Props vs Barnacles?

Discussion in 'General Maintenance/Repair Questions' started by gtfireftr, Aug 31, 2016.

  1. gtfireftr

    gtfireftr Member

    275
    Oct 9, 2014
    Westport MA
    1997 Sea Ray Sundancer 290
    Twin 4.3 liter w/Alpha Drives
    So I have been fighting more than one issue evidently..
    Got my port motor running finally, and went out this morning. Ran fine except it wouldn't rev over 3800. Stbd revved to 4200.
    So I decided to check props..... Trailered up the alpha's and I found moderate growth of barnacles on both props.
    Not a great deal on the blades, but lots on the hub and bottom of the blades.
    Could this cause my issue? Weather turned bad so I can't try her out.
    Hopefully this will help!!!!!!
    any input is greatly appreciated
     
  2. saopm

    saopm Member

    721
    Oct 6, 2010
    North Fork - Long Island, NY
    2007 340 Sundancer
    Mercury 8.1s Inboards
    I would say so. It doesn't take a lot of growth to cause performance issues on an Alfa drive.
     
  3. b_arrington

    b_arrington Active Member

    587
    Feb 21, 2007
    Setauket, NY
    270 Amberjack (2006)
    AB Ventus 9 VL RIB
    350 Mag MPI Horizon w/ BIII
    1998 Envinrude 15 HP 2-stroke
    Yes. I had similar moderate barnacle growth on my BIII props. After scraping them off (plus brush off light slime and a barnacle patch on the hull) I went from slow speeds / max 3600 rpm to 4400 rpm and normal speeds.
     
  4. gtfireftr

    gtfireftr Member

    275
    Oct 9, 2014
    Westport MA
    1997 Sea Ray Sundancer 290
    Twin 4.3 liter w/Alpha Drives
    Thanks..... I hope that is the case with me as well..... I will most likely find out on Friday........
     
  5. rbryn

    rbryn Member

    254
    May 27, 2009
    Wilmington, NC
    2003 260DA
    350Mag MPI Bravo® III (re-powered 2013)
    I keep an old bamboo spatula on the boat. Every time we go for a swim I break it out and scrape the barnacles off the prop and hub. We also paint the prop when we paint the outdrive, but it never lasts long. Even the smallest amount of barnacle growth on the prop will dramatically affect performance.


    Sent from my iPad using Tapatalk
     
  6. gtfireftr

    gtfireftr Member

    275
    Oct 9, 2014
    Westport MA
    1997 Sea Ray Sundancer 290
    Twin 4.3 liter w/Alpha Drives
    And yes it did......
    I scraped the props as best as I could. I got all that I could off. I took her out for a quick spin, and it was back to normal....
    It is amazing what a little growth will do.....
    I have never painted the props before, so I guess that will be on the agenda for next year....
    Thanks for the replies
     

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