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

[KEVIN RINEHIMER]

Thanks for advice! I was testing it in a Johnson service tank. Water was up past screen and over side inlet holes. It looked like there should have been plenty water height but maybe since it’s a short shaft it didn’t have enough water submersion? I don’t think I can use muffs on this model either…
Since the driveshaft doesn’t have a part number stamped on it, how should I verify it’s the correct one without ordering a new one?
The driveshaft seems like it’s sitting on a spring at certain times and it will float up and down freely most of time when disassembled in a springy action. I will take gear case apart if I need to so I can make sure the support is present and not damaged.
I posted a classified for a new water pump kit so that I can have additional parts for comparison and replacement since the plate and housing seem to have been through hell.

Thank you Sir!