2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 115Get this manual
I I.i) I FUELFuel system
Install the needle valvefloatfloat pin (j), and screw as shown, and then the check the float for smooth operation
S62Y4330
Throttle link rod length (6): 144 mm (5.67 in) NOTE: _ Place the needle valve in the valve seat when installing the float to the carburetor body Fit the float pin into the slit on the carburetor body and lock it with the screw