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  1. #1
    Join Date
    Mar 2013
    Location
    Madison, AL
    Posts
    83

    Question Impeller leaking in the rear

    Has anyone replaced their rear seal on the Johnson raw water pump on an Indmar? Mine is leaking and getting the belt wet at times and causing it to squeal for a moment.

    I think this is the part I need to order:
    http://www.bakesonline.com/detail.aspx?ID=1665

    But, I may order IMPELLER KIT (LONG) SERVICE kit while I am going to the trouble and replace everything:
    http://store.inboardonline.com/iwwid..._tree?cat=2350

    Anyone have any suggestions or instructions on this work?

    Thanks
    2005 Moomba Mobius LSV
    ACME 1433 prop (newest upgrade)
    1900lbs Surf side

  2. #2
    Join Date
    Jun 2007
    Location
    Vancouver, WA
    Posts
    4,026

    Default

    Just replaced my impeller and thermostat 4 days ago.

    Purchased through skidim.com. I emailed them asking "is this what I need"? and had a response within a half hour. Order placed, done. Their impeller included the gasket - looks like the one you are looking at is separate but price is comparable in the end.

    The gasket for the plate covering the impeller is a pretty soft foam so it really compresses and being brass the bolts don't tighten down too incredibly tight. I could see it getting a tear pretty easily. I was actually surprised how loose mine was when I put a wrench to it.
    Old enough to know better, young enough to do it anyway.

    2001 MobiusV

  3. #3
    Join Date
    Mar 2013
    Location
    Madison, AL
    Posts
    83

    Default

    Quote Originally Posted by bergermaister View Post
    Just replaced my impeller and thermostat 4 days ago.

    Purchased through skidim.com. I emailed them asking "is this what I need"? and had a response within a half hour. Order placed, done. Their impeller included the gasket - looks like the one you are looking at is separate but price is comparable in the end.

    The gasket for the plate covering the impeller is a pretty soft foam so it really compresses and being brass the bolts don't tighten down too incredibly tight. I could see it getting a tear pretty easily. I was actually surprised how loose mine was when I put a wrench to it.
    I am talking about the rear seal, not the seal on the front cover plate. Mine is leaking in the back of the water pump not at front where the impeller is installed
    2005 Moomba Mobius LSV
    ACME 1433 prop (newest upgrade)
    1900lbs Surf side

  4. #4
    Join Date
    Jun 2012
    Location
    Portland Oregon
    Posts
    803

    Default Impeller leaking in the rear

    That's a great deal for the entire pump!



    Mine looked like that so I replaced it, however it's a simple rebuild if your spindle is in good shape.
    -Jake

  5. #5
    Join Date
    Mar 2013
    Location
    Madison, AL
    Posts
    83

    Default

    I just ordered a new Johnson Water pump. After researching online it seems impossible to replace the back seal without the proper tools/press.
    2005 Moomba Mobius LSV
    ACME 1433 prop (newest upgrade)
    1900lbs Surf side

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