One New Aftermarket Replacement Secondary Mower Deck Belt for Hustler Zero-Turn Mowers
This replacement V-belt serves as the secondary mower deck belt on Hustler rear discharge zero-turn mowers, running between the deck pulleys on the mower deck itself. It is used in conjunction with a separate primary belt that runs from the engine to the deck. This belt fits 60″ and 72″ Z Diesel rear discharge models (2014 and newer) as well as early 60″ X-ONE rear discharge models equipped with the square XR7 mower deck.
Important fitment note: Z Diesel 60″ rear discharge models require two mower deck belts — use this belt (603397) as the secondary deck belt together with primary belt 602854. Z Diesel 72″ rear discharge models require two belts — use 603397 as the secondary deck belt together with primary belt 603522. Early X-ONE 60″ rear discharge models with the square XR7 deck require two belts — use 603397 as the secondary deck belt together with primary belt 777185. Newer X-ONE models require only one deck belt and do not use this part.
Specifications
- Belt Type: V-Belt (B Section)
- Width: 5/8″
- Length: 136.2″
Compatible Models
Hustler Z Diesel – 60″ Rear Discharge (2014-Current): 938241US, 932681US, 940460US, 943241US
Hustler Z Diesel – 72″ Rear Discharge (2014-Current): 938266US, 940486US, 943266US, 932707US
Hustler X-ONE – 60″ Rear Discharge (Early Models with Square XR7 Deck): Verify model has XR7 square deck configuration requiring two deck belts
Replaces Part Number(s):
603397, A-603397-AI
New aftermarket replacement part – not remanufactured, not used.






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