Reply To: 1961 Johnson 40 (RDSL-23) stops pumping water

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August 5, 2021 at 7:53 am #244287
Don
Participant

    US Member
    Monte NZ wrote:

    If it help, I hit a submerged log once with my 1963 40hp Evinrude Big Twin, which resulted in a crack as shown in Franks photo with the red wording.
    The only difference in my case ,was that the crack extended to the gear box, resulting in an oil leak.

    Might be worth hooking up an electric drill to the drive shaft to see how well the pump works.

    Monte NZ

    Good point Monte….But, we have to keep in mind that this test won’t duplicate any exhaust leaks….
    But, if the pump doesn’t perform at all during this test, then that certainly indicates an issue….The only tricky part is the two tube system….I guess I would install one of the water tubes in the outlet water pump grommet and keep the return grommet under water while testing…..