The original engine had a 3/4" x 2-1/4" main shaft and a second 5/8" pto shaft to run reverse. You may be able to use the Briggs engine listed with two shafts. However, you will probably have to buy a new belt and pulley because the shaft height for the second shaft will be lower than your current second shaft and the second shaft on the new engines is 1/2" diameter. Please note that if you buy an engine without the extra PTO shaft on it your reverse will NOT work.
