I have tried several times unsuccessfully to break in my engine. I think the model is something similar to TTR40 Thunder Tiger 40 RC Engine...

Basically, what happens is that even though I follow the instructions, the engine always seems to instantly rev up so high that it sounds like it is going to explode. I always end up getting scared and turn it off prematurely. I obviously don't have much experience with R/C stuff, but I have seen others flying their airplanes so I think I know when an engine sounds liek it is revving at normal levels versus when it is too high. Anyone have any idea what I'm talking about?

Thanks in advance!