Thanks to Alan Lovchik, we do have an excellent cross-reference of which Marvel Schebler carbs were used on which certified engines, here:
http://www.2aps.com/CFS%20CarbAppl.pdf And per William Wynne: "The part no. of an MA3-SPA from an O-200 is 10-4894. It is by far the most common MA3-SPA. Although there are many other numbers, their production was small compared with the 4894. We've run other MA3-SPAs on the dynamometer and they don't run as cleanly as the one from the O-200 [on the Corvair engine]. The one on our own airplane [the ZenVair] has absolutely no rejetting or resetting of any kind. We just took it off the O-200, cleaned it up and put it on the 601" Oscar Zuniga San Antonio, TX mailto: taildr...@hotmail.com website at http://www.flysquirrel.net
