I took advantage of the great weather earlier this week and took the boat for shake down cruise. The first thing I noticed is that my new to me 1988 seafarer hardtop with a 1997 Yamaha 200 SWS carbed would only get up to 4700 rpms. If I trimmed it until near cavitation I could just get 5100rpms. 31knots max speed. Then the fun began as i was returning to the inlet I spun the prop. Luckily some fellow coastguardsmen were nearby and escorted us back through the inlet. I was able to limp back at 2 knots. I have now traded out my 14.5 x 19 ballistic prop for a 14.25x 18 vented Yamaha prop. I hope to get out again soon and see how she does. I know some people are having good luck with some 14.5 or 15 x 17p props. I found the 18p for a steal. I just wonder how the performance will be. I hope to find a 17p to trade for my 19 Ballistic for a spare/primary. Let me know what combinations you have had success with.