Reply To: Backfire/misfire thru carb

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August 20, 2020 at 11:21 pm #212262
David Stanton
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    On an old 4.2 HP Champion model 1J, there has always been a throttle setting a bit above idle where the carb can’t decide between the high and low speed jet where it repeatedly backfires. I just move the throttle a tad up or down and it goes away. All motors have a similar rough-running throttle spot, but that Champion is the only one I’ve seen repeatedly backfire.
    Dave