2001-2002 Yamaha 50HP F50Z/T50Z Ouboard 4-stroke engines service manual, Page 104Get this manual
Fuel filter and fuel pump 2Push down on the plunger and the diaphragm, turn the fuel pump body CD approximately 90 to position where the pin can be removed easily, and then remove the pin2Push down on the plunger and the diaphragm, and then install the pin CD
3S62Y4100
Turn the fuel pump body approximately 90, and then push down on the plunger several times to make sure that the pin does not come outSlowly let up on the plunger and diaphragm, and then remove them4