This engine has a 3/4" x 2-5/16" shaft on it. The Briggs Intek OHV 5-7.75hp engines will normally replace these engines.
Additional Info
You will need to replace the mounting studs with normal bolts for mounting. If your chute control rod goes above the engine, you will have to buy the same series of engine or modify it so the crank is out of the way.