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April 11, 2019 at 3:11 pm
#173106
I have a 1956 12 HP Sea King (very similar motor, remote tank). It ran skipping stumbling etc and was not sensitive to the carb needle settings. Although I had replaced the needle packings the motor needed additional packings on top of those already there. I think it was drawing air past the packings and running lean. Ran beautifully after that and was sensitive to the carb needle adjustments. Suggest you try adding some packings first. Good luck.