I have been trying to figure this out for two days. Don't know why I just didn't ask the question here.

So, does the engine casing determine whether the mount is conical or dynafocal? Or  can the same engine use either mount? I think the answer is the former but I wanted to confirm.


I just bought a new-to-me O-235 and it sure looks like the mounting holes are set up for a straight conical mount, not an angled dynafocal mount. Or am I missing something? 

FYI - the engine is out of a Citabria.



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If the mount holes go strait front to back that is a Conical and NO you cant change them


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