Parsun F40 EFI, Maintenance Manual

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Fault type Fault cause Solution
The engine
is weak.
The spark plug is contaminated or
the model is incorrect
Clean it or replace with the correct spark
plug
Fuel system blocked
Check the fuel line for extrusion,
entanglement or blockage
Fuel filter blocked Replace the fuel filter
Fuel oil polluted or obsoleted Fill the fuel tank with clean new fuel
Incorrect spark plug gap Adjust the gap to the specified value
Ignition circuit failure
Check the wiring. Tighten the loose wire
and replace the old or broken wire.
Ignition component failure Replace it
Incorrect engine oil grade or
excessive oil
Change to the specified oil grade or add it to
the proper position of the oil dipstick
Thermostat failure Replace it
Fuel pump fault Replace it
The fuel joint is not connected
correctly
Connect it correctly
Incorrect spark plug specification Replace it with the correct model
Excessive
vibration of
outboard
motor
Propeller damaged Repair or replace the propeller
Propeller shaft damaged Replace it
Propeller twined by aquatic plants
or foreign matters
Remove the foreign matters and clean it
Mounting bolts of outboard motor
loosened
Tighten the bolts
Steering shaft loosened Tighten the shaft
Steering shaft damaged Replace