The pump impellor is Pt # 276857 and is a rather unique design 2-3/4 diaX 3/8 thick bore is ,680 and has three nubs , no key way.
While I was looking I also found the special drive shaft and prop shaft seals. These are also unique, as they are one piece molded rubber, having no metal casing. They pop into their respective bores and are held in place with a rib around the circumference.
Joe B
PS, just looked, there are a couple impellors on flea – bay
