Sterndrive Engineering

      • SEI SE128 complete replacement sterndrive for MerCruiser Bravo Three
        $5,095.00

        SEI SE128 Complete Sterndrive for MerCruiser Bravo Three The SEI SE128 Complete Sterndrive is an aftermarket replacement for MerCruiser Bravo Three drives. Featuring dual water intakes and rated for...

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      • SEI Mercury Four Stoke Replacement 2.33:1 20" Lower Unit
        $1,670.52
        $1,392.10

        SEI Mercury Four Stoke Replacement 2.33:1 20" Lower Unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number...

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      • SEI Yamaha V6 2 Stroke 1.81:1 30" Shaft Repl Lower Unit
        $1,670.52
        $1,392.10

        SEI Yamaha V6 2 Stroke 1.81:1 30" Shaft Replacement Lower Unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial...

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      • SEI Yamaha 2 Stroke V4 Repl Lower Unit 2:1 25"
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        $1,670.52
        $1,392.10

        SEI Yamaha 2 Stroke V4 Repl Lower Unit 2:1 25" Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready...

      • SEI Yamaha V6 2 Stroke 1.81:1 20" Shaft Repl Lower Unit
        $1,670.52
        $1,392.10

        SEI Yamaha V6 2 Stroke 1.81:1 20" Shaft Repl Lower Unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number...

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      • SEI Yamaha 76° V6 4 Stroke 25" 2:1 Repl Lower Unit
        $1,670.52
        $1,392.10

        SEI Yamaha 76° V6 4 Stroke 25" 2:1 Repl Lower Unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number...

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      • SEI Yamaha 76° V6 1.81:1 Repl Lower Unit
        $1,670.52
        $1,392.10

        SEI Yamaha V6 2 Stroke 1.81:1 25" Shaft Repl Lower Unit Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number...

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      • SEI Yamaha 90­° V6 Repl Lower Unit 1.86:1 25" Counter
        $1,953.72
        $1,628.10

        SEI Yamaha 90° V6 25" 1.86:1 Replacement Lower Unit - Counter Rotation Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your...

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      • SEI Yamaha 90­° V6 Repl Lower Unit 2:1 25"
        $1,670.52
        $1,392.10

        SEI Yamaha 90­° V6 Repl Lower Unit 2:1 25" Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready...

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      • SEI Yamaha 2 Stroke V4 Repl Lower Unit 2:1 20"
        $1,670.52
        $1,392.10

        SEI Yamaha 2 Stroke V4 Repl Lower Unit 2:1 20" Note for purchasing: You must verify your Gear Ratio. Call for application assistance if needed, and have your engine serial number ready...

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      • 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...

      • SEI Alpha One & Bravo Hydraulic Port Hose
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        $107.99
        $89.99

        SEI Alpha One & Bravo Hydraulic Port Hose These are replacement hoses for Mercruiser Alpha 1 and Bravo hydraulic trim cylinders. 9B-104-02 Replaces OEM# 98703A3 9B-121-02 Replaces OEM#...

      • SEI Complete S/S Trim Pump Assembly
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        $578.40
        $482.00

        SEI Complete S/S Trim Pump Assembly The SEI Trim Pump assembly features a stainless steel mounting bracket and works as a replacement for OE#865380A25

      • SEI OMC Cobra Conversion Kit
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        $790.80
        $659.00

        SEI OMC Cobra Conversion Kit The SEI is designed to replace 1986-1993 Cobra drives that shift in the lower unit. Does NOT replace King Cobra drives. If using a fuel injected motor with the shift...