Trouble Recovery
63
Trouble
Alert buzzer sounds or indicator lights.
Item
Question
Answer
Cooling system
Is cooling system clogged?
Inspect cooling water inlet for obstructions.
Low oil pressure-
alert
Is low oil pressure-alert indicator on or blinking?
Have serviced by a Yamaha dealer.
Spark plugs
Is heat range of spark plugs incorrect?
Inspect spark plugs and replace with recommended
type.
Engine oil
Is specified engine oil not being used?
Inspect engine oil and replace with specified type.
Is engine oil contaminated or deteriorated?
Replace engine oil with specified type.
Oil filter
Is oil filter clogged?
Have serviced by a Yamaha dealer.
Oil pump
Is oil pump malfunctioning?
Have serviced by a Yamaha dealer.
Thermostat
Is thermostat malfunctioning?
Have serviced by a Yamaha dealer.
Water pump
Is water pump malfunctioning?
Have serviced by a Yamaha dealer.
Fuel filter
Is there excess water in fuel filter?
Drain fuel filter.
Trouble
Engine power loss.
Item
Question
Answer
Propeller
Is propeller damaged?
Have propeller repaired or replaced.
Is propeller pitch or diameter incorrect?
Install correct propeller to operate outboard motor at its
recommended speed (r/min) range.
Mounting height
Is outboard motor mounted at incorrect height on tran-
som?
Have outboard motor adjusted to proper transom height.
Alert system
Has alert system activated?
Find and correct cause of alert.
Boat bottom
Is boat bottom fouled with marine growth?
Clean boat bottom.
Spark plugs
Are spark plugs fouled or of incorrect type?
Inspect spark plugs. Clean or replace with recommend-
ed type.
Is spark plug gap incorrect?
Replace spark plug.
Is heat range of spark plugs incorrect?
Inspect spark plugs and replace with recommended
type.
Lower unit
Are weeds or other foreign material tangled on gear
housing?
Remove foreign material and clean lower unit.
Fuel system
Is fuel system clogged?
Inspect for pinched or kinked fuel line or other obstruc-
tions in fuel system.
Fuel filter
Is fuel filter clogged?
Clean or replace fuel filter.
Fuel
Is fuel contaminated or stale?
Fill tank with clean, fresh fuel.
Is specified fuel not being used?
Replace fuel with specified type.
Ignition wiring
Is ignition wiring damaged or poorly connected?
Inspect wires for breaks and wear. Have connections
tightened and broken or worn wires replaced by a
Yamaha dealer.
Electrical parts
Are electrical parts malfunctioning?
Have serviced by a Yamaha dealer.
Engine oil
Is specified engine oil not being used?
Replace engine oil with specified type.
Thermostat
Is thermostat clogged or malfunctioning?
Have serviced by a Yamaha dealer.
Fuel tank
Is fuel tank air vent restricted or clogged?
Remove obstruction.
Fuel pump
Is fuel pump malfunctioning?
Have serviced by a Yamaha dealer.
Fuel joint
Is fuel joint connection incorrect?
Connect correctly.
Control lever
Is engine not responding properly to control lever posi-
tion?
Have serviced by a Yamaha dealer.
Trouble
Engine vibrates excessively.
Item
Question
Answer
Propeller
Is propeller damaged?
Have propeller repaired or replaced.
Are weeds or other foreign material tangled on propeller?
Remove and clean propeller.
Propeller shaft
Is propeller shaft damaged?
Have serviced by a Yamaha dealer.
Outboard motor
mounting
Are outboard motor mounting bolts loose?
Tighten bolts or have serviced by a Yamaha dealer.
Steering pivot
Is steering pivot loose or damaged?
Have serviced by a Yamaha dealer.
U6GR30E0.book Page 63 Thursday, April 12, 2018 9:28 AM
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2019 Yamaha Motor Corporation, U.S.A.