IIRC, the Enya .60X was Enya's first iteration of a 10cc schneurle ported engine. I presently own a Mk. IV and one that just says X on the case. Haven't ran either yet, but if they ran like the samples that I saw flying (and flew) in the Seventies and Eighties, they are powerful and very pleasant/reliable engines.

Jim, W8YE, has put you on the prop path with the presentation of the engine's operating manual.


Ed Cregger