Cool rc engine. Had a wankel in one of my old Evinrude snowmobiles. Interesting write up on it, despite me drifting like a UP snow drift. It definitely weighed a lot like article says and rode like a bulldozer, stripped out the plug threads on it due to engine design couldn't put a helicoil in it. Unfortunately ended up parting it out and scrapping the rest over 30 yrs ago.

Flashback: The 1973 Evinrude Trailblazer | SnowGoer
An advertisement for the 1973 Evinrude Trailblazer. In June 1964, Outboard Marine Corporation (OMC) became the first big name manufacturer to enter the

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