Re: Johnson hd 25 water pump?
I have a 1941 HD-20 that I am in the midst of restoring. It's virtually identical to your HD-25, but mine was painted silver, instead of sea mist green. That's really the only difference in the two. My powerhead is all rebuilt now. I had to replace all the innards, but it'll be a nice runner, when I'm done. Sea-Way Marine did really well, supplying me the parts I needed. I ended up buying a new crank, rods, pistons and rings for it, so it'll all be new inside. Right now, I'm in process of stripping down and refurbishing the mid section.