A friend had a strange problem today and it has me stumped... He was
driving a XXX buggy w/ Team Orion 17x2 motor. No problems whatsoever,
then it just stopped. After checking for rocks or binding in the drivetrain, he
went to the pits and removed the motor from the buggy. The motor was
'locked up' and could not be turned by hand (didn't try using pliers, etc...).

The armature & brushes were removed to check for any debris but it was
clear... Looking closely at the armature, it appears it has rubbed the magnets
inside the can at some point??? I'm wondering if it is in contact at all times
and is causing the motor to be locked up??? But here's a strange bit of info:
As you install the endbell, you can turn the motor by hand until the 2 screws
are nearly tight... If I hadn't seen the motor running perfectly, I'd think the
screws were too long and hitting the armature...
HELP?!

Thanks,
Scott