60H5E11
9
Ye s
No
Ye s
No
Ye s
No
Ye s
No
Ye s
No
Symptom: Engine does not accelerate when the throttle is opened quickly.
The engine turns off when the throttle is opened quickly.
Hesitation or stumble is observed in the course of acceleration.
• Check the fuel system
• Check the ignition system
Fuel system
• Do not touch any of the connections of the
spark gap tester leads.
• Do not let sparks leak out of the removed spark
plug caps.
• Keep flammable gas or liquids away, since this
test can produce sparks.
Check that the fuel vent screw
of the fuel tank is open.
Is the vent
screw open?
Open the fuel vent screw.
Check the water accumulation
or clogging of the fuel filter.
Is there water
or residue?
Clean the fuel system from the
fuel tank to the fuel filter.
Check the fuel hose for kinks or
fuel leakage.
Is there any kinks
or fuel leakage?
Correct or replace the faulty
parts.
Check the fuel pump for leaks
from the valve by applying the
specified pressure to the pump.
Is there any
leakage?
Replace the fuel pump.
Check the carburetor operation.
Good operating
condition?
Adjust or replace the carburetor.
Check the ignition system.
Power unit
9-10
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