I will admit to not owning a TH engine. However I have owned ST engines. Yes a TH makes lots of power. But from what I have seen and read it does so at high rpm's. I personally do not like that type of engine. The ST will swing a bigger prop with more authority at lower PRM's. That is the reason for my reply. I also have sen many complaints on this engine here. Many can be fixed with proper sealing and tweaking. But You should not have to do that with any engine. The St will not do this. As several other poster's have said the Th is a crap shoot. With the prices the way they are I cannot see the value in the Th engines.

Mark Shuman