Reply To: 1953 Johnson Seahorse 25 hp RD-15 not pumping water

[fisherman6]

Should be no need for any hose in there at all. I would remove that. As long as the tube is in the midsection properly, if the pump is moving water, it will get to the tube. The impeller plate is not flat. They are actually supposed to sit so the convex side is up (facing the impeller). If the drive key spun below the impeller something is not right. When all is correct with the gearcase, the drive key / pin will be close to the center of the impeller’s thickness. I’m not sure if it is possible to install this particular impeller plate upside down or not. I’m not sure what you have going on that caused that, but it sounds like there is another issue to be sorted out. If the drive pin actually bent the impeller plate down there is definitely another problem that need to be sorted out. I do not have one of these apart right now and for the time being I’m not able to post pictures on this site. When that capability returns, maybe I can post pics of one of mine. In the mean time, there may be someone else that has pics available of theirs and can post them here through an external host.

Frank,
It is likely if you don’t recall a gasket ever being there that there never was one there. I do have one of these that has a gasket installed in there and that gasket was there when I got the motor. It could have easily been a homemade gasket though. I did not look at it that closely and I just left it in place when I serviced the gearcase and replaced the impeller. I know the ones that I sealed up with anerobic sealer work great.

-Ben

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