Some of the parts are interchangeable but others are unique to the 20b. There is a special center housing, as well as the e-shaft so it's usually easier to just get a whole engine.
Is it possible to build a 20 b engine from parts??? Maybe a 13 b core and a 20 b eccentric shaft. Sam Sent from my iPhone 4 -- Homepage: http://www.flyrotary.com/ Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html