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  1. #1
    boudin's Avatar
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    12f Cylinder Question

    Hi everyone. I bought a 30-hour 2005 12f yesterday for a good price. Took the motor apart this morning, and it looks like ski hydro-locked and broke #4 rod. There was quite a bit of water in the intake manifold air chamber. Top half of the case is trashed, and have already purchased another one.

    My question is about the cylinders. As you can see from the pics below part of the skirt is broken off, but it's about 1" below the lowest stroke of the rings. The rest of the cylinder is perfect and I can't feel any high-spots around the broken part.

    What do you think about reusing these cylinders?

    Thanks!
    -Greg

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  2. #2
    Take the time to smile sirbreaksalot's Avatar
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    thrash can buddy !!!!!!!!!!!

  3. #3
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Sorry Mr.Greg but those will tear the rings off when you try to install them. Langcourt llc will repair them but it will be around $450-600.

    Sean

  4. #4
    boudin's Avatar
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    Quote Originally Posted by smokeysevin View Post
    Sorry Mr.Greg but those will tear the rings off when you try to install them. Langcourt llc will repair them but it will be around $450-600.
    Thanks, Sean. I know it's hard to see in the photo, but it's very smooth around the broken area, and I think the piston/rings would go in fine and work with full compression. But long-term I think that heat and vibration will cause stress fractures in the thinner areas dropping metal fragments in the oil pan. I also think that lack of lubrication in that area could cause abnormal wear on the piston skirt leading to scoring and failure of the piston.

    I'll pick-up a used set.

    -Greg

  5. #5
    pete71's Avatar
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    I had my 15f cylinders sleeved a few years ago and it's still running strong

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  7. #6

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    Which company sleeved them?

  8. #7
    boudin's Avatar
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    Langcourt said they could repair and re-nik for about $500,which seems like a fair price. I bought a used set though for $400.

    Greg

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