Neo1,

What is the ground altitude you are flying at?
What fuel are you using - nitro% and Oil %
Does the engine hold a good idle now?
Have you run the engine in a test stand, and does it perform differently than in the plane?
Two pounds (32oz)! Is ALOT of weight for a .15 size engnie. A highly aerobatic .15 size plane should come in around 24-28oz.
Frankly in the .25 size and down Norvel engines reign supreme in power to weight ratio and the AP engines are dogs. (sory)
Small engines usualy need nitro %'s in the 20% to 25% range to perform well and be sure you run at least 20% oil.
Also be sure 20 -30% of your oil content is CASATOR not synthetic. THIS IS VERY IMPORTANT!!!!. Small engines generaly run hotter due to there constriction, and the higher nitro used to make them run well. Castor Oil wil not break down and loose it's protection properties at these higher temps like Synthetic oils (Klotz etc.) will. Whatever fuel your using add some pure castor to it to bring the oil content up to at leat 20 %, 22%-24% would be better. I have loads of other variables to dink with. PM me and we'll talk about it

Darren

Also, I would contact the MFG, You followed their recomendations so the motor should be "monster" as adveritised. You broke in the engine per their recomodations, so if the motors a piece of crap EFFEM send it back!