KOHLER Confidant featuring CYCLONIC AIR FILTER Engine. Cast Iron Cylinder Sleeve. 12V Solenoid Shift Electric Start. X 4-5/16 length keyed Crankshaft. PLEASE make sure you compare your engine crankshaft size with this Crankshaft size. Crankshaft drilled/tapped 7/16-20 crankshaft, ready for bolt. Low Oil Shut Down. Engine Has No Oil, You Must Add Before Starting.