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Old 06-04-2016, 10:36 AM   #1
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Prop Speed Coating

I talked with a rep at a boat show, and did some research on the web.

This prop and underwater gear coating is used extensively in Aus, and seems to be used more in the US the past few years.

I have dual, counter rotating high speed props, and getting some pitting. We have ruled out galvanic action, so I think it's related to cavitation.

I was thinking about applying this material at the next haul out. I realize it will not completely resolve the situation, just trying to mitigate the situation.

Any feedback on the product, experience, etc is appreciated.
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Old 06-04-2016, 11:13 AM   #2
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Do a forum search re "Prop Speed"the subject has been extensively covered. I had previously used all sorts of coatings but since changing to Prop Speed some 10 odd years ago would now not use any thing else.I am not high speed but some of my friends who use the product are.
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Old 06-04-2016, 11:28 AM   #3
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I tried Prop Speed two haulouts ago. It was gone in one season. It cost $200+ to have the yard apply it. Unless you do it yourself and haul out annually I wouldn't bother.


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Old 06-04-2016, 11:42 AM   #4
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We're again having one in CT not benefiting in his mind but move him to South Florida and he'd feel quite different. We wouldn't own a boat without it. However, we're in the world of bottom cleaning monthly not of annual haulouts to clean. The metal underneath then wipes down easily just like the bottom. We do get it re-coated annually.
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Old 06-04-2016, 11:45 AM   #5
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Craig,
I got by w ArmorAll in Alaska.
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Old 06-04-2016, 11:56 AM   #6
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Craig,
I got by w ArmorAll in Alaska.
ArmorAll, you mean the vinyl protectant ?
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Old 06-04-2016, 12:35 PM   #7
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Had good luck last season (6 months, 300 hours) with Petit Hydrocoat copper-free. All the underwater metals, including the prop, looked great with no growth. No primer, just painted over bare metal. Surprised the heck out of me.
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Old 06-04-2016, 02:01 PM   #8
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PropSpeed is great on the props themselves on a slow trawler. It depends on the props' speed to self-clean. On fast 14kt+ boats, it also works well on all the running gear (struts, rudders, etc) but on slow trawlers, the benefit of applying it to other than the props is reduced.


Key to success is meticulous prep and in the USA, where it is still becoming established, you will need to find a yard that is experienced OR which is prepared to read the manufactuer's prepp'ing instructions and follow them strictly and not treat it just like any other anti-fouling. Poor prep and it will come off in a few months; right prep and should be good for at least 2 years in a high-fouling area, in my experience, IF you use the boat regularly. If you use a diver, it makes it a lot easier for them to get the running gear clean and unlike soft anti-foulings, can take a bit of gentle scrubbing (all it takes) and effectiveness can be extended to 3 years.
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Old 06-04-2016, 03:32 PM   #9
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OK it looks like the subject will be re hashed.
The product must be applied as per the manufacturers instructions and the preparation must be spot on.
I normally get 24 months out of one application and I haul out every 12 months (timber boat).
I don't usually clean underneath except if and when I get up the reef, even then when I rub down the hull I will not touch the prop as it will spoil the coating but still no growth on it.
I think there are enough photos on the forum for proof of the application.
I have attached one photo from last haul out after an extended stay in the water of 18 months.
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Old 06-04-2016, 03:46 PM   #10
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OK it looks like the subject will be re hashed.
The product must be applied as per the manufacturers instructions and the preparation must be spot on.
.
That can never be said too much. Much like painting. The vast majority of criticisms of Awlgrip or Alexseal or other paints is the failure to do the job correctly.
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Old 06-04-2016, 04:47 PM   #11
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I wanted to have my yard put Prop Speed on my props but decided, when I heard the price to do an experiment. This was in FL BTW. When the boat was hauled and the props cleaned, I had the yard spray them and the shafts with Rustoleum Cold Galvanizing Spray. Purchased it at Home Despot for about $8 per spray can. I used 1.5 cans.

Two years later, 6 months in FL and 6 in CT each year, the props look great. They are not growth free, but any growth pretty much cleans right off. My diver comes once a month and is pretty amazed. YMMV.
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Old 06-04-2016, 07:29 PM   #12
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Howard,
My Petit Barnicle Buster and Rustoleum cold gal has worked good too. Had some fuz on the prop until I ran it in gear. The boat has been sitting. I would suspect that the cold gal would not hold up in Florida but further north .... fine.

But why spend a lot of money on Prop Speed if a $10 spray can will do basically as good? Some time ago I made it a point to haul out once a year so why put $250 a gal bottom paint on when $100 paint will do.

Tidahapah,
Looks and sounds like you're getting your moneys worth.

Bill11,
Yes .. The auto parts store stuff. I put on several drippy coats. But I think the Petit cold gal or Rustoleum cold gal is better. But if you're in Alaska on a grid w a wet prop the ArmorAll is better than nothing.
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Old 06-04-2016, 08:50 PM   #13
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The real question the OP seems to be asking is whether Prop Speed will help with the pitting issue.

Personally I kind of doubt it. But that is s question asked the manufacturer.

Or better yet, talk to a good prop shop and take care of whatever is causing the cavitation.
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Old 06-04-2016, 09:05 PM   #14
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I tried Prop Speed two haulouts ago. It was gone in one season. It cost $200+ to have the yard apply it. Unless you do it yourself and haul out annually I wouldn't bother.

David
Have a haul-out annually if for nothing else to treat the propeller.

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Old 06-04-2016, 09:47 PM   #15
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I tried Prop Speed two haulouts ago. It was gone in one season. It cost $200+ to have the yard apply it. Unless you do it yourself and haul out annually I wouldn't bother.David
I had almost exactly the same experience & I agree with David.
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Old 06-04-2016, 10:00 PM   #16
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Preparation is the key to long life from Prop Speed and IMO the only way to do a 100% clean is to soda blast every thing that will be painted .
Its the little bits of old paint under the Prop Speed that contaminate the PS and cause most problems .Another thing here in Ozzwhere I am the location of where one moors there boat can make a difference of 12 to 24 month life of PS
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Old 06-04-2016, 11:32 PM   #17
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Damn it Mark, even your propeller is pretty.
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Old 06-05-2016, 02:27 AM   #18
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Here is my prop, just hauled, and before pressure wash, and after 3 years in the water with PropSpeed...and not ever cleaned by a diver either...then, just before re-splash...
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Old 06-05-2016, 07:09 AM   #19
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The real question the OP seems to be asking is whether Prop Speed will help with the pitting issue.

Personally I kind of doubt it. But that is s question asked the manufacturer.

Or better yet, talk to a good prop shop and take care of whatever is causing the cavitation.
Thank you! That was indeed the questions, and I agree with your answer. If cavitation is eroding the metal on the prop, then it will surely erode the prop speed. I think you will be better off figuring out why you have excessive cavitation and addressing the real source of the problem.
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Old 06-05-2016, 11:25 AM   #20
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We love prop-speed!
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