Engine features: 4-valve cylinder head, D.W.-L.S. Governor. Engine configuration (from flywheel): Starter, governor on right, Exhaust, blower and oil canister on left with right hand rotation. Test ran 6-12-20: Non running core with 20 psi oil pressure cranking. Turns over good. Missing two injectors. Selling as a re-pairable/re-buildable core as is, as pictured. O/H kits available.