2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 344Get 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