I bought a Tower Hobbies .46abc did the complicated break in procedure exactly as printed in the instructions, I have run 2 gallons of PowerMaster 10% through engine. It will only tach 10700 to 10900 with a APC 10x6. I switched to 15% no improvement. I did the break in procedure again and no improvement, the engine has no compression and no power. I have checked all things, backplate, carb mount etc. I called Tower hobbies and they reffered me to Hobbico for warranty. I called them to request a new cyl and piston instead i get this customer service rep that implied since I switched nitro percentages I had to do the break in procedure again so the engine could get used to it, then wanted me to mail in engine at my expense to be checked out by them. What do you think?[
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