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Product Details
✓BELT SPECS: 5/8" Wide x 74.8" Long – Primary mower deck drive belt (engine to deck). Replaces OEM Part Numbers: M169485, UC39236 (current superseding part number). Cross-references: Stens 266-295; Ferris 5021251, 5021251SM, 21251, 1521251. Always verify your OEM part number and deck configuration before ordering. Note: the secondary blade-to-blade deck belt for these same models is M169500 (5/8" x 103.5").
✓COMPATIBLE WITH JOHN DEERE X300 SELECT SERIES (42" MULCH & 48A DECK): Fits X350 with 42" Mulch Deck and 48" Deck; X354 with 42" Mulch Deck and 48" Deck; X370 with 42" Mulch Deck and 48" Deck; X380 with 42" Mulch Deck and 48" Deck; X384 with 42" Mulch Deck and 48" Deck; X390 with 42" Mulch Deck and 48" Deck; X394 with 48" Deck. Also fits X330 with 48" deck.
✓COMPATIBLE WITH JOHN DEERE X500 MULTI-TERRAIN SERIES (48A & 54A DECK): Fits X570 with 48" Deck and 54" Deck; X580 with 48" Deck and 54" Deck; X584 with 48" Deck and 54" Deck; X590 with 48" Deck and 54" Deck (Serial No. 110,001 and higher). Verify serial number for X590 models using the OEM sticker under the seat before ordering.
✓COMPATIBLE WITH FERRIS & JOHN DEERE FS-SERIES: Fits Ferris models using cross-reference 5021251, 5021251SM, 21251, and 1521251. Also fits John Deere commercial FS-Series: FS5600, FS5651, and FS5730. Verify OEM cross-reference before ordering for Ferris and FS-Series applications.
✓IMPORTANT – THIS IS THE PRIMARY (ENGINE-TO-DECK) BELT: M169485 is the primary deck drive belt that transfers power from the engine pulley to the mower deck. The secondary blade-to-blade belt on the same 48A/54A deck is M169500 (5/8" x 103.5"). M169485 fits 42", 48", and 54" mower decks depending on the model and configuration. Confirm your exact deck size and belt routing diagram before ordering to ensure you are replacing the correct belt.