SBT Jetski Engines, Parts & Accessories

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  1. #1
    Joined
    Jun 2004
    From
    Arkansas
    Posts
    96

    Default 94 Sea Doo XP Rebuilding Engine

    Hi. I am rebuilding an engine on a 94 XP 650. I had the cylinders bored to match the new pistons. However, the old pistons had broken off into small pieces in some areas. I am concerned that fragments could be inside the engine.

    What is the best way to flush these potential fragments out of the system before I reassembled the top end?

    Just want to make sure this thing runs good as I plan to keep it.

    Thanks,
    Joshua Cole
    In this life if you are in search of happiness it will surely elude you, if you focus on the needs of others, family, and God happiness will find you.

  2. #2
    Joined
    Jan 2005
    Posts
    34

    Default Re: 94 Sea Doo XP Rebuilding Engine

    Better took out the crankshaft to check it out & the RV parts all you need to check,mine was same case last 3 month.Check the oil seal of crankshaft too.

  3. #3
    Joined
    Feb 2004
    From
    New Jersey
    Posts
    2,601

    Default Re: 94 Sea Doo XP Rebuilding Engine

    the only way to inspect and be 100% sure is to pull the engine apart compleatly
    PRIDE IN SERVICE<br /> <img src="http://www.sbtontheweb.com/images/forposts/4609/1.jpg" alt=" - " />

  4. #4
    Joined
    Jun 2004
    From
    Arkansas
    Posts
    96

    Default Re: 94 Sea Doo XP Rebuilding Engine

    Thank-you to all. Stripped it down and all is well now. Reassembled and it looks good.

    The head has some pits in it from the previous pistons coming apart. Do I take it to a machine shop and have it machined? Buy new one? Sand down rough areas?

    Thanks,
    Joshua Cole
    In this life if you are in search of happiness it will surely elude you, if you focus on the needs of others, family, and God happiness will find you.

  5. #5
    Joined
    Jul 2004
    From
    Ft Worth Tx
    Posts
    1,095

    Default Re: 94 Sea Doo XP Rebuilding Engine

    take it to a machine shop and have them clean it up or buy another one

  6. #6
    Joined
    May 2004
    Posts
    158

    Default Re: 94 Sea Doo XP Rebuilding Engine

    if not bad then sand it down.. so any little craters are not protruding..
    taking it to get machined will and may alter compression..
    a little rough and then fine sanding should be ok.... as long as its not excessive..
    the dome does not need to be smooth to run good.. all it does is contain the combustable gases

  7. #7
    Joined
    Jun 2004
    From
    Arkansas
    Posts
    96

    Default Re: 94 Sea Doo XP Rebuilding Engine

    The head has what I feel are a couple of deep pits. I hand sanded it down slightly but those areas are still inset. I have purchased another one via eBay that is in good shape. I will take some detailed pictures of mine and sell it on eBay.

    Joshua Cole
    In this life if you are in search of happiness it will surely elude you, if you focus on the needs of others, family, and God happiness will find you.

  8. #8
    Joined
    Jun 2004
    From
    Arkansas
    Posts
    96

    Default Re: 94 Sea Doo XP Rebuilding Engine

    Hi. I pulled this thread from the archives as following the top end rebuild I had an issue. Riding the ski, yes wide open after only a tank of gas, I jumped a wave. When I came down the ski died. It later started and ran fine although we did not ride it anymore. I brought it home to check out. I then decided I would pull the head to paint the outside. Upon doing so I noticed the following impact on the front piston.

    Issue: Piston is severally pitted as you can see in pics. The rear is fine. What caused this to take place? In order to fix do I need a new head? Amazingly the cylinder walls are fine. Can I just get another piston to .5 match and replace only the front or do I have to have both cylinders bored/matched to the new pistons?

    Please input.

    Joshua Cole
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    In this life if you are in search of happiness it will surely elude you, if you focus on the needs of others, family, and God happiness will find you.

  9. #9
    Joined
    Dec 2004
    From
    windsor ontario
    Posts
    62

    Default Re: 94 Sea Doo XP Rebuilding Engine

    if you need a head email me at flamed94xp@yahoo.com i have two a brand new stock head and a westcoast head with two sets of domes.

  10. #10
    Joined
    Jun 2004
    From
    Arkansas
    Posts
    96

    Default Re: 94 Sea Doo XP Rebuilding Engine

    Inputs? See pictures above.

    Josh
    In this life if you are in search of happiness it will surely elude you, if you focus on the needs of others, family, and God happiness will find you.

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