How Much Exhaust Port Damage is Too Much?

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  1. #1
    PWCToday Newbie
    Join Date
    Jul 2017
    Madison, Ohio

    How Much Exhaust Port Damage is Too Much?

    The front cylinder of my JS550, which I've made a few posts about now, has a pretty significant amount of metal missing above and below the exhaust port.
    I don't know if this picture shows what I'm talking about well enough. I can take another if needed. What problems would I run into if I tried to run that cylinder? I don't know how long the previous owner ran it like that.
    1987 JS550 - Torn down 100% for rebuild!
    1982 JS550 - In the process of tearing down.

    Looking for a couple JS550 copper head gaskets.

  2. #2 Is My Home Away From Home Grumpy Old Guy's Avatar
    Join Date
    Dec 2003
    Sunny Fla

    Re: How Much Exhaust Port Damage is Too Much?

    You need a new/used cyl.

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