Reply To: 1956 Evinrude Big Twin #25022 water pump

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January 4, 2020 at 9:56 pm #190967
frankr
Participant
    Bob Wight wrote:

    Is the impeller plate sealed against the gearcase housing? Is the air bleed hole in the top of the impeller housing open?

    Those were going to be my next suggestions. But you said you already changed the pump housing so that sort of eliminates the bleed hole idea. What’s left? Plate sealed to top of gearcase (sucking air)