I want to repalce my mechanical sea water pump mounted fuel pump because it is leaking into the fluid.

I have read many threads and it seems that some change pumps for this and others dont. Some say it happens with every pump and just change the fluid often.

I still dont know what to do but are there aftermarket pumps that will work to replace? Do they all leak into the fluid?

It's a pretty easy fix 20 bucks in seals from local shop,

I read you later threads so it's fuel not water going into oil, I'm sure rebuilding diaphragm will fix problem

No pump should ever be leaking any fuel!!! Can't believe anyone would say to just change that oil often. That's crazy.

Where do you get the rebuild kit, I am all for that?

The diaphragm is attached to the actuator. I have not found any way to get them apart in a manner that can then be reassembled reliably. I have a new pump with less than 50 hours on it and I get fuel in the oil after each season. It's not much, just enough to smell it when you change the oil. I use Amsoil 75w90 extreme gear lube that seems to take the dilution well. Cam and pump arm show no signs of wear.