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Common faults and solutions
Fault type Fault cause Solution
Engine fails to
start
There is no fuel in the fuel tank
Fill the fuel tank with clean new fuel
Contaminated or obsolete fuel oil
Fuel filter blocked Replace the fuel filter
Fuel pump failure Overhaul or replace it
Vent screw of fuel tank cap not
loosened
Loosen the vent screw
The spark plug is contaminated or
the model is incorrect
Check the spark plug. Clean it or replace with the
correct spark plug
Incorrect installation of spark plug
cap
Check and reinstall the spark plug cap
Ignition circuit failure
Check the wiring. Tighten the loose wire and replace
the old or broken wire.
Ignition component failure Replace it
The engine stop safety line is not
connected to the emergency stop
switch assembly.
Connect the line to the switch
Internal parts failure of the
engine
Repair it
Engine idle is
abnormal or
stalls
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 oil polluted or obsoleted Fill the fuel tank with clean new fuel
Fuel filter blocked Replace the fuel filter
Incorrect spark plug gap Adjust the gap to the specified value
Ignition circuit failure
Check the wiring. Tighten the loose wire and replace
the aging or broken wire.
Incorrect engine oil grade Change it to the specified oil grade
Thermostat failure Replace it
Fuel pump failure Replace it
Vent screw of fuel tank cap not
loosened
Loosen the vent screw
The fuel joint is not connected
correctly
Connect it correctly
The angle of the outboard motor is
too high
Return it to its normal running position
The engine is
weak.
Propeller damaged Repair or replace the propeller
Incorrect trim angle Adjust the trim angle to the appropriate angle
Incorrect installation height of
outboard motor
Adjust it to the correct height
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