it's a little older, but works good, it's a heavy bastard, probably 75 lbs +, I think the shaft is an inch in diameter, but I'll have to look. No splines, just a keyway. I would say it's approx. 18" long and 12" in diameter. It also has a magnetic starter control box if someone wants it. If someone's really interested I can run to glyndon and get some definite dimensions and pictures. But how can you go wrong with free??