Why not what is so bad about a tecumseh. Talk is easy, because of experience or someone told you so? I sure have has more problems with Honda and Kawasaki then Tecumseh. This pass summer I have repaced a cam shaft in a Honda ATV with very low miles and a Kawasaki in a John Deere that the intake valve broke off and went through the piston. When I bought parts for the Kawasaki at the salvage yard the salvage yard told me that he sells more parts for a Kawasaki then any other engine. The biggest job I had on a tecumseh this pass summer is a valve adjustment. Now you must have a opinion why a tecumseh is not as good as a Honda or Kawasaki that is better then mine?? Lets hear it. Do you do a lot of repairs on all three engines??
I guess you could call it experience, I guess over the years I've been around enough people who owned Tecumseh motors, cussed there existence and seen them end up in the trash too know how good they are. If I'm not mistaking (not sure) but I believe they stopped making the things didn't they?
As far as the Honda and Kawasaki mower engines go, I run both and have run the Honda's for years and as of yet have ever had a problem with a Honda engine and my Kawasaki I've had for three years and not one repair.
I Personally wouldn't give you a nickle for all the Tecumseh motors that have ever been made, same with B&S but then again that's just my opinion which I guess I'm entitled too as you are yours.