Billet Alloy Crankshaft +.200" Briggs Model 13 Flathead. 2.637" total stroke. Machined from the hardest, toughest material ever used for small 4 stroke engines. 1" journal with a 3/4" PTO shaft.
*** If using in OHV engine, re-balance is required - Outer 3rd / 4th bearing supports highly recommended ***