Select page: PICT-21.1 21 Engine ST808479 Engine ST809747 Piston and Crankshaft ST809753 Cylinder Head ST809805 Engine Oil Pump and Filter ST810676 Engine Gasket Kit ST810682 Flywheel Screen, Engine Shrouds and Fan Housing ST908287 Cylinder Block and Dipstick ST948528 Cylinder Head Kit, High Compression ST976929 Cylinder Head Kit Other parts group: 20 Engine GU21505, GU21506 21 Engine 30 Fuel and Air 40 Electrical 50 Power Train 60 Steering and Brakes 80 Wheels, Frame and Operators Station 85 Mower Deck and Lift Linkage 86 Material Collection System 90 Labels and Optional Equipment