Alpha drive Rear mount dimension

Discussion in 'Sterndrives' started by klims106, Apr 10, 2016.

  1. klims106
    Joined: Jul 2011
    Posts: 8
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Fort lauderdale, FL

    klims106 Junior Member

    Hello All,
    I need to design an adapter plate for an Electric motor to an Alpha drive. I would like to find the correct dimensions and or a detail drawing of the Bell Housing or the Inner plate of the drive to properly design my adapter.

    I specifically need:
    - Center to center dimension of the 2 Mounts
    - Shaft centerline Height Feet bottom surface
    - Shaft Length past the Mont center line

    Any help will be welcome.

    Klims
     
  2. Kailani
    Joined: Apr 2013
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    Location: Hawaii

    Kailani Senior Member

    You could start by importing the alpha and the engine drawings into your cad program from https://www.mercurymarine.com/en/us/documents/installation-drawings/ (I'm not totally sure of the accuracy. I've never checked these except the overall and mounting dimensions. I'm sure you could go to a Mercury dealer and give them $20 to measure one that's off a boat to be 100% sure.)
     
  3. CDK
    Joined: Aug 2007
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    Location: Adriatic sea

    CDK retired engineer

    Mercruiser drawing

    Does this help?
     

    Attached Files:

  4. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    You can get a used bellhousing for very cheap. That will give you the mounting legs to the transom shield and attachment points for the electric motor.
     
  5. klims106
    Joined: Jul 2011
    Posts: 8
    Likes: 0, Points: 1, Legacy Rep: 10
    Location: Fort lauderdale, FL

    klims106 Junior Member

    To All thanks you for all your responses. All are very good suggestions. CDK your drawing is exactly what I was looking for. Kaliani, I tried to look at the Mercruiser installation and I also found a lot of very good info. Gonzo at last resort I was going to buy a bell housing to get the dimension.

    I will need to get the Rear mount blocks anyway. Those are mounted with a Press fit in the bell Housing Correct?
     

  6. gonzo
    Joined: Aug 2002
    Posts: 13,775
    Likes: 434, Points: 93, Legacy Rep: 2031
    Location: Milwaukee, WI

    gonzo Senior Member

    Yes, they are press fit.
     
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