Thread:

Fuel Filter Water Seporator

Originally Posted by ICECREAMAN

I would mount it as low as reasonably possible so gravity can help feed the filter.

My last boat with a mech stock pump i mounted the filter about mid transom, just below the trim line for the top and bottom half. I never had one issue with it. Even if i ran out of fuel, just cranked it for a few moments and it would re prime with no issues. From my experience, try to keep the fuel lines equal length as possible so the tanks feed evenly. I always ran both tanks open at once.

I would run a 3/8 npt water sep

Originally Posted by krusn56

I would run a 3/8 npt water sep

mines 1/2" x 2 in and only using 1 of the 1/2" out. with -8 lines from the tanks. mounted high/mid transom to clear my TT exhaust with an electric fuel pump mounted down low on the stringer. not problemo's here. only time i had an issue was when i replaced the fuel filter dry. do yourself a favor when you FIRST put the filter in, pour some gas in there so your fuel pump doesnt have to suck for days to "prime" itself.

If its 3/8 npt = -8 or 1/2 line...I wouldnt reduce the line till after your pump.

3/8 line is okay but your fuel will get to the pump faster and more consistent pressure with larger line. I chased a fuel pressure issue with mine and changed out my 1/4 npt water/fuel sep to 3/8 npt and ran -8 1/2 fuel line from tank to mech 1/4 npt pump then -6 3/8 to carb. The 3/8 npt water sep states it will give about 15% more flow over 1/4 npt. 1/4 npt= 3/8 or -6
Stainless Steel OEM Replacement Filter and Mounting Head - CP Performance