1990 v-200 Merc fuel pump diaphragm/gasket... to the inside or outside of the pump?

danamul1977

Petty Officer 2nd Class
Joined
Nov 15, 2012
Messages
148
Im not sure if the diaphragm goes to the inside of the pump and then the gasket on both sides or the other way around. I had a problem with the motor bogging down at 2800rpm's and im sure the last time I rebuilt the fuel pump I did it wrong. I had one diaphragm facing the inside of the pump and the other side gasket then diaphragm facing the inside and thats just not right. I have a few photos here showing what im talking about. If anyone knows which one I should use, that would be a great help. I do not have a serial # because the one on the motor is wrong, idk why.
 

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