New to this list and have a general question.

Seems like there has been a lot of work done on auto-engine conversions, redesigned vw engines, corvairs etc, even a Mercedes aluminum block diesel engine conversion.

Why don't I see or read about anyone converting the many types of 2 cycle/4 cycle outboard engines for use in an experimental aircraft? Is it a weight problem, redrive problem - what???

Thanks
Rodney