prop turns but minimal boat spped - Page 2 - SailNet Community
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post #11 of 16 Old 07-03-2011
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the bottem and prop is the most likely problem but there could be others too,if cleaning,checking doesn't solve plz give us a report
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post #12 of 16 Old 07-04-2011
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cleaning the prop will make the biggest difference for the least amount of effort. If you are hauling the boat you can finish the rest of the bottom when it is out of the water. (but dont let it dry out first - as others have said you will then need a jackhammer to get them off)
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post #13 of 16 Old 07-05-2011 Thread Starter
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Hey Guys,

I may have missed this part. Why would black smoke be a sign of a fowled prop or hull?

So I had the boat hauled today and the hull didn't look too bad but there were clearly barnacles on the prop and prop shaft.

Otherwise the prop looked good and the zinc was still there (a little of it anyway).

But why the black smoke?

Rick
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post #14 of 16 Old 07-05-2011
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Black smoke can mean anything from clogged fuel filters to a restricted exhaust elbow to clogged injectors...everyone here is willing to share their knowledge and experience. The more history and symptoms you can supply the better everyone can help.

Good luck!
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post #15 of 16 Old 07-06-2011
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I was only making 1.5-2.5kt on a 9 kt boat and figured fouling...Had the prop. and bottom dove on and all resolved.

My question is, how quickly does this growth occur and what can you do?

I know it depends on the conditions (warmer waters) and the boat (more complicated hardware) but wonder about avoiding such major fouling. I left the boat for 4 months in SF bay and expect that is where it all occurred.

Should you spin the prop once a week, month or what to prevent major fouling?

Cheers
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post #16 of 16 Old 07-07-2011
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I am also in SF (South Bay).

Spinning the prop does not help - strange but true. The barnacles grow regardless.

Over summer, as the water gets warmer, you need to clean the prop/bottom about every month. If you don't race, and don't mind knotmeter and depthsounder failing, a couple of months. Over winter, 2 or 3 months wait is fine.

I clean every month May-October, and a couple of times over winter.

To prevent major fouling and bottom cleaning, either clean regularly, or go spend a week in the Delta. The fresh water kills off all those saltwater critters!
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