I have 2 horizontal engines for sale: Tecumseh 4 h.p. engine from a snowblower, 1 inch shaft, 2 3/4 inch long, #'s are : HS40 55513F serial# 93059. The end of the shaft is drilled but has no threads. Engine runs perfect, no smoke or noises. I ran it with my test carburetor that is not included...