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Thread: Rubber fuel line sizes

  1. #1

    Rubber fuel line sizes

    Getting ready to order all new rubber fuel lines for my 69S. I’m not sure my measurements are correct. Can anyone tell me what the different sizes are?
    1. Fuel filter to injection pump, supply, and return line.
    2. Fuel filter to cold start on air box.
    3. Electric fuel pump to tank.
    4. Electric fuel pump to supply & return lines

    My measurements show
    1.=9mm
    2.=5mm
    3.=10mm
    4.=8mm
    TIA, Mike
    1969 911S
    1969 Datsun 2000...worth less, but more valuable

  2. #2
    Senior Member
    Join Date
    Oct 2010
    Location
    Southern Ca.
    Posts
    1,166
    Porsche used a smaller size hose than the fitting for a tight fit .
    !. 7 or 7.5 mm
    2. 4 or 4.5 mm
    3. 9 mm
    4. 7 mm

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