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Thread: Cavitation?????
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07-17-2011, 08:30 PM #1Junior Member
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- Mar 2010
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- 27
Cavitation?????
I have read several threads here about cavitation. I'm not sure if cavitation is what i am experiencing...When we are towing I get a lot of what sounds like prop spinning. It seems to only happen when turning to the right. Any ideas or suggestions would be appreciated.
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07-17-2011, 09:23 PM #2Senior Member
- Join Date
- Feb 2005
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- Ottawa, Ontario, Canada
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- 718
It's possible. Does it matter whether the water conditions are glass or choppy? Does it matter if the boat is weighted in the rear? In addition to cavitation, one cause for the sound of the prop thrashing during a turn can be air sliding under the hull from the side. It mainly happens if there is some chop and the rear isn't weighted.
2005 XLV, upgraded ballast, Comptech swivel wakeboard and hydrofoil racks, Monster cargo bimini
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07-17-2011, 11:15 PM #3Junior Member
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- Mar 2010
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- 27
it does it in glass and chop...seems to be more pronounced when towing. does it with weight in the boat as well as empty.
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07-18-2011, 03:21 PM #4
Maybe a silly thought but ....
I just got my Moomba Outback and seriously love it. If I mistakenly leave on the blower, after the engine is cranked sometimes the blower noise changes pitch (sounds like the blower is reving up) and I think I could have mistaken it for cavitation if I were going faster. In my case, I had the dealer check the blower on the initial service and they heard it too but there was no detectable problem - still happens ... will continue to monitor and try to track down what is the cause but certainly it does not seem to be causing a problem.
Richard (LakePerson1952)
2010 Moomba Outback - Loving it!
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07-18-2011, 04:52 PM #5
Years back I had cavitation when towing a three person tube and turning to the right. Sounded like the prop was catching air or slipping. I believe it was from the prop I was running at the time which was a stainless 13x18.5 (if I recall) speed prop. Different props seem to carry different sounds, growls, etc. with them under different conditions.
So when is this "old enough to know better" supposed to kick in?
2001 MobiusV - Slightly Modified...
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07-20-2011, 01:55 PM #6Junior Member
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- Mar 2010
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- 27
I am planning to change the prop to see if that helps. As far as I know the prop on it is the stock 4blade, no idea if the size. I have heard the Acme 1837 is a great pick. All we do in out boat is tow large towables.
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07-20-2011, 03:31 PM #7Senior Member
- Join Date
- Jan 2010
- Location
- Milwaukee, Wi
- Posts
- 263
This is what 30 years of cavitation on a rudder looks like.... In this case, you can't tell while driving the boat nor can you hear it.
08 Outback
82 American Skier