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Go Back   SailNet Community > General Interest > General Discussion (sailing related) > Downside to leaving outboard motor prop in water?
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Thread: Downside to leaving outboard motor prop in water? Reply to Thread
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Topic Review (Newest First)
03-07-2013 03:29 PM
pdqaltair
Re: Downside to leaving outboard motor prop in water?

No experience with the product, but...

Any action that removes oxygen (tight bag, no openings) will tend to kill marine life. That is one reason why closing seacocks really helps; the little buggers die.
03-07-2013 01:35 PM
TakeFive
Re: Downside to leaving outboard motor prop in water?

Quote:
Originally Posted by mad_machine View Post
As already mentioned.. he is in Fresh water. Also, his outboard is in a well, so with the hatch closed, it keeps the rain out. While maybe not a good an idea as say the thick trash bags (which would do the same thing) it would work well in his case
My comment was directed at the video, not the specifics of the OP's situation.

Did you look at the video? I don't see it working for anyone - fresh water or salt water. Pulling your whole boat over a plastic tarp with flotation around the edges is just a stupid idea. No way you'll keep moisture out of the area between the hull and tarp. Even if you don't have barnacles in fresh water, you'll still get slime, mold, leaves, seeds, and all sorts of other organic matter that will decay into a nice smelly culture. There's a reason why swimming pools have chlorine and filters.
03-07-2013 11:16 AM
mad_machine
Re: Downside to leaving outboard motor prop in water?

Quote:
Originally Posted by TakeFive View Post
I don't understand this product. The bag will collect rainwater. Any wave action from storms, and this water will be contaminated by the seawater. Since it all sits on the surface and the blue bag soaks up the sun, the rainwater will get very warm. Looks like a very healthy culture for growing slime. The water in the bag will likely get contaminated with some barnacle larvae, and you've got barnacles, which will grow very fast thanks to the heat.

I don't see how this product will do anything to protect the boat. It will just lull you into false security, so you'll leave your bottom bare and suffer the consequences.

Please correct me if I'm wrong.
As already mentioned.. he is in Fresh water. Also, his outboard is in a well, so with the hatch closed, it keeps the rain out. While maybe not a good an idea as say the thick trash bags (which would do the same thing) it would work well in his case
03-07-2013 06:42 AM
Minnewaska
Re: Downside to leaving outboard motor prop in water?

Quote:
Originally Posted by timtim View Post
is it possible to bag the lower unit, after bagging it pump out the water, then no growth.
youtube.com/watch?v=5m8OpsM5uVQ
Their actual website is unavailable. I assume it is because their product was not useful. Personally, I can't imagine what they thought it was useful for. I'm even trying to think of what would happen to it during high winds, while the boat wasn't on top of it. I'm going to put that invention on the list with cayenne bandages.

I see no net value in the OP trying to get clever with this one. If you must leave the leg in the water, I would just paint it with anti-fouling and wipe it down a few times per year. While it doesn't sound like you can close a cover if you lift the outboard, perhaps you could just have a way to lift it so that you could clean it periodically.
03-07-2013 03:17 AM
whoaski
Re: Downside to leaving outboard motor prop in water?

I have heard people will wrap their prop with a thick mil black trash bag and tape it up totally covering the submerged portion of the out board or the lower end. Theory is to block the light out and stop photosinthesis( prob spelled that wrong ) ever hear of that and-or any truth to it. Also somthing about it's normally warmer in the water that the air. But I'm probly totally wrong.
03-07-2013 12:14 AM
TakeFive
Re: Downside to leaving outboard motor prop in water?

Quote:
Originally Posted by timtim View Post
is it possible to bag the lower unit, after bagging it pump out the water, then no growth.
youtube.com/watch?v=5m8OpsM5uVQ
I don't understand this product. The bag will collect rainwater. Any wave action from storms, and this water will be contaminated by the seawater. Since it all sits on the surface and the blue bag soaks up the sun, the rainwater will get very warm. Looks like a very healthy culture for growing slime. The water in the bag will likely get contaminated with some barnacle larvae, and you've got barnacles, which will grow very fast thanks to the heat.

I don't see how this product will do anything to protect the boat. It will just lull you into false security, so you'll leave your bottom bare and suffer the consequences.

Please correct me if I'm wrong.
03-06-2013 09:48 PM
timtim
Re: Downside to leaving outboard motor prop in water?

is it possible to bag the lower unit, after bagging it pump out the water, then no growth.
youtube.com/watch?v=5m8OpsM5uVQ
03-06-2013 05:59 PM
mad_machine
Re: Downside to leaving outboard motor prop in water?

that is a different matter then.

Exactly how far up can you get the engine? The only problems I see with leaving it in would be growth in the intakes.. At least freshwater means no barnacles
03-06-2013 12:15 PM
Alex W
Re: Downside to leaving outboard motor prop in water?

His boat isn't on salt water, it is on Lake Washington which is fresh water.
03-03-2013 04:26 PM
mad_machine
Re: Downside to leaving outboard motor prop in water?

saltwater also has a lower freezing temperature.. so even less likely
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