I am not a Power Trac owner but when I searched the site, discussions of the Subaru Robin EH65 seemed to be concentrated in this forum.
I have a Bulldog BD700 UTV made by American Landmaster that was built in 2010. It has an EH65 engine. I recently removed the engine to replace a head gasket. While I had it out, I replaced both head gaskets and rocker cover gaskets. I removed the valves and cleaned the carbon from the valves and heads. As an extra step, I used some valve grinding compound on the valves to be sure the seats and mating surface on the valves were clean. Also cleaned the carburetor (Nikki) and replaced the needle valve, fuel stop solenoid and gaskets. Didn稚 touch anything to do with the ignition components.
I reinstalled the engine with new plugs, fuel lines, fuel pump, oil & filter. Engine started right up and idled very smooth. However, if I try to get the engine very much above an idle, it begins to spit and sputter and if I open the throttle far enough, it starts to spit/spray gas out of the top of the carburetor.
Suspecting I had adjusted the intake valves too tight, I rechecked them and the clearances were good.
Who can tell me what to check next to try and run this down? The way the engine sits in the frame, you cannot remove the blower housing without at least unbolting and raising the engine to get to the lower housing bolts. Don稚 want to do that unless someone thinks this is ignition related. Any insight or assistance would be appreciated.