Hello i have brotherhobby returner r2 an 2 of the mount motor holes are stripped. Will a hard lockthread glue keep the in place? Amy other solition? Thanks

I don't think threadlock can form enough solid or have enough strength to hold the screw without sufficient contact between threads.
Epoxy might be another idea, but it will be close to impossible to remove later on...
I had this problem before and my solution was to just use some heavy duty zip ties and tight down the motor mount to the arm... I added some foam tape between motor and arm, and it worked pretty well

The proper way to do it would be with a helicoil kit but they're not particularly cheap, so for a one-off job that may not be a financially viable option. They are useful things to have in your toolbox though.

Thanks a lot for the help guys!!

Just use the 2 good ones! I only ever use 2 screws on my motors. Never had a problem

(23-Jun-2018, 10:05 PM)RENOV8R Wrote: Just use the 2 good ones!  I only ever use 2 screws on my motors. Never had a problem

That's what I would do. I normaly run with 3 in each motor, but if I had to, I would use 2. There are even a handful of ultralight frames out there that only have 2 motor holes to start with.

Unless maybe they were both on the same side and not opposite each other.

(23-Jun-2018, 04:30 PM)SnowLeopardFPV Wrote: The proper way to do it would be with a helicoil kit but they're not particularly cheap, so for a one-off job that may not be a financially viable option. They are useful things to have in your toolbox though.

I agree with SnowLeopardFPV, the most correct way is with a helicoil.  But if experts RENOV8R and DoP say go with 2, you can bank that will work for you. You could also drill and tap for a slightly larger hole/thread size for the stripped one. Again, maybe too much work when 2 likely will work.

DoP had a good point, I'd only go with 2 if they were opposing. If not, I'd just buy a new motor. helicoil or drill and tap are just too much effort