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4.3 MerCruiser

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  • July 15, 2020 at 12:12 am #961030
    Conrad HutchingsConrad Hutchings
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      Hello there I have a 4.3 MerCruiser in my boat I was having problems with my distributor I replaced it hooked up a timing light to it and the timming lines line up at idle and dead center of the timming marks runs good at that but when I go out and 3500 rpm it starts to back fire out of the intake just wondering what would be my problem

      Thanks huchter358

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