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Author Topic:   Trim Tab & Outboard bracket paint
blavid posted 07-08-2003 09:02 AM ET (US)   Profile for blavid   Send Email to blavid  
I am geting ready to pull my boat out of the salt water (where I have a wet slip) and do some bottom cleaning. I have Micron CSC ablative paint on the hull, and it works marvelously! No barnacles in a year and a half, and it still looks freshly painted!

However, I just added a set of Lenco electric trim tabs in February (they were one of the best investments for the boat and have performed flawlessly...I highly recommend them). The installer coated them with a clear anti-fouling paint, but they seem to get a buildup of barnacles each month. I have been cleaning them myself in the water, but is there any good brand of anti-fouling paint to coat them with? Also, what's the best paint for the aluminum outboard bracket? (I think it's aluminum)

kingfish posted 07-08-2003 09:10 AM ET (US)     Profile for kingfish  Send Email to kingfish     

Glad to hear the Lencos solved your problems; I have Lencos on my Outrage 22 and I love them.

Your trim tabs are stainless steel, not aluminum. I am a fresh water boater most of the time, and part-time salt water, and the boat typically lives on the trailer, so I don't have the same conditions you do. I would still wonder though if stainless by itself wouldn't be better than anti-fouling paint? Just don't know. There are probably experts here on the site that could answer your question.

Good luck-


seasicknes posted 01-07-2004 08:57 PM ET (US)     Profile for seasicknes    
Did anyone answer this question ?


Morocco posted 01-14-2004 02:29 PM ET (US)     Profile for Morocco  Send Email to Morocco     
My diver is adamant that my tabs should simply have been painted with regular bottom paint when I installed them (with whatever prep the paint maker recommends for new stainless) -- he says most of the boats leave them unpainted 'because it looks cool' and that he spends an inordinate amount of time on the tabs because of that. The tops DO grow a lot of stuff pretty fast. The part of the hinge that is screwed to the hull was painted with West Marine Bottom Pro to match the surrounding hull (it was acetoned then scored with a light sanding then reacetoned if I recall) and it has so far performed as well as the surrounding paint in terms of adhesion and anti-fouling.

Good luck with your Lencos. Mine have performed well, except for the time the control box exploded and filled the cockpit with smoke. (see earlier thread under my name for that tale).

I don't know the answer to the alum. bracket question.

blavid posted 01-14-2004 07:33 PM ET (US)     Profile for blavid  Send Email to blavid     
I forgot that I asked this question 6 months ago!

Anyway, I have been told not to use regular bottom paint (such as most of the cooper based bottom paints out there) because they will increase the risk of galvanic corrosion due to the different metals in the paint vs. the aluminum/stainless steel.

I should use non-copper based paints such as Interlux Veridian (silicone based) or Trilux Prop & Drive Paint (after a proper tiecoat layer).

John W posted 01-14-2004 09:17 PM ET (US)     Profile for John W  Send Email to John W     
You CAN paint your stainless trim tabs with copper based bottom paint. Any galvanic corrosion will just deteriorate your zinc's a little faster. It's a good idea to put zincs on your tabs as well, though.

Your motor bracket (or any aluminim) is where you can get a bad reaction between the copper & the aluminum, I'm told. That clear, tin based paint is reccommended & will work well, but it seems to be effective no more than a year. When I kept my boat in the water I would pull it every six months or so, wash the bracket and add a few more spray coats of that tin based spray paint to the metal sections.

It seems that barnacles attach more to metal parts & running gear more than to fiberglass sections no matter what they're painted with, but I don't understand why that would be.


Morocco posted 01-15-2004 02:21 PM ET (US)     Profile for Morocco  Send Email to Morocco     
I did install zincs on my lencos -- simply measured to a point in the centerline about 4 inches from the outboard trailing edge of each tab and drilled a 1/4 hole to fit the threaded post of 1/2 of a 3 inch 'clamshell' zinc.

I mounted them with the zinc on the upper surface so the 'lifting surface' (the bottom) of the tab has only the 1/2 inch long threaded bolt and locknut in the water flow.

I change them about every 6 months, when they get down to about 1 inch or so in diameter (I am in a full time salt water slip.)

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