Does anyone know the typical engine rpm for something like a 16hp v-twin (MTD 42" Riding mower, maybe)? I'm starting a new project to mis-use a MTD 618-04381A transaxle and am curious about how fast the engine runs? I know the size of the pulley on the transaxle and have a rough idea of the pulley that would be on the engine, I'm just not sure how fast the engine might run.