Viewers of this video should pay particular attention to how the operator STARTS the engine. This is the ONLY correct way to do this. The flywheel is pulled back against compression and simply released as the engine fires. The engine then reverses direction and begins to run in the correct rotation. Trying to start the engine by pulling the flywheel in the operating direction initially is EXTREMELY dangerous. The engine will fire as the flywheel is being taken over top dead center and pull the operator’s hand/arm into the running engine. Watch the fellow in the video; he does it correctly. I have seventy years experience running R.M. Wade drag saws and own two. And still have all arms/hands/fingers.
I owned one of them... great little motor... it was missing the badge so I had to take it to a rally and put a sign up if anyone knew the make of motor... A chap said it was a wade motor.. I painted it a Indian red colour... When I found it I took it home and clean plug and clean fuel and it started ... near jumped off my work beanch
Definitely an interesting bit of engineering there. But got to say, that's one of the most frightening pieces of equipment I've ever witnessed. Would be a poster child for OSHA equipment safety hazards! Doesn't look like there's a single part of that thing that wouldn't eagerly maim or devour you if you got something too close to it.