Motor problems

[Fred_dente]

When ever I add power to my old power pack c the motor sputters and can get to full throttle. Why is this happening?

 

[Merv]

Could be a short,a broken lead, or a bad ESC.
Give all 3 of the wires a gentle tug, sometimes there is a bad solder joint In the bullet connectors. If you can’t find a break in the connection, try a different ESC.

 

[Fred_dente]

I fixed it by resoldering it.