I had the same complaint with the 2000 yamaha F100 on a 20 MA. I changed the prop and I am much happier. I run a 4 blade Solas amita 4 13 x 15p. Due to the differences in lower units, I bet that would work well for you. My 12-3/4 x 17p is terrible by comparison. It is $100 to try that before a repower?
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