[bmcelvy]

Ok so already I know mistake, I have an eachine 250 racer. But I wanna fly it at least. Who knew all these videos making it look easy and yet it's really not!!! Sooooo.... I first went straight to librepilot and upgraded firmware not knowing I needed a bootloader file. So I went through the whole set up and flew it and about 15 seconds in #1 motor quits and it falls out of the sky. So I do more research and find it needed a bootloader so I get a bootloader and now it won't connect to anything or do anything. Battery plugged in it won't beep but lights up. Please help a newb

[bmcelvy]

Nevermind i fixed the problem with the firmware but motor #1 still shakes in stead on spins when trying to calibrate. Why is this?

[ernstock]

Some reasons why s motor stutters :

One of the three wires going to it is suspect.

Motor mounting bolts are a tiny bit too long.

I suppose the esc could be faulty.

Motor is damaged.

Can you swop a different motor to position 1 ?
Or ,
With props off ,
gently push on the motor wire connections as you try to run the motor - can sometimes show a bad connection.

[SamSam]

yeah.. I think you need to trouble shoot, its not the FC, could be the ESC or the motor, try replacing the motor, or the ESC