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  1. 02-12-2021, 05:19 PM #9
    larry_arizona's Avatar
    larry_arizona
    larry_arizona is offline Senior Member
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    May 2018
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    Default 2 speed transmission outboards

    The drag of a 4th out drive is exponential.

    The 7 marines are badass GM LSA engines for sure.

    Considering GM is no longer manufacturing the LSA engine blocks may have something to do with 7 marine stopping.

    I believe the 557’s were $80k and 627’s were $90k so $77k for the 600 is reasonable.

    Two speed trans, lower unit steering, multi prop are all upgrades.

    1800 hp with 3 out drives is faster than 1800hp and 4 out drives.


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    Last edited by larry_arizona; 02-12-2021 at 05:26 PM.
    2021 Supra SA 400
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