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Thread: SEI Outdrives

  1. #1

    Default SEI Outdrives

    Has any body converted their OMC outdrive to the SEI 116.
    Any positive or negative experiences with this change over, or SEI quality?

  2. #2
    Join Date
    May 2010
    Location
    DC Burbs/Maryland Eastern Shore
    Posts
    822

    Default Re: SEI Outdrives

    Why? Just find a used mercruiser alpha drive for a couple hundred bux and dump the OMC entirely. It's a straight up swap. There are hundreds of thousands of Mercruiser drives out there for cheap and parts are a bazillion times easier to get and everyone knows how to repair them.
    Practicing the ancient art of ren-ching

  3. #3
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    7,499

    Default Re: SEI Outdrives

    You may not know this:
    Your Cobra drive is a candidate for a Volvo Penta SX or DP-S conversion just as easily as it is for the SEI or Merc conversion.
    The SX or DP-S gets you away from Dog Clutch gear engagement, completely away from the ESA and related cable linkage, etc, and into smooth V/P Cone Clutch gear engagement.

    With the SEI or Merc, you'll need to retain the ESA, and the cable linkage system..... and at the end of the day, you'll still have Dog Clutch engagement.

    Just a friendly FYI for you.


    Edit; if you were to do the SX conversion, this leaves you wide open for the Duo Prop (DP-S) lower unit down the road.
    Depending on hull size/weight, the Duo Prop can be compared to that of adding another 80 horse power or so.
    This cannot be done with either the SEI or Merc A drive.

    .
    Last edited by RicardoMarine; 09-27-2012 at 12:04 PM.
    Rick ... aka Ricardo
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP's

  4. #4

    Default Re: SEI Outdrives

    Quote Originally Posted by o2batsea View Post
    Why? Just find a used mercruiser alpha drive for a couple hundred bux and dump the OMC entirely. It's a straight up swap. There are hundreds of thousands of Mercruiser drives out there for cheap and parts are a bazillion times easier to get and everyone knows how to repair them.
    I'm confused, are you saying that a Mercruiser will bolt right up to my exsisting OMC transom set up?

  5. #5
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    7,499

    Default Re: SEI Outdrives

    Quote Originally Posted by New Boater View Post
    Quote Originally Posted by [B
    o2batsea][/B] Why? Just find a used mercruiser alpha drive for a couple hundred bux and dump the OMC entirely. It's a straight up swap. There are hundreds of thousands of Mercruiser drives out there for cheap and parts are a bazillion times easier to get and everyone knows how to repair them.
    I'm confused, are you saying that a Mercruiser will bolt right up to my exsisting OMC transom set up?
    No... the Merc A drive will not bolt right up.
    I think that he's suggesting to replace the entire OMC Cobra with an entire Merc A drive.... I.E., out drive, transom unit, inner transom plate, Merc Y-pipe, Merc flywheel cover, etc.

    The SEI kit is a conversion, whereby you use the SEI Merc Knock-Off drive, and the SEI conversion kit in order to retain the OMC tansom unit, gimbal bell and hydraulic cylinders.

    All three of these (Cobra, SEI and Merc A) are Dog Clutch drives, btw.


    .
    Rick ... aka Ricardo
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP's

  6. #6
    Join Date
    Mar 2009
    Location
    Portland, Oregon,
    Posts
    7,499

    Default Re: SEI Outdrives

    Here's the conversion kit for either the SEI knock-off, or the Merc A drive to Cobra.
    Rick ... aka Ricardo
    Portland, Oregon
    28' SDN F/B w/ twin Volvo Penta 5.7L DP's

  7. #7

    Default Re: SEI Outdrives

    the Duo Prop can be compared to that of adding another 80 horse power or so.
    You forgot to mention that a DP-S is $7,950.00 and the SX is $7,212.00 and Transom Shield is $2,950.00

    So that's $10K to get this imaginary 80 extra horsepower.

  8. #8
    Join Date
    May 2010
    Location
    DC Burbs/Maryland Eastern Shore
    Posts
    822

    Default Re: SEI Outdrives

    Practicing the ancient art of ren-ching

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