That Tecumseh 2 stroke caught my eye too!
I'm with Russ on the Tec vs B/S debate. I think B/S excelled because they perfected the Butt-Simple engineering that a typical utility engine requires. They're not always well cared for, frequently abused, and expected to always run after months of storage. A B/S, with almost it's entire fuel system contained inside the gas tank (genius!) is alot more forgiving to bad treatment. As Russ and a few others in threads (myself included) have pointed out, the Tec suffers from it's "standard" carb arrangement, which wears it's age and signs of neglect on it's sleeves, so to speak. Mechanically, non of my Tecs have given me trouble, but ALL of problems ended up being the carbs;.. ...filled with MickeyMousite and gremlins, requiring new gaskets and cleaning.
No experience with either of the OHV motors from the Big Two.
Sorry! !
Back to IronMan's question, will these Tec 2 strokes rev up like the LawnBoys and the B/S motors? If so, then they seem to be a pretty good deal. I think the 5hp is 139cc.