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  1. #1
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    Angry Exhaust Manifold Melted

    HI Guys,

    Need some input!
    Got up this morning to alter my Water Box like BDNJ did and after removing everything found the exit tip of the Exhaust manafold was MELTED or eaten away.
    What causes this?
    How do we stop it from happening again?

    All my engine mods are listed below!

    As you can see from the pictures attached their is no Aluminium fragments coming from inside the Engine, it seems to be small Aluminuim particled all melted together where the manafold joins the flex j-pipe.
    NOTE: We are exposed to salt water but we always clean & flush after every use and this ski has only 12hrs
    06 RXP
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  2. #2
    captain obvious Lurker's Avatar
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    We see this alot in modded skis. I guess the added heat melts the exaust outlet. You are not the first, and probably not the last.

  3. #3

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    I'm not sure if one of your items is a thru hull exhaust but that would really help. Also, take a picture of your engine compartment at several angles and post it here to see how close heat sources are to eachother. Your set up can change a little bit to keep very hot areas away from certain spots where possible.

  4. #4
    That`s the one area that`s not cooled by water...
    Man that looks bad...
    were you doing alot of WOT runs?...PR...

  5. #5
    EZ Dock of Long Island Shibby1485's Avatar
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    alot of us have had that already and we leave it, it's no problem... but urs is more than most have seen. now there's no lip on the manifold for the j-pipe and clamp to grip again... but it's not like it's gonna fall off if u get the clamp on there good bc the pipe won't slide off if ur thru-hull pipe and waterbox are rigid and secure and not bouncing all over.

  6. #6
    Moderator two2curupt's Avatar
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    that one looks wierd....Mine is more to one side...

  7. #7
    EZ Dock of Long Island Shibby1485's Avatar
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    yea it looks weird, but who am i kidding, that's not the lip that the clampgrips onto

    it'll be fine IMO, bolt it back up

  8. #8
    HOSS's Avatar
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    Salt water corrosion. Thats not from heat. And its a bad spot for electrolysis since these are 2 unlike metals connected. The j-pipe is made of poor quality stainless.

  9. #9
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    So whats the Answer?

  10. #10
    HOSS's Avatar
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    when it corrodes too much,,,buy a new one from the dealer.

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