ORIGINAL: Neurotex
ArmedZagi, use some Teflon, 100% pure silicone or even some 3 in 1 oil
in small amounts on the motor shaft. This might help break in the motor.
Or the prop is pressed on too far and it's rubbing against the base of the motor.
There should be some clearance in the shaft play, even when the prop is
pushed into the motor.
Theres pleanty of clearance between the prop and motor. What are the first two things you suggested? The only time I've ever heard of teflon is on a frying pan [&:]