Reply To: 1957 johnson 18hp fuel mixture

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July 26, 2022 at 4:34 pm #263649
frankr
Participant

    The carbon seal at the top of the driveshaft (AD) seals the crankshaft bearing AND the splines.  No, there is no top crankshaft seal on an AD.  They rely on bearing fit to provide a seal.  It would have to be mighty sloppy worn out to prevent drawing fuel/air from the carb.