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  1. #1
    Pwgsx's Avatar
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    Exhaust overheating

    This is on a 155hp engine. The waterbox seems to have bubbled the paint and the plastic thread cover on the clamp for the J pipe is melted. According to the CanDoo the exhaust high temp was 208F, engine temp 203F. The other engine was only 177 exhaust and 195 engine. I know the cooling goes to the manifold and the J pipe. Does anyone have any pics on what holes on the J pipe to drill out and what other areas to check. I cant find much info.
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  2. #2

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    Pull the J pipe out and look at the end that goes in the water box. Look at the end where you have the top hose clamp in picture #2, there are 3 small holes there, I drilled mine out about 2 sizes larger

  3. #3
    Pwgsx's Avatar
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    Ok thanks, I will do that on both. However I think the blockage must be at the manifold or before as well. Is the manifold easy to remove, I see a few star screws, is that it? Should I be aware of any gaskets that can damage or need to order new? Thanks man!

  4. #4
    AtoMIC_OraNGE greenbullet's Avatar
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    drill out the pissers on the pipe it will help

  5. #5

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    The manifold is easy to remove (just can't see the bolts), 2 water lines at the J pipe and one toward the front under the manifold have to come off. You'll want an E8 socket, other sockets will work but the correct one is an E8. You don't want to strip the head on those manifold bolts. I can tell you if you do, it ain't fun. As they say here "ask me how I know".

  6. #6
    wotxxxsd's Avatar
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    She got pretty hot..

    I'd replace the exhaust sensor just as a precaution.

    It's shelf life has been severely shortened..

  7. #7
    Pwgsx's Avatar
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    Is there a gasket between the mani and engine? Do I need to use a gasket maker on the re-install? I wish I knew when it happened, this is a new boat to me and I would assume it was from the p/o. I was also told it was never used in salt and I couldn't find any rust BUT after trouble shooting stuff, the shaft under the boot is rusted and cables and bolts that are not seen unless your really looking for them are corroded.

  8. #8
    RXPJAY's Avatar
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    No gasket between exhaust mani and engine. Real easy. just a little PITA cause theres not much room to work.

  9. #9
    Check you jet pump for cracks...this can cause overheating.


  10. #10
    It was hard to see but the alignment of the cooling tube and the hull was compromised. You can run your finger along and use a bright flashlight. Good luck

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