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  1. #1

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    Can this head be salvaged?

    Is this head pretty much trashed? Can it be repaired? The center pistion was trashed and the debris was pushed onto the head. Thanks for your help.



  2. #2
    Moderator RX951's Avatar
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    Make sure you find the root cause of the problem that caused the damage.
    • Loss of lubrication
    • Carb issue [lean]
    • Crank bearing failure

    check your oil injection lines at the carbs.

    Are the carbs stock never been touched?
    How did the plugs look?

    As long as the cylinder head gasket sealing surface is smooth, the indentations in the head dome are mostly cosmetic.

    Do you have a closer up view of that #2?

    I also have a 1200 head if you choose to replace.

  3. #3
    vomitspot's Avatar
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    i have new oem and aftermarket fs

  4. #4

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    Quote Originally Posted by RX951 View Post
    Make sure you find the root cause of the problem that caused the damage.
    • Loss of lubrication
    • Carb issue [lean]
    • Crank bearing failure
    check your oil injection lines at the carbs.

    Are the carbs stock never been touched?
    How did the plugs look?

    As long as the cylinder head gasket sealing surface is smooth, the indentations in the head dome are mostly cosmetic.

    Do you have a closer up view of that #2?

    I also have a 1200 head if you choose to replace.
    The head gasket sealing surface is smooth.
    I assumed that I would have to replace the crank. The end of the rod where the pistion bearing sits is a little rough and that bearing failed. I am not sure if that caused the overall failure. The engine was previously rebuilt, but after 3 hours of run time it blew up again. I guess they could have missed / ignored the bearing problem. The oil injection lines were all connected. All three plugs were black. The carbs were stock and I do intend to rebuild all 3 carbs. I will also pressure test the engine when I get it back together. I also intend to go premix as well.

    I am attaching a closer up view of the head for your review. If you think it is ok to use it, I will. Thanks for your help


  5. #5
    Moderator RX951's Avatar
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    That head looks ugly, but just cosmetic.

    Now....if the engine has been rebuilt before and the carbs were not rebuilt, and looking at the color of that head, I would say there is a fuel issue as well.

    I would take the time to dissasemble the carbs and thoroughly go thru them. We have how-to's on the site to show you, forum members to assist you and we have carb guru's to offer services.

    again, I strongly suggest a crank inspection with possible R&R, and total carb rebuild. The carbs need to have the t-handles installed also so adjustments can be made

  6. #6

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    Quote Originally Posted by RX951 View Post
    That head looks ugly, but just cosmetic.

    Now....if the engine has been rebuilt before and the carbs were not rebuilt, and looking at the color of that head, I would say there is a fuel issue as well.

    I would take the time to dissasemble the carbs and thoroughly go thru them. We have how-to's on the site to show you, forum members to assist you and we have carb guru's to offer services.

    again, I strongly suggest a crank inspection with possible R&R, and total carb rebuild. The carbs need to have the t-handles installed also so adjustments can be made
    Thanks a lot! I will do exactly as you said.

  7. #7
    My Jet Ski drinks more than yours Glenozzy's Avatar
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    use a wire brush on the head and clean it up, then repost pic's

  8. #8
    Moderator RX951's Avatar
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    Also, what does that cylinder and piston look like?

    ...again, I have a 1200 head if you are interested.

    when you take those carbs apart, let us know the condition, post pics....I'm curious to see how dirty/plugged the internal filters are.

  9. #9
    WATER WOODY's Avatar
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    I would find the problem as stated by RX951,then get another head.If you have ANY high spots in the head,they will get red hot and create more problems.Like a sharp point etc....the thin peaks can get super hot.You can get a stock 1200 head pretty cheap.
    Last edited by WATER WOODY; 09-11-2008 at 01:32 PM.

  10. #10
    JKR1300's Avatar
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    If you go to higher compression on that head most of the damage would probably clean up.

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