Dwight:
This sounds so logical, why is it that we attempt so many different ways
and buy different products to do what antifouling paint does.....there
was nothing growing on the Micron 66 .... daaa! I'd gladly give up my
shiny prop for a 'marine growth free' prop. Then this problem is
solved......antifouling paint on the prop/shaft next season.
And to listers still following this thread, late last season, Dwight was
motoring AZURA back to the mooring and felt something was wrong.....he
said he didn't seem to have the boat speed he should have had with the
RPM's. He was right.....the mussel farm again effecting the performance
of the prop.
And to Bill and Joe, I was kidding about that underwater breathing
apparatus....thought a little levity was in order......although I take
seriously Rich's prayer meetings. I became a certified diver 40 years
ago, and am comfortable underwater, but can't hold my breath as long as
I used to.
Bob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
On 2013/01/07 5:15 PM, dwight veinot wrote:
Bob
You seem to have a possible answer that you've tested on your boat and at
your mooring: just make your prop and shaft black with Micron 66...some will
come off the blade faces and tips as a result of cavitation but the shaft
and hub should fair better...worth a try if you don't mind painting that
shiny prop of yours...no primer, just Micron 66
Dwight Veinot
C&C 35 MKII, Alianna
Head of St. Margaret's Bay, NS
-----Original Message-----
From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Robert
Abbott
Sent: January 7, 2013 4:50 PM
To: cnc-list@cnc-list.com
Cc: Eric Frank
Subject: Stus-List Prop Mussel Farm
Eric:
I used Micron 66 this season and I think the paint is
incredible.....after 5 months in the water, it didn't need a
cleaning/pressure wash at haulout....no growth of any kind.
My prop/shaft is another story......I have tried applying a marine grade
grease, last year I applied lanolin after heating the metal with a heat
gun,,,,,the stuff just melted onto the prop and resulted in a thick
coat.....no sign of the lanolin on haulout, but a harvest of mussels.
The mussels attach to the SS shaft so hard that where the shaft enter to
hull, the mussels gouge out the getcoat.....every Spring I fill with
West System resin, every Fall the mussels remove it.
I am betting the galvanized zinc spray paint at the hardware store is
the same as the Petit product.....if it won't damage the prop in any
way, it might be worth a try.
Getting Rich Knowles to suspend his prayer meetings at the club asking
for all the North West Arm mussels to attach to my prop might help as well.
Bob Abbott
AZURA
C&C 32 - 84
Halifax. N.S.
On 2013/01/07 4:09 PM, Eric Frank wrote:
Bob,
I have used the Petit product (Zinc Coat Barnacle Barrier) for the last
couple of years here in Buzzard's Bay, MA with mixed results. As others
report, I sanded the prop down to very clean bronze and then applied 3 coats
of the zinc paint from the spray can. I did wait about 2 weeks after
painting before launching. In the fall, the prop was covered with
barnacles. So last spring I scrapped off all the barnacles but did not sand
off all the old paint and then did a triple spray again, but only a few days
before launch. On top of that I smeared a very viscous lanolin, based on
the discussions on the list, and smoothed it out with a hot air gun. This
fall, the boat emerged from a full season in the water with virtually no
barnacles on the prop or the hull (which was painted with a new layer of
Micron 66). So I attributed the difference to the lanolin, which seemed to
be still present on the prop, as it feels slightly greasy. True, the engine
is hardly used at all because we
are
on a mooring and usually don't use it much at all unless the wind dies.
So it is interesting that Danny, only a few miles away, saw no growth with
just a bronze prop. - no paint or grease. It seems very difficult to
generalize from the very different reports.
Eric
Eric Frank
Cat's Paw
C&C 35 Mk II
Mattapoisett, MA
Date: Mon, 07 Jan 2013 14:54:48 -0400
From: Robert Abbott <robertabb...@eastlink.ca>
To: cnc-list@cnc-list.com
Subject: Stus-List Prop Mussel Farm
Message-ID: <50eb19f8.5080...@eastlink.ca>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
The topic is back.....last year, in an attempt to inhibit the growth of
mussels on the prop and prop shaft, I coated them with lanolin.....was
told or read this would help. When the boat was hauled in October, the
prop/shaft were completely encased in mussels, again. The growth has a
noticeable, negative effect on the performance of the prop later in the
season e.g. higher RPM's to attain same cruising speed when motoring.
After trying a few so called 'remedies', I am now convinced the only
effective way to keep the prop free of marine growth (mussels on mine)
is to dive a few times a season and physically remove them. Maybe I
need a few pounds of lead, my safety harness on and tethered to the
toerail and a few feet of hose the top end tied to the pushpit and me
breathing from the bottom end.
However, before I comtemplated something like that, there is one more
'remedy' I have heard/read about......it involves coating the prop/shaft
with "galvanized zinc spray paint". I have never seen this done and do
not know what effect it might have on the bronze prop (shouldn't be
negative but I'm not sure). There is never any marine growth on my
sacrificial zinc(s).
Has anyone heard of this? Anyone with any experience with this paint on
props?
Bob Abbott
AZURA
C&C 32 - 84
Halifax, N.S.
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