Mercury Outboard Gearcase & Drive Parts

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Parts Selection Guide

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      • 12-19183-3
        List Price: $1.03
        Starting At: $0.86

        Drain Screw Gasket - Blue , Mercury - Mercruiser 12-19183-3 Used with the 3/8 - 16 drain/fill screw found on all Mercruiser and most Mercury/Mariner outboards except those of Japanese origin.

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      • Sierra 18-2945-9 Drain Screw Gasket (2Pk) Replaces 12-191833
        List Price: $2.78
        Starting At: $1.53

        Sierra 18-2945-9 Drain Screw Gasket (2 pack) This Sierra 18-2945 Drain Screw Gasket is used with 3/8-16 drain/fill screw found on all Mercruiser and most Mercury/Mariner O/Bs. This gasket is used in most lower units and sea water pumps. Sold as a 2...

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      • Sierra 18-4698 Drain Fill Washer Replaces 27-81987
        List Price: $1.99
        Starting At: $1.47

        Sierra 18-4698 Yamaha & Mercury Drain Fill Washer Sierra high-quality engine parts are designed to meet OEM specifications. Use with 18-2374 Magnetic Drain Screw Interchangeable with: Mallory 9-60100 Mercury...

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      • Sierra 18-2646-1 Lower Unit Seal Kit Replaces 26-816575A3
        List Price: $73.99
        Starting At: $32.24

        Mercruiser Alpha I Gen II Lower Unit Seal Kit by Sierra Used On All Mercruiser Alpha I Gen II Lower Units 1991-Up Kit Includes: Sie-18-2599 Face Seal And Tool Sie-18-2564 Water Pump Base To Face Plate Gasket Sie-18-2566 Face Plate To Water Pump Cover...

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      • Sierra 18-2654 Lower Unit Seal Kit Replaces 26-79831A1
        List Price: $68.99
        Starting At: $39.95

        Sierra 18-2654 Mercury Lower Unit Seal Kit Sierra high-quality replacement engine parts are designed to meet OEM specifications. Interchangeable with: GLM 87530 Mallory 9-74202 Mercury Marine 26-79831A1 Kit Includes: (1)...

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      • List Price: $0.99
        Starting At: $0.57

        Sierra 18-7116 O-Ring Replaces 25-62704 I.D.: 0.360" or 9.1mm Width: 0.100" or 2.5mm Interchangeable with: Chrysler/Force/US Marine 25-F24342 25-62704 GLM 81100 Johnson/Evinrude...

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      • Sierra 18-2655 Lower Unit Seal Kit Replaces 26-89238A2
        List Price: $61.49
        Starting At: $37.95

        Sierra 18-2655 Mercury Lower Unit Seal Kit Sierra high-quality lower unit seal kit fits Mercury/Mariner 135/150 V-6 (0A904646 & newer) and 175/200 V-6 (6618751 & newer). Interchangeable with: GLM 87540 Mallory 9-74201 Mercury...

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      • List Price: $1.99
        Starting At: $0.66

        Sierra 18-7168 O-Ring Sierra high-quality engine parts are designed to meet OEM specifications. For Johnson/Evinrude Outboards, Mercruiser Stern Drives, Mercury Marine, OMC Stern Drives and Volvo Penta engines. I.D.: 0.370" Width: 0...

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      • Sierra 18-3751 Spanner Nut Replaces 8M2011027
        List Price: $23.49
        Starting At: $15.45

        Sierra 18-3751 Spanner Nut for Mercury & Mercruiser Engines For IA/IB/IC & EZ Shift, MC-I, R, MR, Alpha One, Gen II, Vazer, TRS, Bravo I & IX Interchangeable with: GLM 21120 Mallory 9-72155 Mercruiser Stern...

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      • Sierra 18-2653 Lower Unit Seal Kit Replaces 26-55682A1
        List Price: $83.49
        Starting At: $53.45

        Sierra 18-2653 Mercury Lower Unit Seal Kit Sierra high-quality replacement engine parts are designed to meet OEM specifications. Interchangeable with: GLM 87520 Mallory 9-74203 Mercury Marine 26-55682A1 Kit Includes: (2)...

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      • Sierra 18-7173 O-Ring
        List Price: $2.49
        Starting At: $1.50

        Sierra 18-7173 O-Ring I.D.: 1.875" or 47.6mm Width: 0.135" or 3.4mm Fits MCM/MIE GM V-6 & V-8 engine, for thermostat housing with flat cover plate Interchangeable with: Chrysler/Force/US Marine 25-30224 GLM 82250 Johnson/Evinrude Outboard ...

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      • SEI Mercury Outboard 3.0L Replacement Lower Unit 1.75, 20"
        List Price: $1,104.00
        Starting At: $920.00

        Sterndrive Engineering Mercury Outboard 3.0L Replacement Lower Unit 1.75:1, 20" Driveshaft Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready when calling...

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      • SEI Mercury V6 Outboard Replacement Lower Unit 1.87, 20"
        List Price: $1,104.00
        Starting At: $920.00

        Sterndrive Engineering Mercury V6 Outboard Replacement Lower Unit 1.87:1, 20" Driveshaft Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready when calling...

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      • Sierra 18-29451-9 Drain Screw Gasket (50Pk)
        List Price: $47.49
        Starting At: $34.45

        Drain Screws Gaskets for Mercruiser, Mercury, OMC (50 pk) Replaces: GLM - 21170 Mallory - 9-60101 Merc - 12-19183-3 Redline - RL2945  

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      • SEI Mercury V6 Outboard Replacement Lower Unit 1.87, 25"
        List Price: $1,103.99
        Starting At: $919.99

        Sterndrive Engineering Mercury V6 Outboard Replacement Lower Unit 1.87:1, 25" Driveshaft Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready when calling...

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      • List Price: $1.99
        Starting At: $0.78

        Sierra 18-7158 O-Ring Sierra high-quality engine parts are designed to meet OEM specifications. I.D.: 0.740" Width: 0.100" Interchangeable with: GLM 81160 Johnson/Evinrude Outboard 309731 310585 Mallory 9-76543 Mercruiser...

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      • Sierra 18-2635 Lower Unit Seal Kit Replaces 26-814669A2
        List Price: $52.49
        Starting At: $34.45

        Lower Unit Seal Kit for Chrysler, Force Kit Includes: Sie-18-0500 Seal Sie-18-0622 Gasket,Lower Wear Plate Sie-18-2051 Seal Sie-18-2052 Seal Sie-18-2945 Washer Sie-18-7168 O-Ring Sie-18-7173 O-Ring Sie-18-7950 O-Ring   Replaces: Mercury -...

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      Mercury Outboard Gear Cases are in stock. This is your online destination for marine engine parts.