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  1. #71
    Join Date
    May 2018
    Posts
    4,185

    Default

    I think a 16 fits a Moomba, but I recall prop burn is possible.


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    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  2. #72
    Join Date
    Aug 2017
    Posts
    1,382

    Default

    Quote Originally Posted by larry_arizona View Post
    I think a 16 fits a Moomba, but I recall prop burn is possible.


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    It “fits” but will definitely burn your gel.
    Would need to install a protective plate to guard against the burn.


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  3. #73
    Join Date
    May 2018
    Posts
    4,185

    Default

    Probably can just 5200 on a piece of stainless steel.


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    2021 Supra SA 400
    2018 Supra SA 400 (SOLD)
    Michigan

  4. #74
    Join Date
    Sep 2020
    Location
    Kansas City
    Posts
    105

    Default

    Thanks guys, I assumed there had to be a reason they went with a 15.5" instead of the 16".
    2021 Mojo

  5. #75

    Default

    I have the Acme 3591 with.105 cupping on my 21 SL 450 with 1.76 trans. We surf with full ballast, 800lbs of lead and a small crew weighing about 520lbs. Pitch is between 9.5 and 10.5 and speed is 11.2 or 11.4 mph. Elevation is 2820ft. RPM's vary a bit due to current and chop, but pretty consistently between 3450 and 3750. I get noticeable steering wheel shake at launch, which I assume is the force of the water the prop is sending past the rudder. Anyone else experiencing this?

    Also, coming off the throttle, right before neutral there is a small rattle (noise no vibration felt). No idea what this is but it is annoying me...worried there is something loose but can't see anything on the shaft and prop looks fine. Prop was refurbished and balanced. I have a second (new) 3591 that I could swap out I guess and see of that makes a difference, but maybe you all have some ideas?

    Cheers!

    Sent from my SM-G973W using Tapatalk

  6. #76
    Join Date
    Mar 2021
    Location
    South Georgia
    Posts
    819

    Default

    Are you sure your rudder is straight when you launch? I have sometimes noticed if I have it turned too far on initial launch I get a funny feeling. Lot of force hitting it on the side suddenly if it's a full throttle launch and it's (the steering wheel) turned.

    Sent from my moto z4 using Tapatalk
    2021 Moomba Makai
    Black Cherry Metal Flake & Fire Red
    Nibral OJ 15.5x15 Altitude/Wake prop w/1.76 trans v-drive
    Wet Sounds Rev 8's, 10's, & sub

  7. #77
    Join Date
    May 2017
    Location
    Alberta, Canada
    Posts
    186

    Default

    Quote Originally Posted by cwfehr View Post
    I have the Acme 3591 with.105 cupping on my 21 SL 450 with 1.76 trans. We surf with full ballast, 800lbs of lead and a small crew weighing about 520lbs. Pitch is between 9.5 and 10.5 and speed is 11.2 or 11.4 mph. Elevation is 2820ft. RPM's vary a bit due to current and chop, but pretty consistently between 3450 and 3750. I get noticeable steering wheel shake at launch, which I assume is the force of the water the prop is sending past the rudder. Anyone else experiencing this?
    I get this with mine also, very similar setup in terms of weight, elevation, rpm's. Not so much that the steering wheel is shaking but that the rudder itself is cavitating heavily and that that cavitation is moving up the steering cable and felt, to a degree, on the steering wheel.
    2021 Mojo, 6.2L Raptor 400/1.76, Acme 3407 15.5x13, G6, Flow3, 6500 lbs ballast
    2005 Mobius LSV (sold)
    Windermere Lake, B.C., 2800' Elevation
    2021 Mojo Mods

  8. #78

    Default

    In most cases the steering wheel will not be straight. You are right, if it is straight the effect is minimal relatively speaking.

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  9. #79
    Join Date
    May 2021
    Location
    Lake Tahoe
    Posts
    3

    Default

    I am looking for the measurement from the middle of shaft nut to hull from a Supra so I can make a decision on running a 16in prop on my 2021 Moomba max.

    If the measurements are the same or extremely close I would love to run a 16 inch prop.

    I’m at 6200ft and can use all the help I can get.
    2021 Moomba max
    2018 moomba max (sold)

  10. #80
    Join Date
    Nov 2016
    Location
    Knoxville, TN
    Posts
    1,166

    Default

    Quote Originally Posted by snowboardintahoe View Post
    2021 Moomba max.

    If the measurements are the same or extremely close I would love to run a 16 inch prop.

    I’m at 6200ft and can use all the help I can get.
    Read reply #72, you can, but you'll need to install a stainless plate to prevent prop burn. Dakota has a 21 Max.... I'd run like a 15.5x12 or 15.5x12.5 on it.
    2018 Supra SA400 aka The Ron Burgandy
    2011 Sea-Doo Wake 155
    2015 Mojo Surf, sold...2013 Axis A22 Recon Edition, sold...2010 Axis A22, sold...2007 Maxum 1800sr3, sold

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