Water Separator or Fuel filter?

[2.5-21]

What is mercury recommending be used between tank and motor?
Old spin on separator or a newer style sealed filter like mercruiser uses?

[2.5-21]

Or Nothing?

[Jay Smith]

Try a 33093 Wix forget the high $$ Mercury filter , I have used them for 20 years , you will need to buy an adapter to adapt high pressure female to fuel barb but after you buy it once keep changing it out with purchase of $8.00 WIX ....

Jay

[BUZZIN' DOZEN]

Wix 33482 has barbs on each end and I would run a fuel/water separator before pump and the wix after

[2.5-21]

Use a water Separator and filter or just filter?

[Bodhi]

You could get away with just the water separator as it will act as a fuel filter as well. I prefer just to have a fuel filter between the tank and my engines on all of my , they change out easy and still catch any water and debris

[Brad Zastrow]

Water separator first, then the inline high micron filter for the EFI like mercury sells.

[Davidlake]

I use Racor marine water separator/filters on my outboard 300 SX Skater. Mercury has conflicting recommendations about pre-filters on these motors. I did some additional research and found that Mercury does endorse pre-filters like the high flow Racor's for the 300SX's as optional rigging. They are the 660R models - 10 micron and 90 GPM. No chance of starving the frugal 300SX!

http://www.parker.com/literature/Rac...ers_-_7702.pdf

[2.5-21]

I have a problem with using 5/16" fuel line they are worried about filter flow?

[activator22]

I know this has been posted prev, always a good read - from Joe and Marty at Diamond Marine

www.diamondmarine.com/web_pages/Fuel%20System.htm

[ghost28]

just put a decent 10 micron water separator in line, use 3/8" line and thats that...Every 250xs, 300xs 300X 300PM 250EFI i have rigged which are hundreds of them has had that set up and always been flawless...But running without a 10 micron water sep filter is asking for trouble especially with the **** fuel we have today...Had a customer with a brand new boat and the builder said NO WATER SEPARATOR...well i can tell you within 40 hrs the filter in the VST was clogged to **** and the motor wasnt running right....

[2.5-21]

Mercury Racing generated a service bulletin for the ProMax series motors prohibiting the use of hull mounted water separators.

[Tom Foley]

I've been using both a water separator and the Wix filter on 3 different 260s for 13 years and almost 500 hours with good results . FWIW .

[2.5-21]

I have always used one but know it is a highly debated issue, Debate has begun!

[ghost28]

Mercury issued that bulletin like 20 years ago...lol...alot has changed...you run what you like but when **** gets in an opti fuel system it aint cheap to fix...