Re: Finding a replacement starter '63 OMC
I believe that your starter is the same one that was used for many years, starting with the ERude Bigtwins and Johnson Seahorses of the middle fifties. It can also be found on the Jonyrude 28hp motors, the 33hp motors and, as well as the various "Superquiet" versions in the 35hp and 40 hp range. Because of this, there are a lot of used examples on the auction sites.There is also another brand that was used, but I can't remember it right now. If you run across one, it should fit your starter bracket, as well.
One of the things that I found to be interesting about the site that I found (Dixie-Electric), is that the Prestolite starter listing says that the application is for a Wisconsin engine. According to the Wisconsin Motors website, their motors are typically used to power sweepers, wood grinders, concrete pumps, concrete saws, lifts and trenchers. This means that there is a much broader market for these starters than just the older OMC motors, and that is a good thing because it means there will be continued availability of this item.