fresh water pump

I had a functional water system. Accidentally ran one of my tanks dry, and then water pump wouldn’t shut off. Pulled air through it by mistake and noticed what I did and so I shut off the pump. Now I needed to figure out how to prime the system.. Got the system primed and can pull water to hand...

I have an M-12 two-cylinder 10 HP Universal Diesel inboard motor in my 1984 ODay 28. I replaced the fresh water pump 4 years ago. I replace the sea water impeller every year. I went to order a replacement impeller (301339) for the fresh water pump (UNV-301336). I'm told that is an obsolete...