Skip to content
SEI Marine will be closed December 23rd – January 7th for holidays
SEI Marine will be closed December 23rd – January 7th for holidays

Mercruiser Alpha One Gen I/II Sterndrives & Bravo Replacement Drives

Aftermarket replacement drives for Mercruiser Alpha One Gen I Sterndrives, Mercruiser Alpha One Gen II Sterndrives & Mercruiser Bravo. Lower Units, Upper Units, Complete Drives and Counter Rotation.

Filters

€
€
  • SE116, LOWER (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116, LOWER (Replaces Mercruiser Gen II)

    SEI Marine
    €1.177,60 - €1.177,60
    €1.177,60
    €1.177,60 - €1.177,60
    €1.177,60
    In stock

    We are generally able to ship the following business day however, during the summer there may be a delay. We will notify you by email of the curren...

    View full details
  • SE106, LOWER (Replaces Mercruiser Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106, LOWER (Replaces Mercruiser Alpha One)

    SEI Marine
    €1.090,20 - €1.090,20
    €1.090,20
    €1.090,20 - €1.090,20
    €1.090,20
    In stock

    Please click here for application assistance. We are generally able to ship the following business day.We will notify you by email of the current...

    View full details
  • SE116 1.47 Complete (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116 1.47 Complete (Replaces Mercruiser Gen II)

    SEI Marine
    €2.180,40 - €2.180,40
    €2.180,40
    €2.180,40 - €2.180,40
    €2.180,40
    In stock

    Ships in two boxes. Does not Include Complete Install Kit or Anode Kit. Please see related items below. We are generally able to ship the following...

    View full details
  • SE106 1.47 Complete (Replaces Mercruiser's Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106 1.47 Complete (Replaces Mercruiser's Alpha One)

    SEI Marine
    €2.005,60 - €2.005,60
    €2.005,60
    €2.005,60 - €2.005,60
    €2.005,60
    In stock

    Please click here for application assistance. Replaces most Mercruiser Sterndrives 228 HP and up from 1974-1990. Ships in two boxes. Comes with ...

    View full details
  • SE128 Lower 1.65 Ratio (Replaces Bravo Three® Lowers) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE128 Lower 1.65 Ratio (Replaces Bravo Three® Lowers)

    SEI Marine
    €1.881,40 - €1.881,40
    €1.881,40
    €1.881,40 - €1.881,40
    €1.881,40
    Low stock

    SE128 Lower 1.65 RatioFits Bravo Three® 1.65 Ratio OE #1656-8866A36 Not a replacement for Bravo X,XR or XZ drives. Has newer style case with the ...

    View full details
  • SE116 1.81 Complete (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116 1.81 Complete (Replaces Mercruiser Gen II)

    SEI Marine
    €2.180,40 - €2.180,40
    €2.180,40
    €2.180,40 - €2.180,40
    €2.180,40
    In stock

    Ships in two boxes. Does not Include Complete Install Kit or Anode Kit. Please see related items below. We are generally able to ship the following...

    View full details
  • SE116, UPPER 1.47 (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116, UPPER 1.47 (Replaces Mercruiser Gen II)

    SEI Marine
    €1.090,20 - €1.090,20
    €1.090,20
    €1.090,20 - €1.090,20
    €1.090,20
    In stock

    The 1.47 ratio replaces the 1.5 ratio

  • SE116, UPPER 1.81 (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116, UPPER 1.81 (Replaces Mercruiser Gen II)

    SEI Marine
    €1.090,20 - €1.090,20
    €1.090,20
    €1.090,20 - €1.090,20
    €1.090,20
    In stock

    The 1.81 ratio replaces the 1.84 ratio We are generally able to ship the following business day however, during the summer there may be a delay. ...

    View full details
  • SE106 1.81 Complete (Replaces Mercruiser's Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106 1.81 Complete (Replaces Mercruiser's Alpha One)

    SEI Marine
    €2.005,60 - €2.005,60
    €2.005,60
    €2.005,60 - €2.005,60
    €2.005,60
    In stock

    Please click here for application assistance. Replaces most Mercruiser Sterndrives 165-205 HP and up from 1976-1990. Typically used on V6 engine...

    View full details
  • SE106, UPPER 1.47 (Replaces Mercruiser Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106, UPPER 1.47 (Replaces Mercruiser Alpha One)

    SEI Marine
    €1.002,80 - €1.002,80
    €1.002,80
    €1.002,80 - €1.002,80
    €1.002,80
    In stock

    Please click here for application assistance. The 1.47 ratio also replaces the 1.5 ratio Comes with a 9-9/16 new style input yoke. We are general...

    View full details
  • SE128 Complete 2.43 Ratio (Replaces Bravo Three®) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE128 Complete 2.43 Ratio (Replaces Bravo Three®)

    SEI Marine
    €4.066,40 - €4.066,40
    €4.066,40
    €4.066,40 - €4.066,40
    €4.066,40
    In stock

    SE128 2.43 Complete Replaces Mercruiser Bravo Three® 2.43Ratio Dual Water Intakes. OE# 5441700TP Not a replacement for Bravo X,XR or XZ drives. Rat...

    View full details
  • SE128 Lower 2.43 Ratio (Replaces Bravo Three® Lowers) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE128 Lower 2.43 Ratio (Replaces Bravo Three® Lowers)

    SEI Marine
    €1.881,40 - €1.881,40
    €1.881,40
    €1.881,40 - €1.881,40
    €1.881,40
    Low stock

    SE128 LowerFits Bravo Three® 2.43 RatioNot a replacement for Bravo X,XR or XZ drives. Has newer style case with the oil recirculation system toward...

    View full details
  • SE121 Upper 30/23 Tooth Count(Replaces Bravo Upper) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE121 Upper 30/23 Tooth Count(Replaces Bravo Upper)

    SEI Marine
    €2.309,20 - €2.309,20
    €2.309,20
    €2.309,20 - €2.309,20
    €2.309,20
    Low stock

    SE121 Upper 30/23 Tooth CountFits Bravo 1 1.65 RatioFits Bravo 2 2.20 RatioFits Bravo 3 2.20 and 2.43 Ratio'sNot a replacement for Bravo X,XR or XZ...

    View full details
  • SE116 2.00 Complete (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116 2.00 Complete (Replaces Mercruiser Gen II)

    SEI Marine
    €2.180,40 - €2.180,40
    €2.180,40
    €2.180,40 - €2.180,40
    €2.180,40
    In stock

    Ships in two boxes. Does not Include Complete Install Kit or Anode Kit. Please see related items below. This item is to replace 2.00 Ratio drives ...

    View full details
  • SE116 1.62 Complete (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116 1.62 Complete (Replaces Mercruiser Gen II)

    SEI Marine
    €2.180,40 - €2.180,40
    €2.180,40
    €2.180,40 - €2.180,40
    €2.180,40
    In stock

    Ships in two boxes. Does not Include Complete Install Kit or Anode Kit. Please see related items below. We are generally able to ship the following...

    View full details
  • SE116, COUNTER ROTATING LOWER (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116, COUNTER ROTATING LOWER (Replaces Mercruiser Gen II)

    SEI Marine
    €1.352,40 - €1.352,40
    €1.352,40
    €1.352,40 - €1.352,40
    €1.352,40
    In stock

    To replace Counter Rotation units only. Do not use for standard rotation. We are generally able to ship the following business day however, during ...

    View full details
  • SE116, UPPER 1.62 / 2.0 (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116, UPPER 1.62 / 2.0 (Replaces Mercruiser Gen II)

    SEI Marine
    €1.090,20 - €1.090,20
    €1.090,20
    €1.090,20 - €1.090,20
    €1.090,20
    In stock

    The 1.62 ratio replaces the 1.65 and the 2.0 ratio

  • SE116, UPPER 1.94 / 2.40 (Replaces Mercruiser Gen II) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE116, UPPER 1.94 / 2.40 (Replaces Mercruiser Gen II)

    SEI Marine
    €1.090,20 - €1.090,20
    €1.090,20
    €1.090,20 - €1.090,20
    €1.090,20
    In stock

    The 1.94 ratio replaces the 1.98 and the 2.4 ratios We are generally able to ship the following business day however, during the summer there may ...

    View full details
  • SE106 1.94 Complete (Replaces Mercruiser's Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106 1.94 Complete (Replaces Mercruiser's Alpha One)

    SEI Marine
    €2.005,60 - €2.005,60
    €2.005,60
    €2.005,60 - €2.005,60
    €2.005,60
    In stock

    Please click here for application assistance. Ships in two boxes. Comes with a 9-9/16 new style input yoke. Does not include Complete Install Kit...

    View full details
  • SE106 1.62 Complete (Replaces Mercruiser's Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106 1.62 Complete (Replaces Mercruiser's Alpha One)

    SEI Marine
    €2.005,60 - €2.005,60
    €2.005,60
    €2.005,60 - €2.005,60
    €2.005,60
    In stock

    Please click here for application assistance. Replaces most Mercruiser Sterndrives 205 HP from 1983-1990. Ships in two boxes. Comes with a 9-9/1...

    View full details
  • SE108, COUNTER ROTATING LOWER (Replaces Mercruiser Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE108, COUNTER ROTATING LOWER (Replaces Mercruiser Alpha One)

    SEI Marine
    €1.265,00 - €1.265,00
    €1.265,00
    €1.265,00 - €1.265,00
    €1.265,00
    Low stock

    Please click here for application assistance. To replace Counter Rotation units only. Do not use for standard rotation. We are generally able to...

    View full details
  • SE106, UPPER 1.81 (Replaces Mercruiser Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106, UPPER 1.81 (Replaces Mercruiser Alpha One)

    SEI Marine
    €1.002,80 - €1.002,80
    €1.002,80
    €1.002,80 - €1.002,80
    €1.002,80
    In stock

    Please click here for application assistance. The 1.81 ratio also replaces the 1.84 ratio Comes with a 9-9/16 new style input yoke. We are genera...

    View full details
  • SE106, UPPER 1.94 (Replaces Mercruiser Alpha One) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE106, UPPER 1.94 (Replaces Mercruiser Alpha One)

    SEI Marine
    €1.002,80 - €1.002,80
    €1.002,80
    €1.002,80 - €1.002,80
    €1.002,80
    In stock

    Please click here for application assistance. The 1.94 ratio also replaces the 1.98 ratio Comes with a 9-9/16 new style input yoke. We are genera...

    View full details
  • SE128 Complete 2.20 Ratio (Replaces Bravo Three®) - SEI Marine - Mercruiser, OMC Cobra, Mercury, Yamaha, Johnson/Evinrude Replacement

    SE128 Complete 2.20 Ratio (Replaces Bravo Three®)

    SEI Marine
    €4.066,40 - €4.066,40
    €4.066,40
    €4.066,40 - €4.066,40
    €4.066,40
    Low stock

    SE128 2.20 Ratio Complete Replaces Mercruiser Bravo Three 2.20 Ratio Dual Water Intakes. OE# 5441500TP Not a replacement for Bravo X,XR or XZ drive...

    View full details