3.5 Engine speed can’t increase or unstable (choke is at the correct position)
16
3.6 Engine speed too high or too low
Check the air filter element for blockage
Clear the air filter element
No blocked
Blocked
Check the valve clearance
Readjust the valve clearance
Abnormal
Normal
Remove the spark plug and check the
electrode clearance for carbon deposit
Clear electrode, adjust clearance
or replace the spark plug
Abnormal
Normal
Check the carburetor and nozzle fo
blockage
Disassemble and clear
Blocked
No blockage
Screw the nut, and replace the
papery gasket or heat insulation
block
Check sealing of inlet line papery gasket and
carburetor heat insulation block
Abnormal
Normal
1. Check the valve clearance
2. Check for carbon deposits
in combustion chamber
3. Check the piston, piston ring
and cylinder for damage
Measure the cylinder compression
Abnormal
Normal
Perform the throttle control system test
Perform the generator
troubleshooting following the
section onf “No or low AC output”
Abnormal
Check the AC output
Normal
Abnormal
Check the throttle control motor
Replace the throttle control motor
Normal
Replace the inverter unit
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