Okay thanks. I was thinking
The prop was undersized because the engine easily reaches red line while at hull speed. The only thing that makes me unsure is that it is badly corroded and has a few small chips.
I just purchased a 1969 30-1 with a 16hp universal diesel and need a new prop. what kind of prop do you have on yours? I have a 3 blade 13X10 and feel it is too small but not sure how big to go.