Posted by Tom in TN on June 01, 2010 at 07:06:25 from (4.152.159.108):
Hey All,
I have an old Craftsman lawn tractor that I bought at an auction a couple of years ago. I don't know how old it is, but it's in very good shape.
It has a 12 horsepower, overhead valve Tecumseh engine. It has run well for two years, but now, it appears to be overheating. It runs and cuts well for about 20 minutes, then it bogs down in tall grass. If I shift to a lower gear it runs fine, but eventually I have to go down to first gear to keep going.
Yesterday, I noticed that the gas in the gas tank is actually boiling when it gets to the point of bogging down.
I'm GUESSING that the intake valve is not seating properly, allowing compression to get back into the carburetor/gas tank causing the engine to starve for fuel.
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Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
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