The Hustler 604491 Flat Idler Pulley is an OEM replacement part crafted to guide and maintain proper tension on pump and deck drive belts in Hustler (and BigDog) zero-turn mowers. Made from durable composite materials with a sealed bearing, it provides smooth, vibration-free belt operation and reliable performance day after day
Fitment:
Hustler:
- Raptor (36″–54″ decks): models 931741, 931881, 931899, 933069, 933077, 933382, 933937, 934414, 934786, 935734, 935742, 935759, 935767, 935791, 935817, 937748, 937755, 937763, 937813, 937847, 937854, 938159, 938167, 938563, 938571, 938589, 938597, 938605, 939165, 939215, 939223, 939389
- Raptor Flip‑Up (48″/54″): 933614, 933622, 933846, 933853, 934745, 935940, 935957, 935965, 938464, 938472
- Raptor Limited, SD, SDX – various 48″–60″ models
