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

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April 10, 2019 at 8:17 pm #173042
frankr
Participant

    A crankcase leak might be a valid guess, but probably not it. I’d sooner say the slow speed circuit in the carburetor is blocked. Or the carb butterfly is opening way too soon. Or the main bearings are worn out–but you would have noticed that, right?