Unfortunately that KE upgrade part just mounts on the original housing and uses the Mercury diaphram that fails. Too bad they don't make a complete replacement unit - KE resells the Mercury unit.

Anyone know of a shop for rebuilding/replacing the (Merc/Carter?) diaphram as I've got two in need now and another two by the end of the season no doubt? Thanks.

Duplicate post

i read somewhere that holley makes one also,,,http://www.jegs.com/webapp/wcs/store...pump+diaphramg maybe someone knows which one to buy,,,and which one works for the 525 mech. fuel pump,,, part #12-756 or 12-755

Here is another thread on the topic using the KE lower.

http://www.offshoreonly.com/forums/g...mendation.html

If I had a Mark IV this is the pump I would use, it's probably the most reliable pump you can get and will pump 450GPH.

http://www.cpperformance.com/p-13167...arbureted.aspx