Parts list: № Number Qty Name Options 1 RE524563 5 Piston Replacement Kit (0.25 OS), (MARKED RE518837) 2 RE524567 1 Piston Ring Kit 3 40M1855 2 Snap Ring 4 R503480 1 Piston Pin Next page: ST150377 9901 (PISTON/PISTON RING KIT 0.50 OS) ST150378 REPLACEMENT ENGINE ST150379 9901 (CONNECTING ROD BEARING KIT) ST150381 9901 (CRANKSHAFT PULLEY) ST150383 9901 (PISTON RING KIT) ST150375 9901 (COMPLETE BLOCK ASSEMBLY) ST150374 9901 (GOVERNOR LEVER KIT) ST150373 9901 (FLYWEIGHT KIT) ST150371 9901 (BEARING KIT 0.25 US) ST150369 9901 (THRUST WASHER KIT)