Mike I wasnt paying close attention to the RPMs at plane. Several starts the prop didnt cavitate at all so maybe 2000. Once I did get the prop cavitated and had the RPMs to 4500 but didnt help much. Your right about running a 25. I wont be at that altitude all the time but when I do we will need another prop. Will need to get acquainted with the local bass fishermen and see if I can borrow someones prop. Thanks for the great feedback.FishStalker please let me know the contact info of you friend. Toadrustler. Would prefer to visit Texas and see how good this Evinrude is before jumping ship.