ORIGINAL: da Rock
If you feel the need to got to pm's that's what the option is there for.
On the other hand, yetti831 asked specifically for an opinion of whether or not the OS55 and the TH46 were equal and seemed to state that they both advertised 1.75hp @ 16,000. So it's quite sensible to answer that question right up front. And to discuss the power@rpm issue too.
Heh, We took the tuning discussion over to PM's so as not to "pollute" the thread with something that was unrelated to the original post. e.g. how to get his T.H. working properly...
Re: TH .46 versus OS .55.
As indicated Tower loves to inflate their marketing figures. The .55 AX should be more powerful than the TH .46.
But that would be the same as comparing the power output from say a .75 AX versus the O.S. .46 AX, the larger displacement will win...
It's another matter if we are taking about dissimiliar engines such as an O.S. .46 LA versus the .46 AX...