Re: 1935 Johnson Aero built 300 fuel mixture

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May 8, 2017 at 12:21 pm #57283
hotrod
Participant

    The DRAIN plug is removed to drain the cylinders of water before winter.
    The VENT plug is removed while filling the lower unit with grease. When grease starts to come out of this vent hole, the gearcase is full.
    The unmarked plug to remove for inserting grease is on the lower left side of the gearcase cover, just ahead of the prop.