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  1. #1
    Cadet
    Join Date
    Mar 2012
    Posts
    1

    Default 15 hp 74 Johnson Fuel Pump question

    I have an issue with my motor starting. I have tried many of the previously mentioned tips. But,one question remains. Is it possible to have the intake and outlet hoses located incorrectly, mine are (1 on 1 side and 1 on the other). The reason I ask, is on photos if similar engines on U tube both lines are on the same side going to respective receptacles. Just wondering???

  2. #2
    Master Chief Petty Officer
    Join Date
    Mar 2010
    Location
    Poland/Białystok
    Posts
    829

    Default Re: 15 hp 74 Johnson Fuel Pump question

    bigger one goes to inlet, fuel pump cap(filter cup)
    smaller one from outlet fuel pump goes to carb inlet,

    i would be concerned about slow spped nidle/circuit.
    should be set up on 1.5 turn out.
    some carbs need more than 1.5 out but if something is dirty in carb.

    check spark,
    check compresion,
    be sure that fuel goes to carb

  3. #3
    Chief Petty Officer
    Join Date
    May 2002
    Location
    SW Washington State
    Posts
    576

    Default Re: 15 hp 74 Johnson Fuel Pump question

    On those fuel pumps, the outer cover which has a strainer under it can be rotated to accomodate where the other things are located like a electric start rectifier or terminal block which is very close to the fuel pump. The cover is usually located to best eliminate sharp bends in the supply/outlet lines.
    Author of LeeRoy's Ramblings

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