2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 114Get this manual
Carburetor 5Check the float for deteriorationReplace it necessary862Y4260
862Y4250
Prime Start plunger minimum length 24.6 mm (0.97 in)
Measure the float height Replace the float and needle valve, if out of specification, as set
Assembling the carburetor
Before assembling the carburetor, make sure to turn the pilot screw the same number of times, as noted before disassembly, from the seated position to the set positionInstall the main nozzle CD, plugpilot jetand main jet to the carburetor body as shown