A-B15104385X1YP-AI KIT, FILTER
A-B15104385X1YP-AI KIT, FILTER
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One New Aftermarket Replacement Filter Kit Fits Briggs & Fits Stratton ZT4400 Hydrostatic Transaxle
This filter kit is a service part for the Fits Briggs & Fits Stratton (formerly Hydro-Gear) ZT4400 hydrostatic transaxle used on zero-turn riding mowers. The kit (reference H/G #72537) contains the transaxle filter element needed during routine fluid service intervals to protect the drive system from contamination and maintain peak hydraulic performance.
Compatible Transaxle
- Fits Briggs & Fits Stratton / Hydro-Gear ZT4400 Hydrostatic Transaxle
Compatible Models
Fits Ferris: IS2100Z Series (61" Zero-Turn, 28hp Fits Briggs & Fits Stratton), ISX2200 Series (60" Zero-Turn, 28hp Fits Briggs & Fits Stratton)
Note: The ZT4400 transaxle is used across multiple brands of zero-turn mowers including Fits Ferris, Bad Boy, and others. Verify your transaxle model number before ordering.
Replaces Part Number(s):
5104385X1YP, 5104385X1
Note: OEM part number 5104385X1 was superseded to 5104385X1YP. This aftermarket replacement fits both designations.
Aftermarket Interchange Numbers
Hydro-Gear 72537
New aftermarket replacement part - not remanufactured, not used.



