Top Quality Worm Gear, Made of Durable Antifrictional copper Replace for 536881950 9.5Hp Snowblower 536881650 6.5Hp Snowblower 536881750 Snowblower Gas 536884791 5Hp Snowblower 536887993 Snowblower Gas 536881800 Snowblower Gas 536887995 Snowthrower Gas 536887992 Snowthrower Gas 536884781 Snowblower 536886140 5 Hp 22" Dual Stage 120V Electric Start Snowblower 536885410 Snowblower 536885470 24" Snowblower 536885400 20" Snowblower 536885473 Snowblower 536885420 Snowblower 536885471 Snowblower 536885472 Snowblower 536887250 Snowblower 536886261 Snowblower Replace for 536.881550 Dual Stage Snow Thrower (2004)-->Gear Case 536.881750 Dual Stage Snow Thrower (2004)-->Gear Case 536.881800 Dual Stage Snow Thrower (2004)-->Gear Case 536.887995 Dual Stage Snow Thrower (2004)-->Gear Case 536.887996 Dual Stage Snow Thrower (2004)-->Gear Case 622505x105A Dual Stage Snow Thrower (2004)-->Gear Case 624604x43B Dual Stage Snow Thrower (2004)-->Gear Case C950-52009-1 Dual Stage Snow Thrower (2004 International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.