Prop and propshaft antifouling - SailNet Community
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Prop and propshaft antifouling

On my last boat I didn't worry too much about putting antifouling on the prop. I could see it and clean it from the dock. Every time the boat came out of the water I polished everything up and gave it a liberal coat of vaseline which kept it from fouling for quite a few months. After that I just put on the mask and snorkel and scrubbed it once in a while.

Now that I have a bigger boat the prop and propshaft are a bit harder to get at. Rather than floating on the surface breathing through the snorkel while I worked it now takes quite a few dives under the boat to get the growth cleaned up.

I am planning to upgrade to a folding prop the next time the boat comes out of the water, and I am thinking perhaps it is time to look into different antifouling options for my metal surfaces. I am wondering what others use that works well on props and propshaft.

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Re: Prop and propshaft antifouling

I spray prop with some gray colored anti fouling spray paint... can't recall the name... when I do... I will post it. It's quite effective.

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Re: Prop and propshaft antifouling

Honestly, I've never found anything that will stay on a prop if you use it frequently. In Oz we chromed our props on the sportfishing boats, mainly to attract fish, but as chrome is pretty slippery stuff and we ran 6 or 7 days a week, often at 20+ knots, I thought the props would remain growth free. No such luck.
So, as I have been doing since 1969, I just clean up my running gear really well and paint it with the regular bottom paint, and when it wears off, it's worn off, and that's why we bought a Sea Breathe deck snorkel.
A factory rep prepped and painted the running gear with Prop Speed one year, but we didn't find it any more effective or long-lasting than bottom paint, so we don't use it.

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Re: Prop and propshaft antifouling

I like to sand the prop down to clean metal, apply 2 coats of the Interprotect 2000 barrier coat, then apply 2-3 coats of a hard bottom paint. Works awesome, even if the boat sits for a few months.

I tried the Petit Barnacle Buster spray a few years ago with no luck - lots of hard growth after 6 months, even with using the boat fairly regularly.

I sail mostly in Florida.

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Re: Prop and propshaft antifouling

Don't apply standard copper paint directly to your prop or shaft. It could promote corrosion. Use an antifouling paint meant for metals or apply a barrier coat to the prop and shaft first to isolate the two dissimilar metals from each other. But make sure your zincs make direct contact with the metal.

It is difficult to get paint last on your running gear. There are a few types of antifouling paint specifically designed specifically for this application. The most popular here in the US is called Prop Speed. I think Interlux makes another. The one thing they all have in common is that they are more expensive than gold, and they still wear off. I have found that a fresh barrier coat helps the paint to adhere.
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Re: Prop and propshaft antifouling

I use the Petit 1792 Zinc Coat Barnacle Barrier with great results.
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Re: Prop and propshaft antifouling

I’ve used the spray Barncale Buster for the last 6-7 years. It has done well and I went 33 months recently and prop did well. My current application is only 4 months old and hasn’t been impressive
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Re: Prop and propshaft antifouling

Quote:
Originally Posted by Damon Gannon View Post
Don't apply standard copper paint directly to your prop or shaft. It could promote corrosion. .
You know, I've seen others post this and I can't imagine where this "worry" comes from.
I have personally painted the running gear (and bronze thru-hulls) on hundreds of wood and glass boats since 1969 and have never seen any sign of reaction between any antifouling paint and the metals of the running gear.
I'm talking about boats as old as 1906 with I'm positive at least some 90-year-old bronze and a boat I owned and sailed through the SoPac in the '70s, launched in 1909, with lots of original bronze.
All the old timers I knew who worked in the boatyards in the '60s & '70s had been applying antifouling paint straight on the running gear for many decades.
Sorry, but I wouldn't waste one fraction of a second worrying about this as a potential problem.
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"Any idiot can make a boat go; it takes a sailor to stop one." Spike Africa aboard the schooner Wanderer in Sausalito, Ca. 1964.
“Believe me, my young friend, there is nothing - absolutely nothing - half so much worth doing as simply messing about in boats.” ― Kenneth Grahame, The Wind in the Willows

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Re: Prop and propshaft antifouling

Prop Speed ....excellent results. Applied every three years


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Re: Prop and propshaft antifouling

It doesn't last a particularly long time but nothing works better than Propspeed.
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