Reply To: 1957 Sea King 12HP won't run right

[frankr]

That motor is responding to both high an slow speed adjustments. It is lean sneezing if you twirl the knob to the right and 4-stroking if you twirl it too the left. Speaking of twirling, that is what you are doing. Those things are sensitive and require minor dialing to get it right. I don’t think there is anything wrong that motor that won’t be corrected by putting it on a boat and adjusting the carb properly. High speed knob first at WOT, then slow down and do the slow speed knob.