Yamaha F80BETL Service Manual page 230

TRBL
SHTG
Symptom: Engine can be started, but does not remain on.
• Check the fuel system.
• Check the ignition system.
• Check the compression pressure of the power unit.
Fuel system
Check that the fuel vent screw of the fuel tank is open.
Is the vent
screw open?
Yes
Check for water or residue in
the fuel filter.
Water or
residue?
Yes
Clean the fuel system from the
fuel tank to the fuel filter.
Check the pressure regulator.
(4-14)
Good operating
condition?
Yes
Check the fuel system using the
Yamaha Diagnostic System.
9-9
Troubleshooting
No
Open the fuel vent screw.
No
Check the fuel hose for kinks or
fuel leakage.
Check the fuel pressure. (4-13)
No
Check the fuel system using the
Yamaha Diagnostic System.
No
Replace the pressure regulator.
Kinks or fuel
leakage?
No
Within
specification?
Yes Replace the
defective parts.
Check the fuel
Yes
injector resistance.
(8-10)
Yes
Within
specification?
No
Replace the fuel
injector.
6D93G11