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Old 02 October 2008, 19:11   #41
K&S
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I have seen props with similar cavitation burning where i suspect a buble gets trapped and just keeps burning away in the same spot. worst i have seen was on an old yamaha where the damage looked as if someone had drilled right through nice and clean.

I could be wrong but thats what i'd put my 10p bet lol
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Old 03 October 2008, 11:38   #42
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Originally Posted by K&S View Post
I have seen props with similar cavitation burning where i suspect a buble gets trapped and just keeps burning away in the same spot. worst i have seen was on an old yamaha where the damage looked as if someone had drilled right through nice and clean.
props, yes. They spin at a fairly high rate. The anode just gets dragged through the water at hull speed, so I doubt very seriously if you'd ever get cavitation there.

jky
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Old 03 October 2008, 15:57   #43
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I'm no scientist however i am aware that you get low pressure cavitation, so my 10p bet still stands
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Old 03 October 2008, 16:02   #44
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I guess the easiest way to prove wether its cavitation or an impurity in the anode is to replace the anode and see whether the pattern is repeated in the new anode if it is then its most likely cav damage.
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Old 03 October 2008, 16:08   #45
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Probably the easiest solution.
as a point of interest did you know when you 'crack' your knuckles that sound is cavitation, another useless fact to impress girls at bars with lol
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Old 07 October 2008, 03:00   #46
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I had a look at my 90 which sits on the water/beach for 8 months of the year and there is absolutely no sign of simmilar happening.

Just a thought but are you launching regularly in badly polluted waters and might something there be causing it?

Ian
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