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Old 07-03-2019, 12:11 PM   #1
forestb
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Fule filter location

I have a 350 with a mechanical fuel pump. I am planning on replacing my fuel filter. The filter is currently between the pump and the carburetor. Is that a good location or should it go in between the tank and the pump? Or should I have 2 one before the pump and a finer filter after the pump?
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Old 07-03-2019, 12:26 PM   #2
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Re: Fule filter location

There is a fuel sock in the tank. This should cover most stuff before the pump. You could add another to be sure there is nothing getting through.
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Old 07-03-2019, 12:31 PM   #3
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Re: Fule filter location

I have a fuel cell. I don't believe it has a sock.
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Old 07-03-2019, 01:57 PM   #4
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Re: Fule filter location

I put one in after the tank. I'm considering a post pump unit but havnt yet.
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Old 07-03-2019, 11:34 PM   #5
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Re: Fule filter location

When possible I run 2 fuel filters. One between the tank and pump and another between the pump and carb.
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Old 07-05-2019, 01:27 AM   #6
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Re: Fule filter location

should the second filter be the same fineness (microns) as the first and what fineness (microns) should they be?
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Old 07-05-2019, 06:22 AM   #7
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Re: Fule filter location

40 or less.
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Old 07-06-2019, 09:28 PM   #8
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Re: Fule filter location

I was watching HotRod garage and they were saying you should put a 100 micron filter before the pump and a 10 micron filter after, but that was for a electric fuel pump. Should I do that with a mechanical pump?
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Old 07-06-2019, 09:34 PM   #9
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Re: Fule filter location

Were they installing a Carb or FI? I guess the cleaner the better.
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Old 07-06-2019, 10:26 PM   #10
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Re: Fule filter location

Now that you mentioned it I do think it was fuel injected. I didn’t see your previous post before I posted that. Just to clarify. You recommend that I put one before and one after that are the same microns both below 40?
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Old 07-07-2019, 08:49 AM   #11
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Re: Fule filter location

CapnFab said that, I said I was considering it. I mean 25 micron your getting down to white blood cell size so 40 micron being the lower limit of visibility of a human eye I would think a carb would be good with that.
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Old 07-07-2019, 04:47 PM   #12
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Re: Fule filter location

Sorry about getting the posts mixed up. Thanks for the help
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Old 07-10-2019, 10:39 AM   #13
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Re: Fule filter location

Quote:
Originally Posted by Captainfab View Post
When possible I run 2 fuel filters. One between the tank and pump and another between the pump and carb.
Same for me...2 filters
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Old 07-10-2019, 11:28 AM   #14
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Re: Fule filter location

Quote:
Originally Posted by verdell View Post
Same for me...2 filters
what size micron filter before and after?

I just ordered a 40 micron Russell filter for after the fuel pump. What should I run before?
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Old 07-10-2019, 03:49 PM   #15
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Re: Fule filter location

100 Micron will work, you don't want a too restrictive filter prior to the pump. They also make them in screen type that you can clean instead of replace.
100 Mesh Screen - 149 Micron = Table salt
200 Mesh Screen - 74 Micron = Silt
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Last edited by The Rocknrod; 07-10-2019 at 03:56 PM.
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Old 07-10-2019, 03:58 PM   #16
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Re: Fule filter location

thanks
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Old 07-11-2019, 09:00 AM   #17
The Rocknrod
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Re: Fule filter location

You could use a 6AN filter like the Summit Filters SUM-230130.
Then use a 3/8" Tube x 3/8" AN/JIC Flare Female Connector. It's a dual ferrule unit like a Swagelock (Titan sells them for 8 or 9 bucks) to place the filter inline after the pump.
Smaller footprint, less fittings and will not leak at the tube ends.
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Old 07-11-2019, 11:21 AM   #18
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Re: Fule filter location

I am currently running AN-6 braided hose line from the pump to the carb and already have a filter that is in line with that line. All I have to do is unscrew the old one and screw in the new one. I was just trying to figure out if it should be before the pump or have both. I thing for right now I am going to just replace that filter and maybe update to a 100 micron filter before the pump in the future.
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Old 07-11-2019, 12:01 PM   #19
The Rocknrod
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Re: Fule filter location

Ah I see, ya that'll make it easier. Mine is all hard lines on the engine. I have a pre pump filter presently but am planning a post pump before I start it.
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