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When using an inline filter with rubber hose connections and hose clamps,

Fuel Filter, before or after mechanical pump?

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11K views 16 replies 14 participants last post by  1975TypeS-3  
#1 ·
This question came up in another thread. I've always done it one way and somebody told me I was doing it wrong. Pretend I'm from Missouri and show me.

later, dozer
 
#6 ·
Both.

Mike
 
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#8 ·
I have a Jeggs alum filter after the pump, 8 an fittings and braided SS lines to reg. mounted at carb., before engine swap I had the filter before pump and will prob. put another filter there and leave the one after, can 2 filters cause flow restrictions??
 
#9 ·
I don't mind a filter after the pump if it is hard plumbed in. Nice thing about a filter before the pump is it is not under pressure and it picks up stuff before going into the pump. What I don't like is rubber hoses and a bunch of clamps after the pump under pressure. It is not as safe and it doesn't look good. Personal choice. I have seen many problems with the rubber hose and clamps after the pump.
 
#14 ·
I’m a turkey, and run a strainer before pumping an a filter after pumping for fine particulate. In a perfect world I’d run 40 micron pre and

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#15 ·
Can't speak for the mechanical layout in an electric fuel pump, but I do a bit of aquarium work and their rule is to never have any more restrictions in front of the pump than are necessary but as many as you want after. Pumps don't work as well with input restrictions but fine with outlet restrictions.
FWIW
 
#16 ·
The oem way, with filter after the pump, coarse screen before.

And BTW, I've run a steel inline filter for twenty years w/o issue, whoever said the two 2" pieces of rubber on each side of the inline are "trouble". Oh sure I;d hardline it if I could find filters with compression ends cheap enough.