Waterpump for 40 hp Mercury Tracker

[BD1]

I have a 40 hp Mercury Tracker (0G159621) about 1995. I need to replace the impellor because of a broken fin. I ordered the kit (46-77177A3) that is sold for a Mercury (all searches seem to lead to this number) but the impellor ID and pump housing are for a 5/8" drive shaft. The drive shaft in my engine is 3/4". The exterior of the pump housings are identical and otherwise the kit is a very close match. Any suggestions for getting the correct impellor would be greatly appreciated.

 

[racerone]

Perhaps you need a kit for a " bigfoot " model.