Outboard Motors

[skippydiesel]

On my way home his arvo (acquiring chain saw parts is specifically allowed under NSW Lockdown) I chanced to be behind a small truck pulling a large boat. Said boat was fitted with an outboard motor of the Yamaha breed. - specifically a 300V6 4.2L purporting to deliver 5000-6000 RPM & ??HP (weirdly performance doesn't seem to feature on their web site). Anyhow I am impressed by the compactness of the engine/gearbox/etc I got to wondering, could such an engine be adapted to an aircraft. After all the Max RPM (presumably sustainable) is very much in the Rotax type range.

 

So the Q is has an outboard engine ever been adapted to fit an aircraft?

If yes - what type of engine/aircraft

Was it a success/failure?

If not ever done  -why nit?