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  1. #1
    Join Date
    Nov 2004
    Posts
    163

    Default Saildrive pitting/corrosion

    Hello - Anyone refurbished the exterior of a saildrive

    Please advise the best way to clean up and ensure protection
    I am assuming sand down
    Use some kind of 'salt remover' any recommendations
    Then what to coat it with? Is a filler necessary?

    Thanks in advance

  2. #2
    Join Date
    May 2001
    Location
    North Wales, sailing Aegean Sea or Menai Strait
    Posts
    21,973

    Default Re: Saildrive pitting/corrosion

    I would abrade with progressively finer grades of wet and dry finishing with 600. If the pitting is very bad you could try filling them with JB Weld. The manufacturer's coating is essential, don't try to economise on that.
    Answers to some technical queries at new website http://coxeng.co.uk

  3. #3
    Join Date
    Nov 2009
    Location
    Home UK Midlands / Boat Croatia
    Posts
    20,368

    Default Re: Saildrive pitting/corrosion

    I sand mine down with coarse sandpaper 80 / 100 / 120 to remove old loose antifoul and key any bare metal (not that there is much of that these days) and then use a few coats of primer, Primocon or whatever, and a few coats of Trilux 33 antifoul. That lasts for a couple of years before it needs doing again. It seems to be doing the trick because my saildrive anodes last several years.

    Richard

  4. #4
    Join Date
    Aug 2003
    Location
    Swale/Medway
    Posts
    4,373

    Default Re: Saildrive pitting/corrosion

    Something like JBWeld sounds the job, after suitable prep work. Note that if your saildrive anode is firmly attached and doing its job, you should not get any pitting or corrosion, at all !! I am somewhat paranoid about this, and when I change the anode I always go to extra lengths to ensure the mating surfaces are very clean, the screws are as tight as poss plus using thread lock, and I paint antifouling over the screwheads and over a small area of the anode around each one to be as certain as I can be that the anode will stay put.
    New saildrive legs are frighteningly expensive!
    Keep up to date with 'East Coast Pilot' at www.eastcoastpilot.com

  5. #5
    Join Date
    Feb 2006
    Posts
    6,368

    Default Re: Saildrive pitting/corrosion

    Several years ago I had props with no anodes and one of my saildrives lost some of it's paint. I sanded with production paper then gave the bare patches several coats of epoxy. It was quite handy that a neighbours boat in the yard was having the hull epoxied and I had what was left in the paint tray after every coat, so the saildrive ended up with about eight coats. Still fine approx ten years later.

  6. #6
    Join Date
    Dec 2012
    Location
    Gone cruising
    Posts
    2,395

    Default Re: Saildrive pitting/corrosion

    Ours had no pitting, but if it did, I can highly recommend International Watertite for filling/fairing metal parts under water. Used it to fair the lead keel and fill some pitting on the aluminium rudder bearing housing. All still there.

    For the saildrive (and propeller), I've cleaned off the remainders of old paint with an abrasive nylon brush wheel on a power drill, then used this excellent aluminium etch primer and finally Velox plus antifouling.

    For touching up the gearbox, Volvo grey spray paint.


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