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  1. #1

    Default What's the ideal fuel line for under the cowl? Brand/type?

    I'm getting an older outboard into shape. Mercury 75HP made in '86. The brittle fuel lines I tore out yesterday were marked SAE 30R7.

    A website that sells fuel lines has this in the description: "30R7 is not Coast Guard approved for marine applications".

    Pep Boys carries a hose from CADNA in the size I need (50086) that says low pressure/high temp but nothing about marine applications.

    So what's best to run from the fitting to the fuel pump, then from the pump to the carbs?

  2. #2
    Join Date
    Sep 2008
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    Maryland - USA
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    Default Re: What's the ideal fuel line for under the cowl? Brand/type?

    "marine applications" is somewhat ambiguous.....30R7 rated hose doesn't comply with the "A1-15" requirements....that said, that hose is for inboard use (or with a permanently installed fuel tank)...

    If you run with ethanol blended fuels, get a hose that will handle it. I'd suggest a brand name hose vs a no-name type.

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