Impeller ? for 115 omc 1976

[carpenterken]

when I went to replace my Impeller with a new one, I noticed the new impeller had a flat spot on the in side and, the shaft has a round type key way.
Did omc change the key way over the years or, is the flat type ok with the round key way?

 

[carpenterken]

Re: Impeller ? for 115 omc 1976

After looking at the impellers on this site, I think they gave me one for a 1979 or newer motor.

 

[tashasdaddy]

Re: Impeller ? for 115 omc 1976

the round part of the key goes into the shaft, the straight side goes into the impeller.

 

[Dhadley]

Re: Impeller ? for 115 omc 1976

Yes, that impeller is for a newer style shaft that uses a wedge rather than a key. Make sure to change the pump kit, not just the impeller.