Ariens 53200100 – Replacement MPN: 03203400 OEM Ariens Part Number: 53200100 Fits Ariens: ST624E, ST520E, ST724, ST2+2 Models SHAFT AND WORM GEAR ASSEMBLY Genuine Ariens Part # 53200100. Ariens 53200100 Shaft and Worm Gear Assembly EverRide ST624E ST520E ST724 ST2+2. Ariens Part Number: 53200100 Replaces Previous MPN: 03203400 Compatible with the following Models: Ariens ST824 Ariens ST724E Ariens ST724 Ariens ST624E Ariens ST624 Ariens ST5520E Ariens ST524E Ariens ST524 Ariens ST520 Ariens ST504 Ariens ST5+2 20 Ariens ST420 Ariens ST3520 Ariens ST350 Ariens ST270 Ariens ST2+2 20 Deluxe Ariens ST2+2 20. We are proud to be a factory authorized retailer. We use several different carriers and choose the most economical for the item and destination based on the estimated transit time displayed. FixMyToys – A Division of Ball Equipment.