2005 Yamaha F90TR 90HP Outboards Factory Service Manual, Page 224Get this manual
TRBL SHTG
Troubleshooting
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 unitFuel 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
Open the fuel vent screw
Water or residue? Yes
Check the fuel hose for kinks or fuel leakage
Clean the fuel system from the fuel tank to the fuel filter