Service manual

Cont’d
Trouble type Possible reason Recovery action
Propeller is damaged Repair or replace propeller
Trim angle is incorrect
Adjust trim angle to achieve most efficient
operation
Motor is mounted at incorrect transom
height
Adjust motor to proper transom height
Boat bottom is fouled with marine growth Clean boat bottom
Weeds or other foreign matter are tangled
on gear housing
Remove foreign matter and clean lower unit
Spark plug(s) are fouled or incorrect type
Inspect spark plug(s). Clean or replace with
recommended type
Fuel system is obstructed
Check for pinched or kinked fuel line or other
obstructions in fuel system
Fuel filter is clogged Replace with recommended type
Fuel is contaminated or stale Fill tank with clean, fresh fuel
Spark plug gap is incorrect Inspect and adjust as specified
Ignition wiring is damaged or poorly
connected
Check wires for wear or breaks. Tighten all
loose connections. Replace worn or broken
wires
Ignition parts have failed Replace
Specified engine oil is not being used or
oil is added too much
Check and replace oil as specified, or add
engine oil to specified position
Thermostat is faulty Replace
Fuel pump has malfunctioned Replace
Fuel joint connection is incorrect Connect correctly
Engine power loss
Specified spark plug(s) are not being used Check and replace spark plug(s) as specified
Propeller is damaged Repair or replace propeller
Propeller shaft is damaged Replace
Weeds or other foreign matter are tangled
on propeller
Remove and clean propeller
Motor mounting bolt is loose Tighten bolt
Steering pivot is loose Tighten steering pivot
Engine vibrates
excessively
Steering pivot is damaged Replace
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