I have used Motor Guides for several years and switched to a Minn Kota when I ordered my newest Basscat. I do like all aspects of the motor but it is noisy at the 35-45 % power level. Somewhat sounds like prop is hitting a small stick. Motor is very quiet at all other power levels. Noisy when in the water and I can continue running, raise out of water and noise stops. Any experienced the same or have any thoughts?