If you have them on the prop, they are elsewhere slowing you down too. Any
source of friction will have a dramatic effect on speed. We have the bottom
quick wiped by a diver before each race.

"Harvey Waxman" wrote in message
...
Would it be likely for a heavy growth of barnacles on a prop to prevent an
engine from getting up to speed?

I have a 21 HP Westerbeke which won't go above 1500 RPM in gear but has no
trouble in neutral. I dove down and the prop turns easily enough when not
engaged but is loaded with barnacles worse than I have ever seen it.

I'm going back down to scrape but was wondering if I have more problems
than
that?

Thanks

Harvey

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