So was running 18 pro xs 250 2 stroke with a bravo xs 26p.so running 5800 rpm @ 74mph , good out the whole. Now I have 23 4stroke 250 pro xs same prop but I had to plug all 8 holes for a whole shot I can live with not bad but only 5600 rpm @ 70 mph, I have tried _25p fury 3 , bad whole shot but gained 200 rpm but didn't gain any speed , still 70 I tried a 24 p fury 3 same as 25p hole shot, but I did get 6200rpm needed but still 70 mph so no gain in speed which I just dont understand didn't really feel slipping . so I'm lost should I find a 4 blade 24 I'm lost trying to get my speed back and whole shot