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c. Oil supply system
malfunction
1. Insufficient oil of gasoline pump
Repair or replace
2. Gasoline hose and gasoline filter plug
Clean
d. Reduced cylinder
compressed
pressure
1. Broken cylinder gasket
Replace
2. Improper adjustment of throttle valve
clearance or damaged
Adjust, repair or replace
3. Worn piston, piston ring and cylinder
Repair or replace