Bad Motors

[RCKong]

Is there any way to check your motors to see if they are bad or demagnetized?
I "HAD" a new CC 120 hydra, on a new feigao 8XL with 3 total runs on it, new out of the box on 5000 40c Turnigys in my UL-1. this setup ran fantastic the first 3 times with all temps nominal.
Well the 4th time, I plugged it in and put it in the water, the motor studdered twice like it was binding up, and then the controller grenaded before moving 2 feet.(boom)


I'm getting tired of losing a controller every time I go out on mild setups.

[Jesse J]

Did you check your temps on the three successful runs? You may be able to avoid this problem by checking after less than a minute, if both motor/esc hot on mild setup, may be bad motor.

I will be watching to see what the verdict on checking a motor, but I just narrowly missed a similar case with notoriously troublesome motor. I put in new bearings, ran it on mild voltage, after two laps, motor was too hot to touch and ESC was getting on the warm side. I have ditched the motor and saved myself the smokey woes.

[RCKong]

Yea, the highest temp on the motor was 130* F. The water in swfla this time of year is around 90*F so that doesn't leave alot of headroom so to speak.

[BakedMopar]

I had a CC 120 do something similar. It ran for about 1 minute then it started to like "glitch" then went dead. Brought her in and found something similar to yours.

[RCKong]

Any ideas about this? ... Brand new 8XL with 3 runs on it never over130*F... now I'm scared that the motor is bad

[Make-a-Wake]

Does the motor spin freely by hand turning the shaft? Do you feel any cogging? If yes to both it may still be ok.

[RCKong]

yes its seems fine