Sterndrive Engineering

      • 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 Alpha One & Bravo Hydraulic Port Hose
        $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#...

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      • SEI Complete S/S Trim Pump Assembly
        $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

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      • SEI OMC Cobra Conversion Kit
        $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...

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      • SEI Mercruiser  Alpha 1 Propshaft 6 Jaw
        $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...

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      • SEI Mercury 2 Stroke 2.33:1 20" Replacement Lower unit
        $1,670.52
        $1,392.10

        SEI Mercury 2 Stroke 2.33:1 20" Replacement 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 Mercury 2 Stroke 2.07:1 Replacement Lower unit
        $1,670.52
        $1,392.10

        SEI 205-A20 Mercury 2 Stroke 2.07:1 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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