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  1. #1

    Default 12' XLV Replacing drive shaft

    So I did a thing. Broken drive shaft. Didn't hit anything. Went to pull up my buddy and it turned loose. Engine rpms spiked for a quick second.

    When I first bought the boat (660 hours) I found that the 4 coupler bolts were loose. So alignment was checked and bolts were tightened. My shaft packing wasn't to tight because I have noticed it dripping a little more than normal (replacing the wax rope packing was on my to-do list).

    Anyways, any tips on repairing this. It seems pretty straight forward. Once the vdrive is out and prop is pulled the drive shaft should be able to slide right out from inside the boat right? Will the fuel tank need to be removed. For anybody that has done this job I'd love to hear any tips. I'm about to start labeling hose connections, bolt locations and electrical connectors

    This is a 2012 Moomba Mobius XLV (vdrive)

    Sent from my SM-S928U using Tapatalk

  2. #2
    Join Date
    Jan 2021
    Location
    Columbus, Ohio
    Posts
    1,365

    Default

    You shouldn't have to pull the vdrive on the tank.

    Unbolt the coupler and save for re-install.

    Loosen and disconnect your packing seal - I would replace the whole unit with a dripless.

    Remove prop from shaft

    Shaft should slide past the rudder and out.

    Check shaft bearings in strut possibly replace

    Install new shaft

    Install new dripless seal

    Install coupler and check specs with gauge.
    Align as needed

    Install prop

    Drink beer.
    2015 Moomba Mojo Surf Edition
    4,000lbs
    Manual Flow

  3. #3
    Join Date
    Sep 2005
    Location
    Claytor Lake, VA
    Posts
    604

    Default

    It's a tight working space but very doable. There is a post on here that I followed when I replaced the shaft packing with a dripless seal in my boat.
    The last step is very important plus you can afford more beer after doing it yourself.
    2005 Mobius LSV
    325 EFI

  4. #4

    Default

    Quote Originally Posted by VA LSV View Post
    It's a tight working space but very doable. There is a post on here that I followed when I replaced the shaft packing with a dripless seal in my boat.
    The last step is very important plus you can afford more beer after doing it yourself.
    Haha 100%!!

    What dripless did you go with?

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  5. #5
    Join Date
    Jan 2021
    Location
    Columbus, Ohio
    Posts
    1,365

    Default

    I went with Glide dripless
    2015 Moomba Mojo Surf Edition
    4,000lbs
    Manual Flow

  6. #6

    Default

    Quote Originally Posted by Holdmybeer View Post
    You shouldn't have to pull the vdrive on the tank.

    Unbolt the coupler and save for re-install.

    Loosen and disconnect your packing seal - I would replace the whole unit with a dripless.

    Remove prop from shaft

    Shaft should slide past the rudder and out.

    Check shaft bearings in strut possibly replace

    Install new shaft

    Install new dripless seal

    Install coupler and check specs with gauge.
    Align as needed

    Install prop

    Drink beer.
    Well I agree but the drive shafts I was looking at on waterskis.com are the shaft with coupler pressed on. They mention not to remove the coupler. Where are yall buying your parts from?

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  7. #7
    Join Date
    Jan 2021
    Location
    Columbus, Ohio
    Posts
    1,365

    Default

    Quote Originally Posted by johntmoseley606 View Post
    Well I agree but the drive shafts I was looking at on waterskis.com are the shaft with coupler pressed on. They mention not to remove the coupler. Where are yall buying your parts from?

    Sent from my SM-S928U using Tapatalk
    This is your choice, but I'm marking the shaft and coupler with a sharpie and separating.

    No way I would pull the tank for this. The new dripless comes with an install guide for pushing the shaft up through the hull not down.
    2015 Moomba Mojo Surf Edition
    4,000lbs
    Manual Flow

  8. #8
    Join Date
    Sep 2005
    Location
    Claytor Lake, VA
    Posts
    604

    Default

    I went with the OJ dripless seal.

    Skidim.com, skiboatpartsonline.com, myinboardmarine.com all sell the A.R.E shaft system. The coupler is self centering and is secured with a nut on the end and a set screw on the side even though it is a taper fit. Not a big deal to remove and reinstall it.
    2005 Mobius LSV
    325 EFI

  9. #9
    Join Date
    Jan 2021
    Location
    Columbus, Ohio
    Posts
    1,365

    Default

    My 2015 is keyed at the coupler.
    Not sure how you could mess it up and not get it to align back to design.
    2015 Moomba Mojo Surf Edition
    4,000lbs
    Manual Flow

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