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Old 10-02-2009, 10:07 AM   #15
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Originally Posted by alan View Post
For your interest, I have applied a coating of permanent marker ( Sharpie) to my prop and just got back into the water today. Will keep a regular check to see how it goes and report back.
Please keep us posted.
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Old 01-13-2010, 05:19 PM   #16
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We did coppercoat on the entire hull, and having a lot of hull, we like to feel that we got good at application of it, but it would take someone way more skilled than us to get it on smooth enough that you were not drastically reducing propeller efficiency. I use 1200 wet paper on the prop when I go down to look at the bottom, so starting with a really good condition blade, when I hauled out I used McLube on blades 1 &3 and wax on 2&4 and the McLube lasted over 6 months after the wax had started to fail to keep growth off. I will try the sharpie next time we haul, vs the McLube and see if any improvement. I painted the prop shaft and shaft tube with coppercoat, and so far have had no barnacles or tubeworms grow on it, but have not been a whole year yet, so will see how it works out.

We also use a trash masher bag over the prop (I align the blades to neutral after I grease the prop to keep growth off the bearing hub so the blades will feather) and the addition that I have found helps the most is to fill the bag with fresh water with our cockpit shower hose (or dock hose) after the bag is on the prop and before I put the cable tie on. The prop, prop zinc and blades then look just like new when I take the bag off and away we go....
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Old 01-13-2010, 07:25 PM   #17
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Old 02-01-2010, 05:43 PM   #18
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... any idea what could be done against the calcium deposits inside the mechanical structure of a folding prop (Flex - O - Fold, Denmark)?

The barnacles have no chance once you put the engine in gear - they get crushed. But due to the remaining calcium deposits it does not fold all the way any more after you turn the engine off...

Talked to the company producing the prop - they suggested to soak the whole prop in descaler for some time - it won't harm the metal.... No problem, if the boat is on the dry during the winter season. But that can't be the solution to take the whole prop and shaft home. Well I did it anyway, soaked the prop for a day until it was very shiny again (just like new on the outside!), but it did not result in a smooth folding and unfolding. So I disasambled the prop and was surprised about the remaining masses of calcium deposits that still remained in the inside. Finally I cleanded all parts mechanically, put everything back together and now it works fine!*

Does anyone knows a smarter way to clean a folding prop or to keep it clean? I hesitate to cover the 'Gear teeth' with any coating or grease that possibly resinifies and slows down the folding mechanism even more! Good idea with the plastic pose to cover the prop with - but the water quality (bigger harbour) does not invite to jump into the water more then necessary...*

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Old 03-18-2010, 08:17 AM   #19
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Quote:
Originally Posted by edboat View Post
Coppercoat is not recommended for props. We are testing a new barrier coat with Coppercoat here in the states and will watch the tests for a year or so before we recommend it.
I realize it has just been 5 months and a bit but was wondering if there was any positive feedback?

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Old 04-16-2010, 11:03 PM   #20
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Sorry to take so long to get back on this but the result of using a Sharpie permanent marker on my prop has proved to be favourable! It's been all of 6 months now since haulout, average use of boat, sitting in marina, at anchor, long motoring trips ( no wind) and good saiing days, so just general use.

Barnicles are all over the cutlass housing and prop locking nut but NOT on the blades where I applied 2 coats of marker, just a bit of slimeing etc is evident but definitely no barnicles!

Cheers, Alan
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Old 04-29-2010, 02:00 PM   #21
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Thanks for the update Alan. I'm hauling out in a couple of weeks so Sharpie is on the menu.Sharpies do not seem to be the flavor of the month in Singapore but I've got a lead in one part of the island, hopefully it won't be a fine point marker....

Fair Winds,
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Old 05-05-2010, 02:33 AM   #22
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Hi Fracis , my boat is in S'pore, too. Were you able to find "Sharpie" markers in S'pore, and if so , where ?

S/V Calliste
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Old 05-31-2010, 01:18 PM   #23
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Sorry for the slow answer, I googled for Sharpies in S'pore, got a hint in Popular bookstore in Tampines, went there no joy!!! I bought some markers that strongly smelled of ethanol, it may work. I've seen S/V Calliste around. I'm high and dry in Raffles Marina waiting in F.....g Volvo spare parts. If you are around feel free to drop by Charisma in Jeffrey's yard.

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Quote:
Originally Posted by Calliste' date='05 May 2010 - 02:33 AM View Post

Hi Fracis , my boat is in S'pore, too. Were you able to find "Sharpie" markers in S'pore, and if so , where ?

S/V Calliste
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Old 10-20-2010, 07:59 PM   #24
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Felt tipped pens work (who invented this "sharpie" word ?) I have been using this method (2 layers) since Jan 2006 and it lasted 2 years in the Far East and Med, but not so good after latest 2 years (1 in Med and 1 in Caribbean) - but nor was my antifouling working properly after 2 years 2009 and 2010
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Old 10-21-2010, 11:31 AM   #25
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Quote:
Originally Posted by steelfan View Post

Felt tipped pens work (who invented this "sharpie" word ?) I have been using this method (2 layers) since Jan 2006 and it lasted 2 years in the Far East and Med, but not so good after latest 2 years (1 in Med and 1 in Caribbean) - but nor was my antifouling working properly after 2 years 2009 and 2010
"Sharpie" is a bit like "Biro" - the brand name has become the generic name. If it's an Australian permanent marker with "no xylene", it most likely will not work if its solvent is an alcohol instead. Sharpies are available in Australia, I understand, but I don't find a reference for them in Singapore.
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Old 10-21-2010, 12:18 PM   #26
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Biro was the name of the inventor of the ball point pen :B I R O

Sharpie is merely a brand of disposable tools manufactured by Sanford.

S HA R P I E
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Old 10-22-2010, 12:59 AM   #27
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Biro was the name of the inventor of the ball point pen :B I R O

Sharpie is merely a brand of disposable tools manufactured by Sanford.

S HA R P I E
That's what I said. The brand name, BIRO, became the generic name for ball point pens in Australia.

Sharpie the brand name has become the generic name for a permanent marker.
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Old 02-17-2012, 04:31 PM   #28
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I have invented a product that will keep barnacles off a boat's inboard propeller.
www.proppak.com

Basically after any underwater service the PropPak underwater propeller cover is easily placed around the boat's propeller. There is a line from the cover to the surface which, when pulled from above the waterline will remove the cover for the propeller exposing a just serviced propeller.

The cover is reusable so after any underwater service simply reinstall. This item is perfect for divers to add to their service. Extending the dive and giving better customer service.

Thanks for reading
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