Gas/water separator filter

prc03sx195 · May 16, 2025

How often should I be changing the filter. It has 48 hrs on it. Three yrs old. Am I good to leave it go? This is on a 4.3 v6 mercruiser. Thanks

Bondo · May 16, 2025

Ayuh,.... I change mine once a year when I do the end of season service, or if I have a runability issue,.....

Lou C · May 16, 2025

And also dump the gas into a mason jar, this allows you to get a sense of what's in your fuel, and if your fuel tank might need cleaning, or is getting water in it

prc03sx195 · May 16, 2025

Are the WIX or napa gold fuel filters comparable or better than the mercruiser brand?

Bondo · May 16, 2025

prc03sx195 said:
Are the WIX or napa gold fuel filters comparable or better than the mercruiser brand?

yes

KD4UPL · May 16, 2025

I change mine every year with a NAPA. I do it in the fall when I winterize. If there is water in there I don't want it freezing.

ratdude747 · May 16, 2025

I do mine every year, although that means I've done it twice since I haven't had it (or any boat) all that long. Original (as I received the boat) was a badly rusted noname (boat sat for 12 years, but had a water intrusion incident 2 years prior to sitting; the filter was changed by the sketchy marina that had caused said incident). Last year I ran a Sierra (did fine); this year a Quicksilver (since the price was cheaper than sierra oddly enough), and the next two years will be Fram (since I found a couple of them at an outlet store for virtually free and the quality looks decent, about the same as the sierra and the Quicksilver).

Scott Danforth · May 17, 2025

Every 50 hours or once a year. Which ever occurs first

So if you are only getting 16 hours a year, you change them with your annual service

redneck joe · May 17, 2025

Definitely dump into a pickle jar to see if you are getting water intrusion regardless of how often you change. Can even do with fresh fuel from wherever you fuel up. That will tell you where, if any, water is coming from.

I got stupid and installed my tank vent upside down. Don't be stupid, don't be joe....

Scott Danforth · May 17, 2025

redneck joe said:
I got stupid and installed my tank vent upside down. Don't be stupid, don't be joe....

Ha Ha

Sounds like when I splashed I had the steering rack installed backwards..... Right was left .. made for interesting first splash

redneck joe · May 17, 2025

Scott Danforth said:
Ha Ha

Sounds like when I splashed I had the steering rack installed backwards..... Right was left .. made for interesting first splash

Trying to not go off topic but did the same on the 36 footer we bought about 16 years back. Sat for 12 years unused so I chose to redo and luckily had several folks at the dock sending us off that w could throw ropes to ...

To the OP, are you getting water or just a maintenance question?

Gas/water separator filter

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