We had a 3 blade fixed prop on a previous boat that used to ring for a while after being cleaned after each haul out, but it did it while motoring near hull speed. We learned that it was not an unusual phenomenom, and that the ringing would go away as the prop slimed up again over time. I suspect your ringing will go away after your prop gets its fuzzy growth back.
1983 Fraser 41
La Conner, WA
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Boating for over 25 years, some of them successfully.