1953 rd-15 25hp seahorse!

IndyFish

Seaman
Joined
Feb 20, 2013
Messages
56
Added a 1953 or 54? rd-15 Johnson seahorse 25hp. I can't find a single parts diagram online for one, or even anyone who sells parts. Robbed a donor motor for ignition coils and I had condensers sitting on my shelf from another pre 60's Johnson build and fudged my way through the carb being careful of old gaskets (only had to make one out of gasket paper), but I can not find an impeller! I ran her for about 5 seconds in a barrel but shut it down because of no water flow.
anyone got advice on where the heck to get impellers, or someone know what else will work?

It is the old, old, oooooooold style with no water tube going to the pump housing. The water diverts around the side and to a tube cast into the housing. Which means that the other seahorse impellers any later than this one will not work. (different size shaft)

I think this one will be a runner. ORIGINAL OWNER said he only remembers having it out a handful of times. Under 10 hours on the motor for sure. everything under cowl is brand new shiny. None of the bolts even have mar marks on them from being taken off, etc. Cowl and outside is pretty dull, but due to sitting in the rafters of his garage for 60 some years

can post pics if anyone is interested in my little build
 

IndyFish

Seaman
Joined
Feb 20, 2013
Messages
56
ha, actually our website has em! I haven't had much luck in the past looking up parts through them. sierra 18-3006
thanks iboats
 

kat-a-tonik

Petty Officer 2nd Class
Joined
Jul 27, 2013
Messages
123
You may also find the parts at Napa, so far they have gotten me anything I need for my 58,63 and 66 Johnsons
 

F_R

Supreme Mariner
Joined
Jul 7, 2006
Messages
28,226
Original impeller part number 375808 superceded by 378891 superceded by 775521 now. (18-3006 here at iboats)
 

1946Zephyr

Vice Admiral
Joined
Oct 21, 2008
Messages
5,556
Try Sea-Way Marine, in Seattle. They stock a lot of parts for these oldies. You might also find it beneficial to join the AOMCI. That will open a huge venue of parts for your classic
 
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