hawk3ye-

I have a couple of thoughts.

When troubleshooting any system, reduce it to its simplest configuration and test each component. Eliminate as many variables as possible.

Start with one motor, no Y harnesses, and no servos. Then test the second motor, again by itself. Only when you are sure each motor and ESC works by itself should you try connecting them at the same time. Don't connect any servos until your motors are working properly.

I believe some ESCs require that the BEC on one of the ESCs be disabled when you connect them to the receiver in parallel. You might give that a try.

Also, Futaba transmitters require that the throttle channel be reversed to work with an ESC. If you have never used this transmitter with other electric powered planes, then the throttle channel may need to be reversed.

- Jeff