Ferris 5103671 – Replacement MPN: 5103871 Genuine Ferris Product, Part Number: 5103671 Replaces OEM Part Numbers: Ferris: 5103871 Fits: Ferris: IS1500ZX, IS2500Z, Procut S, IS2000Z, IS1500Z, IS500Z Zero-Turn Mowers 772T SPB4439 Deck Belt Genuine OEM Part Number: Ferris 5103671.