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  1. #1
    mellow's Avatar
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    1994 SLT 750 Project

    Well I finally got around to taking a look at the $75.00 SLT 750 I picked up last week, not going to be the quick fix I had hoped for. Jet drive is locked up, guessing bad bearings, and the engine is locked up, guessing the rings are rusted? I have been soaking them in diesel fuel over the weekend and trying to smack on them with a wooden board and getting no where.

    It doesn't look like the ski was submerged but I find it odd that both the jet drive and the engine are locked up solid. From the looks of the pistons is this looking like a total engine rebuild?


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  2. #2
    Click avatar for tech links/info, donation request K447's Avatar
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    Have you removed the jet drive and drive shaft?

    Was this a salt water machine?

    Might as well pull the engine. Perhaps the Bendix is jammed, although it seems more likely the crankshaft or pistons are the seizure point.

  3. #3
    mellow's Avatar
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    Yea, jet drive was pulled first to see if that was the culprit, and it was locked up as well, if you see the shaft still on in that photo it was because I was trying to use it to see if I could get the rings to break free, I didn't put much force on it as I didn't want to mess it up and switched to the wood board on the pistons trick.

    I am guessing it was salt water, it originally came from Annapolis which it would have seen Bay use but has been sitting since I am guessing 2003 since that was the last dated sticker on it. It has been sitting in the back of a guys property for at least 4 years since he had acquired it to fix it and did nothing to it once he couldn't get it to start. How it died I do not know.

    What is all the crud sitting on top of the one piston? When I pulled the head that was sitting on top of it.

  4. #4
    mellow's Avatar
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    Also I was thinking this weekend, if I pull the engine and work on this over the winter, has anyone fashioned up a cross brace on the engine mounts so they do not move over the winter? I was thinking I could cut up some angle iron and drill holes for the engine mounts to go through so it would keep it in the same spot so no need to worry about alignment?

  5. #5
    Click avatar for tech links/info, donation request K447's Avatar
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    I doubt you could create a brace which would exactly match the forces and tensions of the mounted engine. I have not heard of others doing such a thing.

    This thing has been sitting for so long, who know how the hull may have been re shaped over time. Do not assume what you have now is aligned. It might be, or might not.

    Alignment tools can be had, or loaned. Especially over a long winter, I suspect you can source one if need be.

  6. #6
    mellow's Avatar
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    Any idea what I am looking at for a rebuild? Say the one piston is bad and I need it bored or two for that matter and then replace the crank case seal/bearing. I was thinking it would be in the $400 range, is that close if the crankshaft is good?

  7. #7
    sorry to bother you, but how can i post a question on her? i am trying to figure out how to ask a few questions regaurding my 1994 and 93 skis that i have been working on, but i cant figure out how to use this site..? please help!!!

    Quote Originally Posted by mellow View Post
    Well I finally got around to taking a look at the $75.00 SLT 750 I picked up last week, not going to be the quick fix I had hoped for. Jet drive is locked up, guessing bad bearings, and the engine is locked up, guessing the rings are rusted? I have been soaking them in diesel fuel over the weekend and trying to smack on them with a wooden board and getting no where.


    It doesn't look like the ski was submerged but I find it odd that both the jet drive and the engine are locked up solid. From the looks of the pistons is this looking like a total engine rebuild?


    Click image for larger version. 

Name:	WP_20130903_001.jpg 
Views:	61 
Size:	119.9 KB 
ID:	313087Click image for larger version. 

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Views:	68 
Size:	116.5 KB 
ID:	313086Click image for larger version. 

Name:	WP_20130907_002.jpg 
Views:	65 
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ID:	313085

  8. #8
    mellow's Avatar
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    Try clicking this and see if it works: http://www.greenhulk.net/forums/newt...ewthread&f=104

  9. #9
    mellow's Avatar
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    What is the part # for this o ring? I can't find it on the microfiche, only the round o-ring.

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  10. #10
    Click avatar for tech links/info, donation request K447's Avatar
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    That may not be an o-ring.

    Looks like the impeller nose seal. Polaris used two different seals between driveshaft and impeller. Some impellers use a thick o-ring, others (NuJet) use a tapered rubber molded piece.

    Or is that just an old o-ring crushed alongside another o-ring?
    Last edited by K447; 09-13-2013 at 02:11 PM.

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