Bob I'm probably wrong. But I had one I think it was a PU-179 and the engine was probably abt 3 & 1/2 Hp. Got mine out of Mars. I missed out on a 10Kw rig PU-?? Had something like a flat head 2 or 4 cyl engine. My OIC of Mars beat me out of that. I want to say it was a PU-97 again I'm not sure. Memory bank fading fast now day's. Stan KG4HUC