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Impeller was replaced. Still has the original style aluminum pump housing but it seemed in usable condition. I think I need to drop the gearcase again, though, as when I put it on I didn’t know how to use the plastic sleeves to ensure the two water tubes are properly in the pump.
No sign of any sort of telltale on this motor, but there was an undrilled boss on the #1 cylinder water jacket. Maybe originally for a choke heater or? It’s about an inch below the top of the water jacket so not ideal, but I tapped it for a fitting. Anybody think it worthwhile to drill and the real top of the water jacket? I could do it safely with stops on the drill.
Alan
Note: I wrote this before seeing Frank’s response. Thanks!