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      Mercruiser Gearcase & Drive Parts Product Listings

      • Mercruiser 98-8M0108208 Engine Coupler Assembly
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        $768.49
        $645.49

        Mercruiser 98-8M0108208 Engine Coupler Assembly Genuine OEM Mercury-Mercruiser part. Fits: MCM 496 Mag & HO engines Round shape Flywheel mount Special Order Mercury Marine Information: Additional...

      • SEI Mercruiser  Alpha 1 Propshaft 6 Jaw
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        $438.05
        $365.04

        Sterndrive Engineering Alpha 1 Propshaft 6 Jaw Fits: Mercruiser I,R,MR Alpha I & Gen II drives 1973 to current Standard Right Hand Rotation Mercury Outboard 70-125 HP Metric Inline 3 &...

      • SEI Mercruiser Outboard 4.3L Repl Upper Unit 1.81
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        $1,500.60
        $1,250.50

        SEI Mercruiser Outboard 4.3L Repl Upper Unit 1.81 Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready when...

      • Sierra 18-1142 Upper Pinion Bearing
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        $64.69
        $46.59

        Sierra 18-1142 Upper Pinion Bearing Sierra Marine replacement Upper Pinion Bearing for Mercruiser Stern Drives. This part fits I, R, MR, Alpha One, and Gen II drives with a 1.50 ratio. All Sierra...

      • Sierra 18-1150 Needle Roller Bearing
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        $70.99
        $49.49

        Sierra 18-1150 Mercruiser Needle Roller Bearing Sierra high-quality engine parts are designed to meet OEM specifications. Fits MC-I & R drives Interchangeable...

      • Sierra 18-2159 Inner Shift Cable
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        $100.09
        $71.99

        Sierra 18-2159 Inner Shift Cable Sierra replacement inner shift cable for Mercruiser Stern Drives. Standard Core: 73" Fits MC-I, R, MR, Alpha One & Gen II (1978 & newer) Use with: 18-2157...

      • Sierra 18-2282 Shim
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        $16.59
        $11.99

        Shim - Special Order est. 10 Days

      • Sierra 18-2295 Mercruiser Shim Kit
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        $33.79
        $26.39

        Sierra 18-2295 Mercruiser Shim Kit Sierra shim kit for Mercruiser Vazer Drives. Fits: Mercruiser Vazer Lower Drive Shaft Bearing Kit Contains: (1) of each - .002, .003, .005, .010, ...

      • Sierra 18-2296 Mercruiser Shim
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        $8.59
        $6.69

        Sierra 18-2296 Mercruiser Shim Sierra replacement shim for Mercruiser Stern Drives. Size: .055 Interchangeable with: GLM 28380 Mercruiser Stern...

      • Sierra 18-7161-9 O-Ring (Pkg Of 5)
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        $17.49
        $13.69

        Sierra 18-7161-9 O-Ring (Pkg Of 5) Sierra replacement O-ring for Mercruiser and Mercury engines. I.D.: 3.250" or 82.6mm Width: 0.070" or 1.8mm Package of 5 Interchangeable...

      • Mercruiser 31-803096T-1 Bearing Repair Kit
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        $380.99
        $335.49

        Mercruiser 31-803096T-1 Bearing Repair Kit Genuine OEM Mercury-Mercruiser part. Fits Alpha One Gen II (s/n 0L100040 and up) Standard rotation (RH) .Special Order Item: This product is ordered...

      • Mercruiser 43-18411A-2 Upper Gear Set - 1.50:1
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        $757.49
        $635.99

        Mercruiser 43-18411A-2 Upper Gear Set - 1.50:1 Genuine OEM Mercury-Mercruiser part. Fits: MC‑I, R, MR, Alpha One & Gen II (s/n 0K999999 and below) (1971‑1997) 22-20 Teeth 1.50/1.47 Ratio .Special...

      • Mercruiser 43-18411A-4 Upper Gear Set
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        $1,138.99
        $956.49

        Mercruiser 43-18411A-4 Upper Gear Set Genuine OEM Mercury-Mercruiser part. For use w/ heavy duty 1.50 gears only. The HD 1.50 drive gear has a stepped bearing surface requiring the use of a special...

      • Mercruiser 43-45814A-5 Upper Gear Set - 1.65:1
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        $572.99
        $481.49

        Mercruiser 43-45814A-5 Upper Gear Set - 1.65:1 Genuine OEM Mercury-Mercruiser part. Fits: MC‑I, R, MR, Alpha One & Gen II (s/n 0K999999 and below) (1970‑1997) 24-24 Teeth 1.65/1.62 Ratio .Special...

      • Mercruiser 43-55778A-3 Upper Gear Set - 1.98:1
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        $582.99
        $489.99

        Mercruiser 43-55778A-3 Upper Gear Set - 1.98:1 Genuine OEM Mercury-Mercruiser part. Fits: MC‑I, R, MR, Alpha One & Gen II (s/n 0K999999 and below) (1970‑1997) 20-24 Teeth 1.98/1.94 & 2.40 Ratio ...

      • Mercruiser 43-828073A-1 Reverse Gear Kit
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        $191.99
        $168.99

        Mercruiser 43-828073A-1 Reverse Gear Kit Genuine OEM Mercury-Mercruiser part. Fits: Alpha I Gen II 21 Teeth Application: Alpha One (Gen II) 1998 & Up - s/n 0L100040 & up Alpha One (Gen II)...

      • Mercruiser 43-853641A-2 Upper Gear Set - 1.47
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        $631.99
        $530.99

        Mercruiser 43-853641A-2 Upper Gear Set - 1.47 Genuine OEM Mercury-Mercruiser part. Fits: Alpha One Gen II (s/n 0L000040 and above) (1998 & newer) 22-20 Teeth 1.47 Ratio .Special Order Item: This...

      • Mercruiser 43-853642A-2 Upper Gear Set - 1.94/2.4
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        $861.99
        $723.99

        Mercruiser 43-853642A-2 Upper Gear Set - 1.94/2.4 Genuine OEM Mercury-Mercruiser part. Fits: Alpha One Gen II (s/n 0L000040 and above) (1998 & newer) and Vazer drive 20-24 Teeth 1.94 & 2.40 Ratio...

      • Mercruiser 43-853643A-2 Upper Gear Set - 1.81
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        $556.49
        $467.49

        Mercruiser 43-853643A-2 Upper Gear Set - 1.81 Genuine OEM Mercury-Mercruiser part. Fits:  Alpha One Gen II (s/n 0L000040 and above) (1998 & newer) & Vazer drive 17-19 Teeth 1.81 Ratio Alpha One Gen...

      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.

      Shop for Your MerCruiser Gearcase and Drive Part Needs

      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. You can depend on Wholesale Marine to provide high quality Mercury outboard parts and Mercury sterndrive parts from the top brands in the industry. 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 Wholesale Rewards Program, shipping perks, and price match guarantee are added bonuses to ensure each and every customers’ satisfaction. Remember you can always depend on Wholesale Marine for high quality Mercury outboard parts and Mercury sterndrive parts from the top brands in the industry. So plan to call us for all your boating needs today!