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Thread: 7.4L 454 Magnum - Can I use your sterndrives or lower gearbox's ????

  1. #1
    Join Date
    Sep 2009
    Posts
    5

    Default 7.4L 454 Magnum - Can I use your sterndrives or lower gearbox's ????

    Hi Guys,

    I need to know one way or another if I can use your complete sterndrive replacement or lower gearbox replacement for my 7.4L 454 magnum engine (1992)

    It has a bravo one leg.

    I have been told yes and no by two different people, one from SEI.

    Can someone let me know if I can, or if I cant, what other options do I then have???

  2. #2
    Join Date
    Nov 2006
    Posts
    661

    Default

    What you need is a bravo drive. We do not make a complete bravo but we do have a lower that will work for you (SE121). If you are referring to our complete Alpha style (SE116) then no, you cannot use that with a 7.4L.

    Tech Support

  3. #3
    Join Date
    Sep 2009
    Posts
    5

    Default great

    thats great, thanks for that.

    Only my lower needs to be replaced, was just considering a full swap though.

    What is the difference between the SE121 and the SE122, is it just the water intakes, and why would I choose 1 over the other>???

  4. #4
    Join Date
    Sep 2006
    Posts
    551

    Default

    Yes, the difference is the water intakes. If you need a low water intake then you would choose the 122. If you do not need a low water intake then you would choose the 121. If you currently do not have low water intake then get the 121. If you get the 122 you might have problems with sucking up sand if you beach the boat.

    Tech support

  5. #5
    Join Date
    Sep 2009
    Posts
    5

    Default thanks

    Hi,

    thanks for that, appreciate it.

    One more question, then time to order!

    I am not sure what year model my engine/drive is, any chance you can tell me???

    engine serial is 0f002118 and outdrive serial is 0f002119

    I believe its a 1992 but I am not sure.

    If it were a 91 or earlier, I see its still compatible but needs to be modified, what modifcations need to be made and do you guys do them or would I have to?

    thanks

  6. #6
    Join Date
    Sep 2009
    Posts
    5

    Default can anyone help???

    anyone have any ideas on above post please???

  7. #7
    Join Date
    Sep 2006
    Posts
    551

    Default

    I am not sure of the year of your drive. If it is a 1991 or older you just need to plug the oil hole with some silicone or a set screw. We do not to it, so you would have to.
    To verify if you have the oil hole or not, just pull the lower off and look for a small o-ring towards the front of the lower unit. It is about 3/8 inch OD.

    Tech Support

  8. #8
    Join Date
    Sep 2009
    Posts
    5

    Default

    perfect, thanks, ordering now, hopefully alll goes well.

    thanks again for your help

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115 S. Forest Lakes Blvd.
Oldsmar, FL 34677

tel: 813.925.7127
fax: 813.925.7064


Sterndrive Engineering, Inc. (SEI) manufactures a stern drive designed to replace Mercury Marine's MerCruiserŽ Alpha OneŽ, R, MR, Gen II and Bravo OneŽ stern drives. MerCruiserŽ Alpha One, R, MR, Gen II and Bravo OneŽ 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.