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  1. #1
    Join Date
    Aug 2007
    Location
    Toronto, Ontario
    Posts
    187

    Smile What a difference anew prop makes!

    I have a 2007 Outback. It came with the original 3-blade 13x13 OJ prop. I decided to get a backup prop. At the suggestion of this forum I bought a 13x12 ACME prop and installed it on the werkend.

    These are the improvements I have noticed:
    - the hole shot is about 50% better. I get up on one ski much faster.
    - I had to recalibrate all the ski speeds for perfect pass because the boat is now running at obout 200 rpm slower for any given speed.
    - the boat reaches ski speed faster which helps with short setup at the slalom course.
    - the top speed at WOT has increased by 4mph to 48.
    - the boat loses much less speed on tight turns.

    I didn't expect this much improvement from just a prop change!
    2007 Moomba Outback
    99.999% Slalom, 0.001% Wakeboarding

  2. #2
    Join Date
    Jun 2007
    Location
    Calgary Alta Canada
    Posts
    886

    Question

    Wow i wish i had tryed that when i bought a spare Oj prop. Its still in the box unused ,maybe i should sell it half jokingly.

  3. #3
    Join Date
    Apr 2009
    Location
    Coventry, CT
    Posts
    94

    Default

    I figured that your top end speed with the new prop would of decreased by a few MPH?

  4. #4
    Join Date
    Feb 2005
    Location
    Ottawa, Ontario, Canada
    Posts
    675

    Default

    Quote Originally Posted by Sharpie647 View Post
    I figured that your top end speed with the new prop would of decreased by a few MPH?
    If both props were of ideal design, yes, a lower pitch would lead to a slight loss of top speed. However, the older prop (despite being the factory default one) might have been poorly chosen and thus could have been slipping or cavitating a bit.

  5. #5
    Join Date
    Aug 2007
    Location
    Toronto, Ontario
    Posts
    187

    Smile

    I did not expect so much improvement, especially from both the bottom end and top end. Although the pitch is slightly less, the overall design must be quite a bit better. There is a lot more surface are with the new prop.
    2007 Moomba Outback
    99.999% Slalom, 0.001% Wakeboarding

  6. #6
    Join Date
    Apr 2008
    Location
    California
    Posts
    2,840

    Default

    C'mon Ed you can say it ... A...Ac...Acme! Feels better huh?! LOL!

    Seriously I've heard from many people that Acme's are better and will actually resolve some issues caused by the OJ's.
    2007 Mobius LSV

  7. #7
    Join Date
    Jun 2009
    Location
    Minneapolis, MN
    Posts
    386

    Default

    Quote Originally Posted by Laz View Post
    I have a 2007 Outback. It came with the original 3-blade 13x13 OJ prop. I decided to get a backup prop. At the suggestion of this forum I bought a 13x12 ACME prop and installed it on the werkend.

    These are the improvements I have noticed:
    - the hole shot is about 50% better. I get up on one ski much faster.
    - I had to recalibrate all the ski speeds for perfect pass because the boat is now running at obout 200 rpm slower for any given speed.
    - the boat reaches ski speed faster which helps with short setup at the slalom course.
    - the top speed at WOT has increased by 4mph to 48.
    - the boat loses much less speed on tight turns.

    I didn't expect this much improvement from just a prop change!
    I just ordered this same prop. I'm looking forward to seeing how it does. I was recommended it by Acme for running between 1-2k of ballast. Glad it worked out well for you, I will report back on mine in a few weeks when my boat is done.
    Sold my Moomba. Currently boat whoring.

    Set Ups - 09 CWB Transcend Platinum w/ 09 Ronix Cells (his) and 08 Liquid Force Angel w/ 08 Alloys (hers)

  8. #8
    Join Date
    Aug 2009
    Location
    Montana
    Posts
    2,265

    Default

    Quote Originally Posted by Laz View Post
    I have a 2007 Outback. It came with the original 3-blade 13x13 OJ prop. I decided to get a backup prop. At the suggestion of this forum I bought a 13x12 ACME prop and installed it on the werkend.

    These are the improvements I have noticed:
    - the hole shot is about 50% better. I get up on one ski much faster.
    - I had to recalibrate all the ski speeds for perfect pass because the boat is now running at obout 200 rpm slower for any given speed.
    - the boat reaches ski speed faster which helps with short setup at the slalom course.
    - the top speed at WOT has increased by 4mph to 48.
    - the boat loses much less speed on tight turns.

    I didn't expect this much improvement from just a prop change!
    Doesn't alot of it have to do with what altitude your running at too? I have the same boat (07 outback DD) and has the factory 3 blade. If altitude doesn't matter - I might buy the same prop if that much improvement. Billings MT is about 3400 feet above see level? Anybody have any input?
    2007 Moomba Outback - waiting for summer!

    Why Not? Play Hard! Get wet

  9. #9
    Join Date
    Jun 2007
    Location
    Calgary Alta Canada
    Posts
    886

    Question

    Alttitude is part of the equation in choosing a, prop. We are at 3500ft and props are and were selected by the dealer for this situation. Toronto is sea level so is this a fair comparrison?

  10. #10
    Join Date
    Jun 2007
    Location
    Calgary Alta Canada
    Posts
    886

    Smile

    Toronto is closer too sea level i meant to say.

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