doing a bit more looking it's possibly a second or third generation Ryobi 4 stroke, it's definitely not an early ryobi since I have one of those... it's n OHV with the black stamped valve cover, angled plastic oil pan (makes mounting fun), fan schroud that unbolts with the mag mount on the schroud. From what I remember it had a sheet metal con rod (two pieces spot welded into an I beam)

another question I have is the spark plug, I need to find out if it's a resistor plug, I'll look at the part number tomorrow.

I was doing some searching on here and all of a sudden the search stopped working...