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Trouble Recovery
Trouble
Item
Spark plugs
Fuel system
Fuel
Fuel filter
Ignition parts
Alert system
Ignition wiring
Engine oil
Thermostat
Fuel pump
Fuel tank
Fuel joint
Air vent screw
Battery
Outboard motor
mounting
Throttle valve
Trouble
Item
Cooling system
Low oil pressure-
alert
Spark plugs
Engine oil
Oil filter
Oil pump
Thermostat
92
Engine idles irregularly or stalls.
Question
Are spark plugs fouled or of incorrect
type?
Is spark plug gap incorrect?
Is fuel system clogged?
Is fuel contaminated or stale?
Is fuel filter clogged?
Are ignition parts malfunctioning?
Has alert system activated?
Is ignition wiring damaged or poorly
connected?
Is specified engine oil not being
used?
Is thermostat clogged or malfunction-
ing?
Is fuel pump malfunctioning?
Is fuel tank air vent restricted or
clogged?
Is fuel joint connection incorrect?
Is air vent screw on fuel tank closed?
Is battery cable disconnected?
Is motor angle too high?
Is throttle valve adjustment incorrect?
Alert buzzer sounds or indicator lights.
Question
Is cooling system clogged?
Is low oil pressure-alert indicator on
or blinking?
Is heat range of spark plugs incor-
rect?
Is specified engine oil not being
used?
Is engine oil contaminated or deterio-
rated?
Is oil filter clogged?
Is oil pump malfunctioning?
Is thermostat malfunctioning?
Answer
Inspect spark plugs. Clean or replace
with recommended type.
Replace spark plug.
Inspect for pinched or kinked fuel line
or other obstructions in fuel system.
Fill tank with clean, fresh fuel.
Clean or replace fuel filter.
Have serviced by a Yamaha dealer.
Find and correct cause of alert.
Inspect wires for breaks and wear.
Have connections tightened and bro-
ken or worn wires replaced by a
Yamaha dealer.
Inspect engine oil and replace with
specified type.
Have serviced by a Yamaha dealer.
Have serviced by a Yamaha dealer.
Remove obstruction.
Connect correctly.
Open air vent screw.
Connect securely.
Return to normal operating position.
Have serviced by a Yamaha dealer.
Answer
Inspect cooling water inlet for obstruc-
tions.
Have serviced by a Yamaha dealer.
Inspect spark plugs and replace with
recommended type.
Inspect engine oil and replace with
specified type.
Replace engine oil with specified
type.
Have serviced by a Yamaha dealer.
Have serviced by a Yamaha dealer.
Have serviced by a Yamaha dealer.
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