Sterndrive Engineering

      • SEI Yamaha 2 Stroke V4 Repl Lower Unit 2:1 25"
        $1,199.99

        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...

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      • SEI Yamaha 76° V6 4 Stroke 25" 2:1 Repl Lower Unit
        $1,199.99

        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 90­° V6 Repl Lower Unit 2:1 25"
        $1,199.99

        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"
        $1,199.99

        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 Alpha One & Bravo Hydraulic Port Hose
        $79.99

        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#...

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      • SEI OMC Cobra Conversion Kit
        $599.99

        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...

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