Always wanted to turbo a lawn mower just for the hell of it. I had a 6hp motor that I messed around with pushing crazy power (like 9, lol).. It shot fire out the exhaust and ran at what sounded like twice the rpm it did stock. I re-worked the "head" with a giant drill bit and some wire brushes chucked into a drill.. That sucker could breathe! Put a webber carb on it with one barrel working.. plugged off the other because it wouldn't run.. Had a stack exhaust (open 1.5" tube that was mandrel bent 90 degrees upward and stuck up about 9" above the motor)
I mowed with it twice before it chucked a rod.