f. Engine speed can’t increase or instable (choke is at the correct position)
Check the air filter element for blockage
Blocked
Clear the air filter element
No blocked
Check the valve clearance
Readjust the valve clearance
Abnormal
Normal
Remove the spark plug and check the
electrode clearance for carbon deposit
Check the carburetor and nozzle for
blockage
Check sealing of inlet line papery gasket and
carburetor heat insulation block
Screw the nut, and replace the
papery gasket or heat insulation
block
Normal
Abnormal
1. Check the valve clearance
2. Check the carbon deposit in
combustion chamber
3. Check the piston, piston ring
and cylinder for damage
Measure the cylinder compression
Abnormal
No blockage
Blocked
Disassemble and clear
Abnormal
Clear electrode, adjust clearance
or replace the spark plug
Normal
Normal
Perform the throttle control system test
g. Throttle control system test
1. Engine speed too high or too low
Perform the generator
troubleshooting following the
instruction of “No or low AC output”
Check the AC output
Abnormal
Normal
Replace the throttle control motor
Check the throttle control motor
Abnormal
Normal
Replace the inverter unit
15
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