I have the same model and I had to lean out the engine at first, but after that it ran perfect.  For the prop, make sure you are using a 7/16" wrench and NOT an adjustable, as it seems like you can never get it that tight with an adjustable. 

Also, if I were you, I would contact customer service for Horizon Hobby (the distributor of Hangar-9 and Evolution Engines).  They have outstanding service and will be able to help you out or even replace whatever is needed.  I have never had such a great experience with customer service as I did with them...

Good luck with your plane...hope it all works out for you.