lets hear your numbers , 25 is unlikely on a modern performance hull. prop brand and type ,pitch , rpm ,drive ratio,mph? tach must be accurate and mph should be on gps,factory speedos are often wrong! you may have an error in calculating , I did ,as you see if you read the thread , the guys in here were great help .Thanks again by the way all who helped

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bravo 26 4 blade
1.5xz drive
69 mph on gaffrig speedo is best ever
67-68 usually
speedo lies by 2mph compared to gps
5150 rpm wot Thanks JC