I am looking for a little help. I have an older Troy Built Horse (rear tine tiller) with a 6-7 hp Tecumseh horizontal shaft (vertical piston). I was going to take the carburetor off to clean it, until I discovered that I could not remove it. It appears that the carburetor is bolted to an intake manifold via 1/4" studs. The studs are turning inside the "intake manifold" when the nut(s) is/are turned with a wrench. Any idea on how to remove the nuts? It is looking like I will have to cut down through the nuts with a dremmel tool. I don't have the Tecumseh Service Manual, so I have no idea if these are actually studs. If you have a Tecumseh Service Manual, an exploded view or parts schematic might be of help. Suggestions are also appreciated. Thanks in advance. I bet I would NOT have this problem with a Briggs motor!