ORIGINAL: gaRCfield
I'm assuming the 'tick' quiet, and more like 12 sides? There are magnets in the motor, thus the prop will not just spin 'freely', although the resistance when unpowered is small. It should take a small amount of effort to spin the motor by hand through each 'tick'. This is normal.
Nice motor you got there, I'm a little jealous [&o]
Joe, I was actually on the sidelines awaiting your report on the Scorpion motor.... sorry to hear about your woes and thanks for sharing them with us.