fuel line sizes
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fuel line sizes

  1. #1
    Senior Member holorinhal's Avatar
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    Default fuel line sizes

    I am in the process of putting together the fuel line system with stainless braided line and AN fittings. I need to know if there is a specific size line that should be use for the fuel lines ,especially from the tanks to the fuel filter, from the fuel filter to the fuel pump and from fuel pump to the carbs?

    The tanks had a 1/4 npt elbow with a push on hose barb with rubber fuel line to the "T". At the bottom of the "T" there is a -10 AN fitting withe -10 stainless line the rest of the way.
    The only fitting I could find for the tank with a 1/4 npt was with a -6 AN flare. The -6 line from the tanks just seem to be too small? ....Hal

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    Quote Originally Posted by holorinhal View Post
    I am in the process of putting together the fuel line system with stainless braided line and AN fittings. I need to know if there is a specific size line that should be use for the fuel lines ,especially from the tanks to the fuel filter, from the fuel filter to the fuel pump and from fuel pump to the carbs?

    The tanks had a 1/4 npt elbow with a push on hose barb with rubber fuel line to the "T". At the bottom of the "T" there is a -10 AN fitting withe -10 stainless line the rest of the way.
    The only fitting I could find for the tank with a 1/4 npt was with a -6 AN flare. The -6 line from the tanks just seem to be too small? ....Hal
    i personally run 5/8" USCG approved line from the bottom of my tanks to a T & 5/8" line from the T to the mech pump...3/8" ss braided line from mech pump to fuel log or y-block to carb/carbs...i also run a filter in each line comming from the tank to the T & another after the T to the pump...i have never had any fuel issues...just my .02 cents

    FastRat

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    Hal, give us some detail. What size and HP of engine? Electric or mechanical? One carb, Two or? Thanks Scott

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    1/2 pipe to #8 from each tank bottom rear to "y" into #12 to pump. never any issues.

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    Senior Member BrotherWolf's Avatar
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    Im also doing the same thing with my boat and it seems Jegs has tons of diffrent fittings here is a chart i found a few days back

    http://www.performanceboats.com/html...fuel+line+size

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    Senior Member holorinhal's Avatar
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    Quote Originally Posted by super junk View Post
    Hal, give us some detail. What size and HP of engine? Electric or mechanical? One carb, Two or? Thanks Scott
    The pick up tube and bung on the tanks are 1/2" ID. engine hp is around 750,Pump is 140 gph mechanical, feeds two carbs. ...Hal

    I'm not here for a long time, I'm just here for a good time!
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    Senior Member Futs's Avatar
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    I ran -8 from the tanks to the T. then -10to the fuel filter and then to the pump. -10 from the pump to the regulator and -6 to both bowls on both carbs.

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    Living in a cage of fear thatguy's Avatar
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    Quote Originally Posted by Futs View Post
    I ran -8 from the tanks to the T. then -10to the fuel filter and then to the pump. -10 from the pump to the regulator and -6 to both bowls on both carbs.
    X2, on the Miller. (about 600 HP)

    10AN from single tank on the Hydro to filter > pump> reg. Then 6AN to all 4 bowl inlets. (Maybe 700+ HP?)
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