2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 125Get this manual
Troubleshooting Symptom: Engine can be started, but does not remain on Check the fuel system Check the ignition system Check the compression pressure of power unit
Check that the fuel vent screw of the fuel tank is open
Is the vent screw open?
Open the fuel vent screw
Check for water or residue in the fuel filter
Water or residue?