Does anyone know the the size of the engine (inner) pulley for the Groundsmaster 117,118,120. All came with Kohler engines, 1" x 3 9/16" or 3 1/2" crankshafts. I have the electric PTO pulley, but need the other one. Toro part no. is 54-2330. I am looking to re-power, bought it without an engine. Thanks. Also posted in the Toro/Wheelhorse section.