When I bought my RV-4 this starter was installed. Can anyone give me any info on it? I assume it is some sort of auto conversion. Throw it out? Keep it?
That starter looks like a starter for a Toyota 22R motor with some type of home fabricated bracket. The 22R was a 4 cylinder motor used in the 80's and 90s. I know the motor was in the Corona (before the Corolla) pick up and 4 runner, probably others. I disassembled those starters countless times after weekends of playing in the mud in my 4x4 Toyota trucks. Water would get in them and the contacts would stick. I grew up and learned to fly, much cleaner. Much more fun. Much harder on the wallet!
I second the idea about Sky-Tec. Trash that thing and go talk to Les Staples, the owner. I put one of his lightweight starters on my Grumman. Great guy and he'll have what you need.
I believe your starter was made by Nippondenso. Slight variations are used on many foreign cars (Toyota and Subaru come to mind). If you look at a Summit Racing or Jeg's catalog, you will find the same basic starter adapted for automotive high performance applications. I adapted one from a Subaru to VW engine in my Dragonfly last year and I love it. It it has been working well for you, why change it.
Gary