Yanmar clone. Should be able to look up Yanmar for more info and maybe parts. They cloned a tried and true design. We've used Yanmars to pump barges for decades. You can't hardly kill those things. We've got some fron the 90's still running. I always wondered how one would do on a go kart with the right gearing. Thanks for doing this.
*To pull start, hold the comp switch, pull 3x, pull till it stops, put the switch down. (It should stay down) then rip it. You get some nasty recoil if you don't have the switch down.