You can add an aditional 3 which helps but depending on motor prop size and how many cells your running it might not make any difference. I run a 1518 on 6s with a m645 and have no problems but it does seem to run a little better with my m545 though. Temps are usually around 120 at the caps and I've had many successful runs with my 180. I put a brand new swordfish in my df running a cc1717 and it blew the first 2mins in the water and that is a 6s motor and I was runing same size prop that was on my mg. That motor should have no problem running a 645 if my 1518 doesn't but sometimes you just get a lemon
Originally posted by 26missgeico
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