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  1. #1

    SLT 780 Driveshaft/Engine alignment tool source, must I do the alignment?

    Hello everyone,

    I am new to the forum but have been lurking and using the amazing resources as we replace the engine in our 96 SLT 780.

    We are to the point of installing the SBT replacement engine but I am interested in hearing everyone’s thoughts on the alignment process. The engine is a direct replacement, and we are using the same base plates and motor mounts (along with driveshaft and everything else). SBT tech said a tool isn’t an absolute necessity. But I have searched the forum with most results saying a tool is needed.


    But therein lies the problem. I can’t find a tool for this, and none of the shops in my area (Kansas City) work on them. Does anyone have a lead on a tool I can buy or rent if you feel it’s a necessity? Thanks in advance!


  2. #2

    Join Date
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    ALWAYS check alignment. Generally, if you keep the shims in the same spots and you don't remove the mounting bracket from the engine you will be ok. However, any misalignment will cause the coupler to wear out quickly.

    There is one guy that makes an alignment tool that I am aware of on eBay. Shipping will take some time.
    https://www.ebay.com/itm/20-MM-Steel...c/121655978407

    The specifications for the alignment tool are listed here:
    http://greenhulk.net/forums/showthre...=1#post2458536

    You can probably get a local machine shop to whip one up for you.
    Last edited by bfarnam; 08-04-2020 at 04:31 PM. Reason: Fixed eBay link

  3. #3
    Quote Originally Posted by bfarnam View Post
    ALWAYS check alignment. Generally, if you keep the shims in the same spots and you don't remove the mounting bracket from the engine you will be ok. However, any misalignment will cause the coupler to wear out quickly.

    There is one guy that makes an alignment tool that I am aware of on eBay. Shipping will take some time.
    https://www.ebay.com/itm/20-MM-Steel-Rod-Alignment-Shaft-SPECIAL-Ground-Polished-36-long-1-Pc/121655978407

    The specifications for the alignment tool are listed here:
    http://greenhulk.net/forums/showthre...=1#post2458536

    You can probably get a local machine shop to whip one up for you.
    Thank you very much for the reply.

    I was able to dig those recommendations up using the search function. But given their age I didn’t know if there were any other options. However, I have a question regarding just using the steel rod ; The videos I have watched show a base plate that attaches to where the jet holes are in the hull. How do you ensure the rod is completely straight and will line up if you have no way of holding it in that particular spot?

  4. #4
    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
    Join Date
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    You remove the impeller and stub shaft from the jet pump. The alignment tool then slips into it's place.

    It's not a perfect system, but it gets you really close.

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