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| Title: | SAILING |
| Notice: | Please read Note 2.* before participating in this conference |
| Moderator: | UNIFIX::BERENS |
|
| Created: | Wed Jul 01 1992 |
| Last Modified: | Mon Jun 02 1997 |
| Last Successful Update: | Fri Jun 06 1997 |
| Number of topics: | 2299 |
| Total number of notes: | 20724 |
487.0. "Barnacles on lower unit" by SPGOPS::ALINSKAS () Tue Feb 17 1987 16:59
I have an outboard for an auxiliary. It's mounted through the hull so there
is no way to tilt it up when you're moored. Last season I had a really bad
barnacle build up. I scraped them off twice, but with them came most of the
paint on the lower unit. Between the barnacles and the missing paint I have
a pretty sad state of affairs right now. The boat is kept in Greenwich Bay, R.I.
The people that tuned and winterized it said that this occurred because there
was no zinc bar, the kind you attach to the lower unit under the water level,
so that the zinc bar corrodes as opposed to your lower unit. (Several dollars
vs. several $K). The lack of the zinc caused corrosion which in turn caused
the barnacles to grow there. This doesn't sound like it'll wash.
I'm going to try this paint kit called Alumigard (sp). Basically, you apply
paint stripper, then a couple of primers and then this paint.
I know that boat bottom paint on aluminum is an absolute (my favorite
vodka) no-no!!!!!!! Has anyone tried this Alumigard stuff (on their lower unit,
of course)?, and does anyone have any ideas on keeping the lower unit clean
of barnacles and other things like that. Any help would be appreciated.
Linas
| T.R | Title | User | Personal
Name | Date | Lines |
|---|
| 487.1 | | GRAMPS::WCLARK | Walt Clark | Tue Feb 17 1987 17:34 | 11 |
| Most of the tin based antifouling paints are safe for metal. I think
the yard was confusing electrolysis with antifouling (as regards
the zinc) unless they think the loss of paint on the unit was a
result of aluminum deterioration and loss of protective paint
and the resultant growth. In either case, zincs are important
to prevent destruction of your outboard from electrolysis. Maybe
the zinc will indirectly help reduce growth by keeping the aluminum
and paint job (antifouling) in tact.
Walt
|
| 487.2 | Use an outdrive paint & Zincs | TALLIS::KLOTZ | | Mon Feb 23 1987 15:53 | 21 |
| Any good power boat store carries anti-fouling paint for out drives.
There are many brand names inc. MercCrusier, OMC, etc...
I have used the MercCruiser for 5 years now with no problems at
all regarding any growth.
The ZINCS are a must for galvanic corrosion.
MercCrusier also makes a thing called a Merc-Cathode which is a great
little device to protect against electrolosis - it senses any
electrical current in the water & sets up an opposing current to
counteract it. It is said to be the best system for this purpose
on the market - all I can say is after 3 years I had the best looking
outdrive at my marina.
You might think that this is not needed if you are on a mooring
-- it depends upon how close you are to some one at a dock using
shore power with a bad elcetrical system.
Happy Sailing,
Lou
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