Sorry for the issues you are having with your Gyre. Unfortunately 9.9 times out of ten it is due to a warn part or assembly error. I would appreciate you going over the assembly of the pump to insure it is assembled properly. Most common mistakes are the bushings are not present or have been stripped, the propellers are placed on backwards and the cages placed on backwards.
1. Please make sure that with the cages removed with one hand hold one of the propellers, If the opposite propeller rotates, you either have a missing or stripped propeller bushing. http://d.pr/i/10tCm
2. Please make sure the blade of the propeller is facing the front of the pump. http://d.pr/i/15D6C
3. Please make sure that the cage marked A is on the left side and the cage marked B is on the right side. http://d.pr/i/luYI
Or watch this video here which covers these items in more detail: http://blog.coralvue.com/maxspect-gyre-step-step-assembly-advanced-troubleshooting/
Also can you please provide me with proof of purchase and the serial number off the magnet mounting bracket?