I spent about five hours on the boat today and had the chance to run it in varying conditions (fairly calm ocean, crazy ebbing river).
With the 15.25x18 Powertech 4 blades I am seeing 50-51mph (barely) at 6100rpms with engines one hole lower than last year's set. (Old props were Solas Lexor 15.5x17 3 blade with 50/51mph at 6300 rpms.
With the Powertechs my optimum cruise is 3200rpms burning 13.5 gph at 25mph with a efficiency range of 1.60 to 1.86mpg depending on tide/wind/current.
Best part is I now have a mid range, no ventilation and much more positive trim. With that said, I would like to try and run the 4 blades back up in the original hole but that may have to wait until next year as our season is so short. I took some video of the cavitation plates at cruise today but not sure if I can post it here?
So far it feels like a different boat, especially in that cruise range. With old props I was always jockeying the throttle to stay on plane. (It was the same story with my Mercs and the Mirage Plus props)
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