Trouble Recovery; Troubleshooting - Yamaha F350 Owner's Manual

Trouble Recovery

EMU46920
This section describes the likely causes and remedies for problems, such as those in the fuel, compression, and ignition sys-
tems, 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.
Trouble Starter will not operate.
Item
Digital electronic
Does the Digital electronic control-alert indicator come
control-alert indi-
on?
cator
Control lever
Is control lever in gear?
Is battery capacity low or weak?
Battery
Are battery connections corroded or loose?
Fuse Is fuse for starter relay or electric circuit blown?
Starter
Are starter components malfunctioning?
Trouble Engine will not start (starter operates).
Item
Engine shut-off
Is clip on engine shut-off cord (lanyard) installed?
cord (lanyard)
Fuel tank Is fuel tank empty?
Fuel Is fuel contaminated or stale?
Fuel filter Is fuel filter clogged?
Fuel pump Is fuel pump malfunctioning?
Spark plugs
Are spark plugs fouled or of incorrect type?
Ignition parts Are ignition parts malfunctioning?
Ignition wiring Is ignition wiring damaged or poorly connected?
Engine inner
Are engine inner parts damaged?
parts
Trouble Engine idles irregularly or stalls.
Item
Are spark plugs fouled or of incorrect type?
Spark plugs
Is spark plug gap incorrect?
Fuel system
Is fuel system clogged?
Fuel Is fuel contaminated or stale?
Fuel filter
Is fuel filter clogged?
Ignition parts
Are ignition parts malfunctioning?
Alert system Has alert system activated?
Ignition wiring
Is ignition wiring damaged or poorly connected?
Engine oil
Is specified engine oil not being used?
Thermostat
Is thermostat clogged or malfunctioning?
Fuel pump
Is fuel pump malfunctioning?
Fuel tank
Is fuel tank air vent restricted or clogged?
Fuel joint
Is fuel joint connection incorrect?
Battery
Is battery cable disconnected?
73

Troubleshooting

Question
Question
Question
Answer
Have serviced by a Yamaha dealer.
Shift to neutral.
Check battery condition. Use battery of recommended
capacity.
Tighten battery cables and clean battery terminals.
Check for cause of electric overload and repair. Replace
fuse with one of correct amperage.
Have serviced by a Yamaha dealer.
Answer
Install clip to engine shut-off switch.
Fill tank with clean, fresh fuel.
Fill tank with clean, fresh fuel.
Clean or replace fuel filter.
Have serviced by a Yamaha dealer.
Inspect spark plugs. Clean or replace with recommended
type.
Have serviced by a Yamaha dealer.
Inspect wires for breaks and wear. Have connections
tightened and broken or worn wires replaced by a
Yamaha dealer.
Have serviced by a Yamaha dealer.
Answer
Inspect spark plugs. Clean or replace with recommended
type.
Replace spark plug.
Inspect for pinched or kinked fuel line or other obstruc-
tions 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 broken 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.
Connect securely.