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Sierra's 18-8387 Lower Unit Seal Kit is designed for use in Johnson/Evinrude E-Tec 15 HP, 25 HP, and 30 HP outboard engines. The kit contains: (1) Sierra 18-2065 Oil Seal, (1) Sierra 18-2539 Rubber Seal, (2) Sierra 18-2026 Oil Seals, (1) Sierra 18-2033 Oil Seal, (1) Sierra 18-7146 O-Ring, (2) Sierra 18-7180 O-Rings, (3) Sierra 18-7109 O-Rings, (1) Sierra 18-0124 Impeller Plate Gasket, (1) Sierra 18-7108 O-Ring, (2) Sierra 18-7100 O-Rings, (2) Sierra 18-2945 Drain Screw Gaskets, and (2) Sierra 18-4255 E-Tec Drain Screws. The kit is interchangeable with Johnson/Evinrude Outboard 5007987. Check manufacturer recommendations to ensure a proper fit before purchasing. Each Sierra product meets or exceeds the original equipment part it replaces.