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  1. #1
    S.O.B (single O/B) now Platinum Member t500hps's Avatar
    Join Date
    Sep 2004
    Richmond VA

    502 sounds like it has a mis

    Out running today, trying to keep up with Excursion and ended up idleing back to the dock. Starboard motor shut down and sounded pretty bad when we got it running. Pulled the plugs and 3rd one back on the right side didn't look to good. A couple of the guys with me today may have a better idea if this might be my only problem????
    Russ C.
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  2. #2
    Join Date
    Oct 2000
    Sussex, WI

    Re: 502 sounds like it has a mis

    When you say third one back, do you mean facing front or back, if its #6 and you have a mpi with a vst set up the diagraghm could be bad in the vst, or it could be a bad plug, plug wire, dist cap. Worst case scenario you burned a piston, check you your compression to find out. Need some more specifics.

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