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Thread: Alpha one gen 1 swap

  1. #1
    Join Date
    Aug 2016

    Default Alpha one gen 1 swap

    I have a 89 5.0 mercruiser, can I swap a 5.7 1.50 ratio outdrive in?

  2. #2
    Join Date
    Nov 2006


    An 89 5.0L could be a 1.62 if it is a 2 barrel carb. If it is a 4 barrel carb then it is most likely a 1.50 and then it will work fine. If it was a 1.62, by putting a 1.5 on it, you will need to put a smaller prop on to compensate.

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Sterndrive Engineering, Inc. (SEI) manufactures a stern drive designed to replace Mercury Marine's MerCruiser® Alpha One®, R, MR, Gen II and Bravo One® stern drives. MerCruiser® Alpha One, R, MR, Gen II and Bravo One® are trademarks of the Brunswick Corporation. SEI has no affiliation with the Brunswick Corporation. Consequently, any warranties governing products and or sold by Brunswick Corporation will not apply to products manufactured and or sold by SEI, or to products damaged due to the operation of an SEI product.