Lets see a pic of the PTO side, I think that's a Fuji engine from Japan they are the same as the one lung Polaris snow mobile engines.
I'll have to take one. It had a big ol mower clutch thingy on it that I tossed and what is left is a rather small PTO that can really just take like a 9 tooth gear driver. That is the only reason I tossed it aside initially. I'd have to get a jackshaft going, it's certainly not going to be able to accept a centrifigal clutch.
Yes it's a Japanese motor for sure. At some point Jacobsen either bought, or outsourced the engine building to, Fuji, I think. I can find out very little about the damn thing. I just happened on to a mower site that had parts. There should be a wiring harness in the shroud for lights if it's the same motor I saw on a diagram. Even if not, the thing is pretty cool and has spark and compression and I have a fondness for the oddities out there. So it'll be fun to get it going lights or not.
Title should read PLEASANT surprise. I've had my coffee now.. HAHA