Trouble Recovery; Troubleshooting - Yamaha F400A Owner's Manual

Trouble Recovery

EMU48434
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.
Trouble
Item
DEC alert indica-
tor
Control lever
Battery
Fuse
Starter
Trouble
Item
Engine shut-off
cord (lanyard)
Fuel tank
Fuel
Fuel filter
Fuel pump
Spark plugs
Ignition parts
Ignition wiring
Engine inner parts
88

Troubleshooting

Starter will not operate.
Question
Does the DEC alert indicator come on
in orange?
Is control lever in gear?
Is battery capacity low or weak?
Are battery connections corroded or
loose?
Is fuse for starter relay or electric cir-
cuit blown?
Are starter components malfunction-
ing?
Engine will not start (starter operates).
Question
Is clip on engine shut-off cord (lan-
yard) installed?
Is fuel tank empty?
Is fuel contaminated or stale?
Is fuel filter clogged?
Is fuel pump malfunctioning?
Are spark plugs fouled or of incorrect
type?
Are ignition parts malfunctioning?
Is ignition wiring damaged or poorly
connected?
Are engine inner parts damaged?
Answer
Have serviced by a Yamaha dealer.
Shift to neutral.
Check battery condition. Use battery
of recommended capacity.
Tighten battery cables and clean bat-
tery 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 bro-
ken or worn wires replaced by a
Yamaha dealer.
Have serviced by a Yamaha dealer.