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ENGINE PROBLEM MERCRUSER

  • 23-07-2012 05:13PM
    #1
    BIG-SLICK-POKER
    Registered Users, Registered Users 2 Posts: 4,418 ✭✭✭


    I have a 4.3litre V6 Mercury Mercruiser Thunderbolt V Ignition Engine with and an alpha one leg that has gone to heaven :) . Im loooking to replace with a 3.0 mercruiser alpha 1 inboard that came off a bayliner ..

    Anyone know if they match up


Comments

  • #2
    fergal.b
    Moderators, Motoring & Transport Moderators, Sports Moderators, Paid Member Posts: 6,385 Mod ✭✭✭✭fergal.b


    Are you looking to change the engines as well as the outdrive or just the outdrive.


  • #3
    Hifive
    Registered Users, Registered Users 2 Posts: 495 ✭✭Hifive


    The gearing on the outdrives will be different so you will have to replace both engine and drive, however if the original drive is OK there would be a market for it.
    Engine mounts will also have to be moved. Also I think the rev counter will read wrong although some units can be reset to suit different cylinder configurations. V8, V6, I4 etc.
    What happened the original engine, frost damage?


  • #4
    fergal.b
    Moderators, Motoring & Transport Moderators, Sports Moderators, Paid Member Posts: 6,385 Mod ✭✭✭✭fergal.b


    Also I think the alpha 1 ran from 1984-1990 on the 3 lt with a 1.98 gear ratio and the 4.3 lt came in 1991 with a alpha 1 generation 2 with a 1.81 gear ratio.

    The alpha 1 gear case looks like this.

    BM-Alpha-One-1984-thru-1992-upper-gear-case-drive.jpg

    And the Gen 2 looks like this "they are not interchangeable for one the gear shift is different"


    BM-Alpha-one-generation-2-upper-gearcase.jpg

    A1G2 gen2shift.jpg A1 gen1shift.jpg

    Here is a alpha 1 gen 2 outdrive for sale if you need one:D http://www.donedeal.ie/for-sale/boatextras/3279557



    .


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