The Tower Trainers are a very fine Trainer Plane, but those Tower .46 engines are the absolute worst! I have owned two Tower .46 engines and both were horrible. They produce good power, but are the most aggrivating engine I have ever had to keep in tune. I have around a dozen flying Airplanes with various different 2 stroke and 4 stroke engines, and I have plenty enough experience in tuning an engine. I found the Tower ,46 more headache than it was worth. A cheap little O.S .46 la would be a much more dependable engine to have mounted on that Tower Trainer, or a Thunder Tiger Pro .46 if you want a quallity engine that can move on to other planes later down the road. Actually just about any other .46 size engine from just about any other manufacturer will be a better engine than the Tower .46 IMO.

Someone will probally come in here, and tell you that you need to try this and try that with it, but please listen to all the bad experiences with the .46 Tower and get rid of that thing before it causes many more deadsticks and a potential crash!