If this is a DA50, break it in in the air. Running it on the ground will over heat the engine and it's not good. Run 2-3 gallons of lawnboy ashless and then switch to amsoil 100:1.
As long as settings are not extremely rich or extremely lean, you will not get a deadstick so don't worry about that. Do you have a pull-pull system? I'm thinking maybe your pull-pull cable near your anettena causing some interferance. It's not a bad idea, that you run a nyrod over one of the pull-pull cable if they cross each other.

Good Luck