does anyone have a suggestion for preventing marine growth on the shaft or prop? Does painting with bottom paint work and if so what type?
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zincs
If you paint your shaft, don't paint the section where the zincs go, and don't paint the zincs themselves.
If you paint your shaft, don't paint the section where the zincs go, and don't paint the zincs themselves.
Prime first...
Chesapeake Bay Magazine had a great article in one of the past issues recommending Interlux 2-part ZINC Chromate primer called VINY-LUX Primewash for priming before applying bottom paint to the prop and shaft. Three of us used it last year as a primer to Trinidad SR. Worked great!.
Chesapeake Bay Magazine had a great article in one of the past issues recommending Interlux 2-part ZINC Chromate primer called VINY-LUX Primewash for priming before applying bottom paint to the prop and shaft. Three of us used it last year as a primer to Trinidad SR. Worked great!.
Does not seem like a good idea.
It does not seem that applying Cooper based paint directly to a S.S. shaft and/or Bronze/Brass prop is a very good idea. It would appear that using a primer to seperate the corrosion that would happen between the two is the prudent thing to do. On the other hand, if you don't put some type of paint on the prop, shaft and strut how are you going to keep growth off of them?
It does not seem that applying Cooper based paint directly to a S.S. shaft and/or Bronze/Brass prop is a very good idea. It would appear that using a primer to seperate the corrosion that would happen between the two is the prudent thing to do. On the other hand, if you don't put some type of paint on the prop, shaft and strut how are you going to keep growth off of them?
take back your shaft
I did basically the same as chris the last haulout and my prop and shaft are still free of hard growth, and that;s down here in the warm water. the paint was not applied to the area that the zinc attaches to.
I did basically the same as chris the last haulout and my prop and shaft are still free of hard growth, and that;s down here in the warm water. the paint was not applied to the area that the zinc attaches to.
Still Looking
Like Chris Behre I tried the same Primer and Bottom Paint but it did not work in my area.. I've heard something called Clear Coat made for IO's works... It comes in a two part aerosol package.. One aerosol is the Primer the other is the Clear Coat.. Seems to wortk for others so guess I'll try.. Anyone had success with this????
Like Chris Behre I tried the same Primer and Bottom Paint but it did not work in my area.. I've heard something called Clear Coat made for IO's works... It comes in a two part aerosol package.. One aerosol is the Primer the other is the Clear Coat.. Seems to wortk for others so guess I'll try.. Anyone had success with this????
Shaft & Prop Antifouling Method
Two years ago my prop & shaft were a complete mess at fall haulout. No more room for any more barnacles. A friend told me that in conversations with a prop shop, they told him that fishermen use STP Gas Treatment to coat the prop & shaft, and that it works a repellant to the critters. They actually heat up the removed prop and then put it into a tray of STP Gas Treatment so that as it cools it absorbes the fluid into the bronze. Last spring I tried it by just using fine 'emory' paper and wet sanded the prop & shaft with the STP. I reapplied just the STP with a cloth every few days when I was there working on other things getting ready for launch. When we hauled out last fall there were only TWO banacles on the prop & ONE on the shaft. Either it works or it was a very low barnacle growth season ( or both). I plan to do it again this spring. By this fall I will then have two data points. Dick Carey S/V Puffin
Two years ago my prop & shaft were a complete mess at fall haulout. No more room for any more barnacles. A friend told me that in conversations with a prop shop, they told him that fishermen use STP Gas Treatment to coat the prop & shaft, and that it works a repellant to the critters. They actually heat up the removed prop and then put it into a tray of STP Gas Treatment so that as it cools it absorbes the fluid into the bronze. Last spring I tried it by just using fine 'emory' paper and wet sanded the prop & shaft with the STP. I reapplied just the STP with a cloth every few days when I was there working on other things getting ready for launch. When we hauled out last fall there were only TWO banacles on the prop & ONE on the shaft. Either it works or it was a very low barnacle growth season ( or both). I plan to do it again this spring. By this fall I will then have two data points. Dick Carey S/V Puffin
Regular cleaning
Do what everybody else does. Have your bottom cleaned on a regular schedule. There are many services that will clean your boat bottom shaft and screw, each month for as little as $1.20 a foot. Paint, will not prevent growth but will slow the boat. Cleaning is the only way I know of keeping the screw clean.
Do what everybody else does. Have your bottom cleaned on a regular schedule. There are many services that will clean your boat bottom shaft and screw, each month for as little as $1.20 a foot. Paint, will not prevent growth but will slow the boat. Cleaning is the only way I know of keeping the screw clean.
Smooth as a baby's rear end...
Well maybe not as smooth however I was told to use Balmex(petrolium based ointment for diaper rash) by my marine surveyor. I apply copius amounts on the shaft prior to launch and comes the fall I've had little or no barnacles build up. I'm sure there is a marine equivalent however it's probably 10x as much.
Well maybe not as smooth however I was told to use Balmex(petrolium based ointment for diaper rash) by my marine surveyor. I apply copius amounts on the shaft prior to launch and comes the fall I've had little or no barnacles build up. I'm sure there is a marine equivalent however it's probably 10x as much.
Clear coat didn't work for me
I tried the outdrive clear coat and found it had no significent effect on retarding growth. I am located in Westerly RI. I have always used a metal primer and then regular ablative bottom paint. This works a little but I think the pain wears off too quickly on the prop. I too have heard of the STP treatment, but have never tried it. I would like to hear from everyone as to the results they obtained and where they were located. Regarding getting the bottom, shaft and prop cleaned monthly for $1.20/ft - Are you sure that you don't mean $12/foot? In my area of the boating world, $1.20/ft is the cost of a mooring for a night or 3/4" line. I can't imagine any labor available for that low of a price. You are very lucky. Rich
I tried the outdrive clear coat and found it had no significent effect on retarding growth. I am located in Westerly RI. I have always used a metal primer and then regular ablative bottom paint. This works a little but I think the pain wears off too quickly on the prop. I too have heard of the STP treatment, but have never tried it. I would like to hear from everyone as to the results they obtained and where they were located. Regarding getting the bottom, shaft and prop cleaned monthly for $1.20/ft - Are you sure that you don't mean $12/foot? In my area of the boating world, $1.20/ft is the cost of a mooring for a night or 3/4" line. I can't imagine any labor available for that low of a price. You are very lucky. Rich
Some people...
...use zinc oxide, another diaper rash preventative, on their shafts. Next thing you know they'll be slathering anti-fouling paint on the baby's bottom.
...use zinc oxide, another diaper rash preventative, on their shafts. Next thing you know they'll be slathering anti-fouling paint on the baby's bottom.
More shaft
Last year I asked Bill Spicer what I should use on the stainless shaft to keep the barnacles off & he suggested using transducer paint. He sells it in a small plastic bottle with attached brush. It worked perfectly. Don't put it on the shaft where the zinc goes or on the zinc itself. I have never put any bottom paint on the bronze prop and at year end seldom have any barnacles.
Last year I asked Bill Spicer what I should use on the stainless shaft to keep the barnacles off & he suggested using transducer paint. He sells it in a small plastic bottle with attached brush. It worked perfectly. Don't put it on the shaft where the zinc goes or on the zinc itself. I have never put any bottom paint on the bronze prop and at year end seldom have any barnacles.
Tin Oxide
Several years ago, the EPA pulled tin oxide based paints off the market for general purpose boat, bottoms, but I think it is still used in the special purpose paints for aluminum products (outdrives). Tin Oxide is extremely effective / toxic. It may be the active ingrediant in the transducer paint also. I'm going to try a barrier such as epoxy to isolate the metal surfaces electrically from the paint, then cover with the specialized paint.
Several years ago, the EPA pulled tin oxide based paints off the market for general purpose boat, bottoms, but I think it is still used in the special purpose paints for aluminum products (outdrives). Tin Oxide is extremely effective / toxic. It may be the active ingrediant in the transducer paint also. I'm going to try a barrier such as epoxy to isolate the metal surfaces electrically from the paint, then cover with the specialized paint.
Used vinyl for years now
I paint my shaft and prop with Interlux 2000 primer acording to directions and then apply vinyl bottom paint( I use Jack Tar vinyl). I have used this for many years on several boats. I pull my boat every 12 to 16 months and never have barnacles or growth. I also have friends with power boats which do the same. I have seen boats go for as long as two years here without growth or barnacles on them with the vinyl. Do not paint the area where you apply the zincs
I paint my shaft and prop with Interlux 2000 primer acording to directions and then apply vinyl bottom paint( I use Jack Tar vinyl). I have used this for many years on several boats. I pull my boat every 12 to 16 months and never have barnacles or growth. I also have friends with power boats which do the same. I have seen boats go for as long as two years here without growth or barnacles on them with the vinyl. Do not paint the area where you apply the zincs
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