Hello, I got a odin 1818 months back.had a few crashes.now suddenly I am facing a problem.when I give half throttle it starts spinning and when I give full throttle it suddenly stops.what may be the problem? I used 5x3 prop.without prop it spins.maybe it is not able to spin with prop.before the motor was perfect.i opened it up I found some sand particles inside.i cleaned it up.The bearings are looking ok.i am usin 20amp esc.i thought esc may be not working so tested with another.again same problem.please help!