I picked up 2 of these this weekend just gone, it seems the engine speed on mine is fixed, with no control, the throttle cable is for choke, run and stop positions only. I would suggest its based around a gxv120 as the gcv engines ran an overhead cam.
I wanted to change the fuel on the better one of the 2 I got thinking I would just run it out then replenish, on less than half a tank the engine ran for almost 1.5 hours, while it was hot I also dropped the oil.
They arent a bad engine, shame about the rubbish blade on the good one I got (the other had replaceable blades) and the tiny catcher.... I am pretty sure these were the ones bigW sold for $129, worst case, I sell mine for a carton of beer, then its paid for a good afternoon!
