Trouble Recovery
62
EMU47860
Troubleshooting
This section describes the likely causes and remedies for problems, such as those in the fuel, compression, and ignition systems,
poor starting, and loss of power. Please note that all of the items in this section may not apply to your model.
If your outboard motor requires repair, bring it to a Yamaha dealer.
If the engine trouble-alert indicator is blinking, consult your Yamaha dealer.
If a warning message appears on the CL7 Display, follow the instructions on the display.
Trouble
Starter will not operate.
Item
Question
Answer
Digital electronic
control-alert indi-
cator
Does the digital electronic control-alert indicator come
on?
Have serviced by a Yamaha dealer.
Control lever
Is control lever in gear?
Shift to neutral.
Battery
Is battery capacity low or weak?
Check battery condition. Use battery of recommended
capacity.
Are battery connections corroded or loose?
Tighten battery cables and clean battery terminals.
Fuse
Is fuse for starter relay or electric circuit blown?
Check for cause of electric overload and repair. Replace
fuse with one of correct amperage.
Starter
Are starter components malfunctioning?
Have serviced by a Yamaha dealer.
Trouble
Engine will not start (starter operates).
Item
Question
Answer
Engine shut-off
cord (lanyard)
Is clip on engine shut-off cord (lanyard) installed?
Install clip to engine shut-off switch.
Fuel tank
Is fuel tank empty?
Fill tank with clean, fresh fuel.
Fuel
Is fuel contaminated or stale?
Fill tank with clean, fresh fuel.
Fuel filter
Is fuel filter clogged?
Clean or replace fuel filter.
Fuel pump
Is fuel pump malfunctioning?
Have serviced by a Yamaha dealer.
Spark plugs
Are spark plugs fouled or of incorrect type?
Inspect spark plugs. Clean or replace with recommend-
ed type.
Ignition parts
Are ignition parts malfunctioning?
Have serviced by a Yamaha dealer.
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.
Engine inner
parts
Are engine inner parts damaged?
Have serviced by a Yamaha dealer.
Trouble
Engine idles irregularly or stalls.
Item
Question
Answer
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.
Fuel system
Is fuel system clogged?
Inspect for pinched or kinked fuel line or other obstruc-
tions in fuel system.
Fuel
Is fuel contaminated or stale?
Fill tank with clean, fresh fuel.
Fuel filter
Is fuel filter clogged?
Clean or replace fuel filter.
Ignition parts
Are ignition parts malfunctioning?
Have serviced by a Yamaha dealer.
Alert system
Has alert system activated?
Find and correct cause of alert.
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.
Engine oil
Is specified engine oil not being used?
Inspect engine oil and replace with specified type.
Thermostat
Is thermostat clogged or malfunctioning?
Have serviced by a Yamaha dealer.
Fuel pump
Is fuel pump malfunctioning?
Have serviced by a Yamaha dealer.
Fuel tank
Is fuel tank air vent restricted or clogged?
Remove obstruction.
Fuel joint
Is fuel joint connection incorrect?
Connect correctly.
Battery
Is battery cable disconnected?
Connect securely.
U6GR30E0.book Page 62 Thursday, April 12, 2018 9:28 AM
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2019 Yamaha Motor Corporation, U.S.A.