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Prop maintenance - bling

Discussion in 'Engines and Propulsion' started by Justin_NSA, Feb 4, 2019. Add this thread to a FAQ

  1. Justin_NSA

    Justin_NSA

    Joined Jul 7, 2004
    5,267 posts, 1,027 likes
    Hunter 30T
    US Cheney, KS
    I was reinstalling my batteries this weekend in the boat yard and contemplated my folding prop. Gori just recommends using white lithium grease on the teeth when it's on the hard. Nothing more.
    The prop sure looks grungy for such an expensive and important part. Does anyone who pulls their boat every year ever clean and/or polish your prop to restore it's like new look? I'm in freshwater so growth isn't really an issue. Purely cosmetic question really. Seems like boat owners' approaches to maintenance vary...

    Keeping Barnacles Off Your Propeller
     


  2. jssailem

    jssailem

    Joined Oct 22, 2014
    8,110 posts, 3,330 likes
    CAL 35 Cruiser
    US Salem, Moored Port Everett WA
    Why not if you have the boat on hard. A clean prop will improve your power experience.
     


  3. DJAY

    DJAY

    Joined Apr 16, 2018
    6 posts, 2 likes
    Hunter 31
    Irish Mist US Saylorville Lake
    A year ago, while on the hard I sanded the hard deposits (calcium salts of some kind?) off my Gori. All pretty and shiny. Greased the gears before launch. At haul out last fall the deposits had returned. This after six months in a reservoir that drains farmland. Lord only knows what the chemical makeup of that water(?) is. The deposits are quite thin and smooth, although not as smooth as the bare metal and they do not have a perceptible edge. I'll probably do it again.
     


  4. Rick486

    Rick486

    Joined Oct 1, 2007
    1,174 posts, 293 likes
    Hunter 44DS
    US Pt. Judith
    Power experience? :)
     


  5. Justin_NSA

    Justin_NSA

    Joined Jul 7, 2004
    5,267 posts, 1,027 likes
    Hunter 30T
    US Cheney, KS
    You sound like you are on a watershed lake just like us .
     


  6. NYSail

    NYSail

    Joined Jan 6, 2006
    1,934 posts, 147 likes
    Beneteau 423
    US Mt. Sinai, NY
    As in “under power”. A clean prop will perform better than a dirty one.
     


  7. RoyS

    RoyS

    Joined Jun 3, 2012
    430 posts, 151 likes
    Hunter 33
    US Bay Pointe, Quincy
    In salt water here with a max prop. I have been having good results with applying paste automobile wax after polishing.
     


  8. Justin_NSA

    Justin_NSA

    Joined Jul 7, 2004
    5,267 posts, 1,027 likes
    Hunter 30T
    US Cheney, KS
    Well, I think in the Spring before launch I'll be taking my metal polishing stuff with be out to the boatyard. I have a kit with 4 levels of compounds. I may try to wax it afterward. Since it's a boat, should I be using "turtle wax" ? :doh:
     


    Captain Larry-DH and jssailem like this.
  9. Gunni

    Gunni

    Joined Mar 16, 2010
    5,768 posts, 1,399 likes
    Beneteau 411 Oceanis
    US Annapolis
    I’ll be trying Osbourne’s Barnacle Dissolver this spring.
    https://store.pyiinc.com/products/barnacle-dissolver

    Previously scraped and sanded my extremely expensive Italian propeller. Switched to a brass wire wheel...that got the job done quick and I figure is less abrasive. A dusting of zinc chromate spray seems to keep the prop cleaner through the season.
     


    jssailem likes this.
  10. Captain Larry-DH

    Captain Larry-DH

    Joined Jun 14, 2010
    580 posts, 271 likes
    Quorning Dragonfly 1200
    US home
    That stuff is just as toxic and dangerous as acid barnacle cleaners, but more expensive. https://www.pyiinc.com/downloads/barnacle-dissolver/barnacle-dissolver-msds.pdf

    I just use a fine wire brush wheel on an angle grinder. No chemicals needed, just wear eye protection and dust mask. The whole job takes about 15 minutes and the machine does most of the work.
     


  11. kappykaplan

    kappykaplan

    Joined May 1, 2011
    909 posts, 163 likes
    Pearson 37
    US Lusby MD
    :plus:
     


  12. Dalliance

    Dalliance

    Joined Oct 6, 2007
    637 posts, 79 likes
    Hunter 1982 H30 Cherubini
    US Chicago (Burnham)
    I just get tarnish and a white scale build up on the prop and shaft. Have been cleaning it off in the spring with a wire brush, fine emery cloth and Brasso. I do that because I get satisfaction out of seeing a shiny bronze prop go in the water on launch day, not because I think I am getting any big performance improvement.

    I looked at a few prop coatings, but was unimpressed. Basically very expensive paint IMO and not all that critical here. A few years ago I tried putting a heavy coating of Lanocote on the prop. It was a chilly day, so I warmed it to liquid with a heat gun and brushed it on. It was kind of a gooy mess, but an interesting experiment. The prop stayed bright the first half of the season, then started to darken and scale, but there was much less scale at haul out.

    I think I’ll try auto paste wax this spring and see how that works.
     

    Attached Files:



    Last edited: Feb 20, 2019 at 9:38 PM
    Justin_NSA likes this.
  13. Justin_NSA

    Justin_NSA

    Joined Jul 7, 2004
    5,267 posts, 1,027 likes
    Hunter 30T
    US Cheney, KS
    Four years in the Marines and ROTC before that. I know Brasso!
     


    Dalliance, JamesG161 and jssailem like this.

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