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93 Johnson 25hp Backfire-ing multiple times at lower RPM'S

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  • 93 Johnson 25hp Backfire-ing multiple times at lower RPM'S

    My motor keeps backfire-ing multiple times until it kills at lower rpm's but once I get up on plane the motor runs fine. I've noticed that a black oily liquid is dripping down the side of the motor after running it for a while. Also, I noticed that when i was running it at night time without the cover I noticed that a flame would appear from the side of the motor every time it would backfire. Any suggestions or tips would be greatly appreciated.
    Thanks

  • #2
    May be lean popping, restricted or plugged low speed jets and passages in carbs, remove and clean carbs.
    Regards
    Boats.net
    Johnson Outboard Parts

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