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87 40 ETLH bucking

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  • 87 40 ETLH bucking

    I just bought this motor. and have had It out and it runs good at low speeds, but once you start to acclerate the engine stars bucking. the spark plugs look new, dont know if the gap is set right. Any suggetions would be helpful.

  • #2
    Check compression, check to see if have spark on all cylinders, may need to remove and clean carbs.
    Regards
    Boats.net
    Yamaha Outboard Parts

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