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Clogged fuel
tank vent hole
Clean
Insufficient
engine power
Correct compression ratio and
ignition
Filter clogged
Wash
Fuel mixed
with water
Change fuel
Engine
overheated
Turn off and
cool down
Dirt in the
muffler
Clean
Engine overheats
Bad fuel
consistency
Adjust the
carburetor
Carbon
deposit on the
cylinder cover
Clean
Wrong oil in
the mixture
Use the
correct oil
Air line
disconnected
Connect
Uneven noise
Bad fuel
Replace
Carbon
deposit in the
combustion
chamber
Clean
Worn or
damaged
moving parts
Check and
replace
The engine
cuts out during
operation
The engine suddenly cuts out
Loose spark
plug wire
Connect
Damaged
piston
Replace
Spark plug
contacts
shorted or
dirty
Clean or
replace
Consumption
of all fuel
Refill
The engine stalls slowly
Dirt inside the
carburetor
Clean
Blocked air
line in the fuel
tank
Clean