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Parts Selection Guide

Find the parts you need

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Prop Selection Guide

Find the right prop for your boat

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      Mercruiser Gearcase & Drive Parts

      • Sterndrive Engineering Repl Mercruiser Drive Alpha One GenII - Upper/Lower Together
        $2,519.99
        $2,099.99

        Sterndrive Engineering Replacement Mercruiser Drive Alpha One Gen II Every boater knows that there are several forms of propulsion available for their vessel. These are inboard, outboard, and sterndrive models. Sterndrive models combine elements of both...

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      • Sterndrive Engineering Repl Lower Unit Merc Alpha One GenII
        $1,409.99
        $1,174.99

        Sterndrive Engineering Replacement Lower Unit Mercruiser Alpha One Gen II Lower unit replacements are an expensive headache for any boat owner.  A Sterndrive Engineering Replacement Lower Unit can take some of the sting out of an expensive repair...

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      • Sierra 18-2644 Upper Unit Seal Kit Replaces 26-88397A1
        $42.49
        $29.99

        Sierra 18-2644 Mercruiser Alpha I Gen II Drive Shaft Housing Seal Kit Sierra high-quality engine parts are designed to meet OEM specifications. For Alpha I Gen II  Kit Contains: (1) 18-2003 Oil Seal (2) 18-2056 Oil Seal (1) 18-2715 Check...

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      • Sierra 18-2599 Face Seal And Tool Replaces 26-816575A2
        $7.49
        $5.99

        Sierra 18-2599 Mercruiser Alpha 1 Gen II Face Seal & Tool Sierra high-quality engine parts are designed to meet OEM specifications. Fits Mercruiser Stern Drives and Mercury Marine engines. Fits Alpha One Gen II drives Interchangeable...

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      • Sierra 18-21005 Gimbal Bearing Replaces 32-45973
        $111.49
        $77.99

        Sierra 18-21005 Gimbal Bearing for Mercruiser Stern Drives Sierra high-quality gimbal bearings are greasable and fit all Bravo, and Alpha One Gen II (1998 & up). Interchangeable with: Mallory 9-72412 Mercruiser Stern...

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      • Sierra 18-8212-1 Transom Seal Kit Replaces 30-803100T1
        $408.99
        $285.99

        Mercruiser Bravo Transom Seal Kit by Sierra Used on all Bravo Sterndrives 1982 and Up. Key Features: Greasable Gimbal Bearing Kit Includes: 18-2753-1 Shift Cable Bellow 18-2100 Gimbal Bearing 18-2756 U-Joint Bellows 18-2750 Exhaust...

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      • Sierra 18-4442 Engine Alignment Tool Replaces 91-805475A1
        $174.99
        $132.99

        Engine Alignment Tool for Mercruiser, OMC, Volvo Used to verify engine alignment on the following: All MC-I, R-MR, Alpha 1, Alpha One/Gen 2 drives All Bravo drives All OMC Cobra drives Replaces: Mercruiser OEM 91-805475A1, 91-57797A3, 91-37384,...

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      • Sterndrive Engineering SE106 Replacement Mercruiser Drive
        $2,184.99
        $1,899.99

        Sterndrive Engineering SE106 Replacement Mercruiser Drive R, MR, Alpha One Complete Replacement Outdrive for Mercruiser R, MR, and Alpha One. 1972 - 1990. Please verify your serial number to be sure if you have a Gen 1 or Gen 2 drive. Brand New...

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      • Sierra 18-2097 U-Joint Permalube Replaces 805536A2
        $100.49
        $69.99

        Sierra 18-2097 U-joint for Mercruiser Alpha Generation 2 Stern Drives Sierra high quality parts are designed to meet OEM specifications. Features permalube and fits Mercruiser Generation II drives (0F680000 & Up). Interchangeable...

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      • Sierra 18-2603E Lower Shift Cable Kit Replaces 865436A03
        $216.49
        $151.49

        Sierra 18-2603E Mercruiser Alpha 1 Gen II TFXtreme Lower Shift Cable Sierra aftermarket engine parts are manufactured to meet or exceed OEM requirements. This cable requires a 18-9606E (Xtreme Shift Cable Tool) to complete installation Kit...

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      • Sierra 18-3219 Water Tube Replaces 42724A3
        $41.49
        $28.99

        Sierra 18-3219 Mercruiser Water Tube & Cover Kit Sierra replacement engine parts are designed to meet OEM specifications. For Merc I and Alpha I Drives. Models: I, 1A, 1B, 1C, 1CEZ, 120, 140, 160, 165, 888, 898, 228, 225-S, 233, 250, 260, 470,...

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      • Sierra 18-2760 Exhaust Tube Replaces 78458A1
        $60.99
        $45.99

        Sierra 18-2760 Mercruiser High Performance Exhaust Tube Fits Alpha Gen 1 and 2 and All Bravo Drives(Clamp Included). Sierra high quality aftermarket engine parts are manufactured to meet or exceed OEM requirements. Interchangeable...

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      • Sierra 18-2171 Engine Coupler Replaces 76850A2
        $301.99
        $211.49

        Sierra 18-2171 Mercruiser Engine Coupler Sierra replacement round style engine coupler for all GM marine engines Except Mercruiser MR/Alpha/Bravo with Triangular, 3-bolt coupler. All Sierra aftermarket parts are manufactured to meet or exceed OEM...

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      • Sierra 18-6406 U-Joint
        $152.99
        $106.99

        U-Joint - Special Order est. 10 Days Key Features: GKN new style with external clips Additional Details For: Mercruiser Vazer Replaces: Mallory 9-72413 9-72414 Mercruiser 865510T 865493A01 865496A02 865496A01 865511T Volvo Penta ...

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      Mercruiser OEM Engine Parts Finder

      Mercruiser Gearcase

      Shims, yokes, and spools may throw your head in a whirl. Just the idea of “gearcase” is an intimidating one, especially for newer boaters and those just taking on the do-it-yourself route. You’ve made a wise choice with your Mercruiser engine, but are now hoping to perform preventative maintenance or repair a busted part. Wholesale Marine has all that you need for your Mercruiser gearcase for pre-Alpha, Alpha, and Bravo drives.

      Where to Begin?

      Whether a pro boater or a casual weekend cruiser, your Mercruiser gearcase needs attention from time to time. The delicate intricacies of the gearcase are not to be taken lightly, and we recommend referring to your engine’s manual, manufacturer’s website, or a number of other resources as you diagnose or update your boat’s engine. Once you know what you are looking for, we strive to make it as easy as possible to locate it, beginning with our Parts Selection Guide. We offer a wide array of Mercruiser gearcase components. Both upper and lower gear housing seal kits are offered, each one meeting OEM standards and including all that you need. Upper unit gears, shift spools, replacement drives, shims, O-rings, and seals make this an excellent comprehensive site for all of your Mercruiser gearcase needs.

      Whether an engine expert or a newer novice, we want to assist you in your Mercruiser gearcase journey. We have a highly-trained team full of experienced boaters who have been in your shoes and can help you choose the right part from the get-go. We are here Monday through Friday, 9:00 AM to 6:00 PM EST, at (877) 388-2628 to help you narrow down your search and select just the right part for the job. Our Captain’s Club loyalty rewards program, shipping perks, and price match guarantee are added bonuses to ensure each and every customers’ satisfaction