So after some experimenting with impellers I have found what I think is an affordable solution that should be available for awhile. The impeller fits perfectly with the exception of the ID. The Oliver driveshaft is only 9/16”, which makes it the same as the KE7 not the KG7 as I originally reported. The hub material is hard plastic and is easy to file or machine to the correct diameter. I will likely switch the impeller key to an OMC style instead of the original pin style.
Honda BF8D part #19210-ZW9-013
For those of you interested in the details of this saga, I first attempted to find another useable impeller from the parts bin. I found that the Martin 100 impeller fits the driveshaft and housing perfectly, but would need some modification to the driveshaft as the key is different. This was never really a viable future solution since I can’t go to the Martin dealer down the street whenever I need another. The same can be said for the Mercury KE4/KE7/Mk7 impeller. The Scott-Atwater 7.5-10 hp impeller fit except for the ID. Knowing that the Honda impeller is a suitable replacement for the SA I chose to pursue it. It is not a perfect solution, but at $32 CAD it is more affordable than the specialty store options that run $50-70 USD plus shipping.
Wayne
Upper Canada Chapter
uccaomci.com