Lehner 3080 / 8 Brushless Motor ? fault

[mohanjude]

I took the motor out of the car and placed it on the bench. I then connected it to a pulse generator (servo tester). At the neutral it is 0.150 - when I turn it up to say 0.154 the motor starts spinning slowly - you can actually stop the shaft turning by holding between your fingers (at this stage the motor probably has about 100 rpm). when you take the hand off the shaft stays stopped. If I turn the pulse upto say 0.160 the motor spins up faster and the shaft cannot be stopped by hand or stalled.

A large brushless motor should have a lot of torque even at low rpm ?