The engine is a Generac GN-220 (GN220 GN 220) engine. It runs good. The crankshaft is a 3/4 inch shaft which may limit applications - please research.
GN 220 Generac Engine Specs:
RATED HORSEPOWER 7.8
DISPLACEMENT 220cc
PARK PLUG: Type: Champion RC12yc or equivalent
Set Gap To. 0.030 inch (0.76mm)
OIL (20 oz. capacity) SAE 30 weight
SOLID STATE IGNITION