Changing from jet drive to outdrive.
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Changing from jet drive to outdrive.

  1. #1
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    Default Changing from jet drive to outdrive.

    I have a 21' Baker Tunnel hull set up with a dominator jet drive.
    What would it take to change it over and what drive would I want for a 5-600 hp Ford big block.
    Would I need to go to right side steering and controls?
    Would there be any downsides to this conversion?
    Any and all info and help would be greatly appreciated.
    Alan
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    Senior Member SoldHondaBoughtHondo's Avatar
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    If you like the boat a bunch, keep it and buy one with an out-drive.
    "A liberal paradise would be a place where everybody has
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    I like the way the boat rides and handles and am wondering if by going to a Bravo i will see speed, ride and handling gains over the jet.
    It seems like a good time since I am needing to do some transom work and the pump needs a major rebuild. I don't know much about outdrives except for reading some here. I would love some one with more knowledge to maybe help me decide the pros and cons.
    Thhanks, Alan
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    Senior Member SoldHondaBoughtHondo's Avatar
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    Does that model boat come with outdrive? Chances of it driving the same are pretty slim.I would think just the additional weight would upset the entire balance of the boat.
    "A liberal paradise would be a place where everybody has
    guaranteed employment, free comprehensive healthcare, free
    education, free food, free housing, free clothing, free
    utilities, and only law enforcement has guns. And believe it or
    not, such a place does, indeed, exist: It's called prison."

    Sheriff Joe Arpaio
    Maricopa County Sheriff's Office
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    I've only seen jets and OBs but I would love to see one with a outdrive and I wonder what all would be required to switch a boat from a jet to and outdrive too. Lots of going the other way like outdrive to jet and outboard to jet (which I just did). Good stuff. If you do try it, start a thread here so we can learn. Good luck......john
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    my brother took his 21' sleek craft jet and made it an outdrive, has been a lot of work. But the boat is 95% done he jsut needs to pick up his seats and put the carpet on the floor. one of the biggest problems he had was he had to raise the motor so high, so the back of the boat had to be built up higher and made strong. A Shorty drive would have helped but he used a King Cobra drive we had standard length. we a really anxious to see how it runs hopefully within a few weeks we can test it out. 468 BBC should push it right a long now hopefully near 90.
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    Thanks for the replies.
    I am sure that what I want to do is possible, I just need to find someone with the knowledge to get me on the right track.
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    [IMG]https://fbcdn-sphotos-f-a.akamaihd.n...84141197_o.jpg[/IMG]

    this was a jet, now has a king cobra with full hydraulic steering
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by maniac0586; 08-26-2013 at 07:56 PM.
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    Senior Member Hullshot's Avatar
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    Motor raised, new motor mounts made, measure and build up transom, find where the x dimension should be (, approximate ) find drive length (std,-1,-2,-3) that best meets height and cut and install?
    Yes it's gonna be a challenge but anything is doable?
    Be bet would be an XR drive with an Imco lower?
    Last edited by Hullshot; 09-12-2013 at 10:11 PM.
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  12. #10
    Senior Member obie's Avatar
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    Default jet to io

    The eliminator i have was a jet that was converted to a alpha. I run a 560 hp sbc in it and run around 95 at 5000' elev.It handles great and is by far my favorite of all the boats ive had. Would like to have a bravo but the alpha has held up for 6 yrs . I dont mash it out of the hole just when it gets plane.
    At the end of the day do u really wanna be seen driving a wacker?
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  13. #11
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    I converted my 24 Skater from outboard to twin I/O.

    IMO. I think you should use a blackhawk drive. It is a surfacing drive and a lot shorter than most other drives that way you can mount the engine lower in the boat.
    FormulaZR on the boards has a 21 Liberator and was talking about doing the same thing as you. You should talk to him.

    BTW, where are you located? FormulaZR and I are both in Texas.
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  14. #12
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    Quote Originally Posted by tmoore View Post
    I converted my 24 Skater from outboard to twin I/O.

    IMO. I think you should use a blackhawk drive. It is a surfacing drive and a lot shorter than most other drives that way you can mount the engine lower in the boat.
    FormulaZR on the boards has a 21 Liberator and was talking about doing the same thing as you. You should talk to him.

    BTW, where are you located? FormulaZR and I are both in Texas.
    Thanks, this is the input I need. I am trying to find the measurements for laying out
    the transom and finding engine placement.
    I work out of Waxahachie but live in Tyler. I would love to check out
    your boat and anyone else who has done this conversion.
    I have questions on how to shape the bottom when I glass in the intake hole
    along with numerous others.
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  15. #13
    Already miss the 310/562 2manymustangs's Avatar
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    Interesting thread... I have often wondered about conversions from JET hulls to an I/O...
    Pat Eason, the voice of reason...
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  16. #14
    Member tmoore's Avatar
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    Quote Originally Posted by BakerJetBBF View Post
    Thanks, this is the input I need. I am trying to find the measurements for laying out
    the transom and finding engine placement.
    I work out of Waxahachie but live in Tyler. I would love to check out
    your boat and anyone else who has done this conversion.
    I have questions on how to shape the bottom when I glass in the intake hole
    along with numerous others.
    First you will probably need to rebuild your transom. Most all jets I've seen don't have a thick stong transom that is needed for an I/O.
    Then you need to decide what drive you are using and where you want your propshaft centerline. Once you have that figured out, your crankshaft centerline is 21 13/16 inches above that. So if you want to run a surfacing or semi surfacing prop your engine will end up being pretty high unless you use a shortened lower or blackhawk.
    If you go with a bravo style drive I have a mercruiser drill jig you can use.

    The bottom I would "assume"... you would follow the existing shape all the way back.

    I live about 15 miles north of Denton and work in Arlington. I'd be happy to help any way I can and you can come check my boat out anytime.

    My buddy and I are currently working on an Eliminator bubble deck replacing stringers, transom , bulkheads, and pump setback. We're also building a 6.0 ls motor with an 8-71 blower for it.
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