screws
3 Water in fuel
Change with good fuel
4. Piston start to seizure
Filing of seized surface with fine files
5. Muffler choked with carbon
Cleaning
6. Crack on lead air intake pipe
Exchange
7. Reed valve clogged with dusts or valve
Cleaning or exchange
tip opening is larger than specification
components
[ 0.2mm (0.008in.) ]
8. Reed valve stuck
Cleaning or exchange
Overheating
1. Fuel too lean
Adjust carburetor
2. Clogging of cylinder fin with dust
Cleaning
3. Poor fuel quality
Exchange with proper fuel
4. Carbon deposited in the combustion
Cleaning
chamber
5. Spark plug electrode red hot
Thoroughly clean, adjust spark
gap
[ 0.6-0.7mm (0.023-0.028in.) ]
Others
1. Dirty air cleaner
Wash with mixed gasoline
2. Over loading
Reduce load
and no misfire
Note : Hatched columns above are potential failures unique to the stratified scavenging engine.