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  1. #1
    chartersj's Avatar
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    96 slt 780 jet pump repair

    good day, a guy brought me a 1996 slt 780 that has pump issues. I would say it started out with the pump seals failing, then the bearings, and kept driving it untill the whole guts of the pump dissapeared, and continued to use it untill the impeller beat around in the pump long enough to wear the impeller blades down enough so it couldnt possibly move in the water anymore. When i pulled the pump the impeller and drive shaft stayed in the ski lol. Anyways wondering what year/model pumps interchange with this ski, i am assuming there is no point trying to rebuild this one. The part number on the impeller says its a polaris 5131371 as well, is this size impeller only used in the slt780 or other models as well? thanks!


  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    See the Jet Pump section from my signature links. You can use any 1994-2004 modular 148mm jet pump from any Polaris model. The jet pump parts are generally interchangeable with some exceptions.

    The impeller part number is matched to the engine power.

  3. #3
    chartersj's Avatar
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    Ok thanks! Do all pumps 1994+ have the long bolts?

  4. #4
    Click avatar for tech links/info, donation request K447's Avatar
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    Quote Originally Posted by chartersj View Post
    Ok thanks! Do all pumps 1994+ have the long bolts?
    All the modular jet pumps use the long bolts but there are several lengths of bolts. Pumps with the 4 inch wear ring extension have much longer bolts than the shorter pumps without the extension.

    There are also small differences in bolt length depending on the pump wedge (the tapered piece that sits directly behind the stator and in from of the bolted on exit nozzle).

    When taking a jet pump apart it is a good idea to check whether two of the bolts are slightly longer than the other two. Normally if two of these 'long bolts' are slightly longer those slightly longer bolts go into the bottom two bolt holes where the pump wedge is thickest.

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