I have a Solas SS 3blade 9 1/4 x 10 prop on my boat. I feel like I am not running as efficient as I should be. My rpm's seem a little low at around 5000 before I blow out, and my speeds seem slow in comparison to other members with similar setups. Compression in both cylinders is 140ish. Should I look at getting a prop with less pitch? Also, how does Solas compare to Powertech? Apples to apples.