I’ve seen chatter on other forums to about having to do a bit of filing to get the Honda impeller to work on these motors but I thought they were referring more to the slot in the impeller itself. They might have been referring to motors which have a hole drilled thru the shaft and the pin sticks out a bit on each side requiring another slot in the impeller. Heck, I’ve pulled motors apart before which had a piece of rusty nail driving the impeller and it worked. Stainless would be ideal but Mercury got away for years using steel keys which rusted away. I don’t see any reason why your setup wouldn’t work and I might have to do it myself when I get around to working on my bailer again.

As for the puck I made, it was a drop in fit and I used some epoxy to hold it in place and seal it around the bottom. I don’t know if I’ll be able to get it out again when the time comes to get the bailer function working again. As for the center hole, it could have been bored smaller but I was in a bind, way behind, and too lazy to change out to the four jaw chuck to get the correct offset.

I’ve been thinking about something else I did to my bailer pump when it was apart and I’m sure i tapped at least one, maybe two, inlet/outlet holes in it for plugs to prevent any chance of water leaks or exhaust gases getting into the cooling system. I’m sure the bailer inlet was one and possibly another one somewhere. Or, it might have just been a thought I had before coming up with the puck idea. Not sure.