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Results 1 to 7 of 7
  1. #1

    Default 1980s 50hp mercury pump question

    Need some help answering kind simple a question

    Will the water pump operate when the engine is only used with throttle only (ie gear is disengaged)
    or does it have to be in neutral or in gear to operate

  2. #2
    Join Date
    Sep 2010
    Posts
    18,482

    Default Re: 1980s 50hp mercury pump question

    When the motor turns / runs the water pump should be working !!-----The shifting is done along the propeller shaft.----The pump is driven by the driveshaft.----Why the question ?

  3. #3

    Default Re: 1980s 50hp mercury pump question

    Being having problems with the pump on muffs, changed it, ran compressed air throw the telltale, it seemed to be clear. When I run it on muff nothing and when its in the lake it pumps great.

  4. #4
    Join Date
    Sep 2010
    Posts
    18,482

    Default Re: 1980s 50hp mercury pump question

    Some motors are shy and do not pee well with neighbors watching.

  5. #5

    Default Re: 1980s 50hp mercury pump question

    lol

    Just worried about overheating it as I want to give it decent run before the lake

  6. #6
    Join Date
    Sep 2010
    Posts
    18,482

    Default Re: 1980s 50hp mercury pump question

    There is not really much that you can do wrong with one of these pump repairs.----That is my opinion.-----If you are worried you need to install a water pressure gauge.----Any boat shop will be glad to help you pick one out suited for your motor !

  7. #7
    Join Date
    Sep 2003
    Location
    New Tripoli, PA, USA!
    Posts
    16,537

    Default Re: 1980s 50hp mercury pump question

    If you're running it in a small barrel or on muffs, it can be starved for water and run hotter. If you run the boat on the trailer at the ramp you can be assured it's okay or not.

    This is also a great way to determine if the motor is "taking gas" correctly and making ful power. Just don't hold her wide open for more than a few seconds.

    Jeff

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