Re: 1936 J-80 Johnson water pump plunger

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January 17, 2016 at 2:10 am #30230
Anonymous

    Its a simple inverted piston, make a new one, use some solid brass round stock, drill the centre out

    What is the overall length of the piston? Diameter? I can probably carve one out in 10 minutes….

    Wear like that indicates either lack of lube in lower unit, or mega-hours of service….

    More common issue with those pumps is sticky check valves, but that’s easy to fix too

    Best,
    T2