It is the ethanol in the gas. It evaporates and what is left doesn't burn very well and is sticky. On my gas engines that I don't use very often I try to get gas without the ethanol and put "Sea Foam" gas treatment in every tank. I get about one carburetor a week that just needs the stale gas cleaned out of it. You need a good carb. cleaner too. I was using a cheap brand and if you checked the parts after they dried off they where still sticky. I use Gum out brand now and it seems to clean better. I even had a new tiller that was used once last fall. It had the kill switch on the spark plug. So when you killed it the engine draws gas in as it spins down. That raw gas gummed up the intake valve so bad by this spring that I had to remove the head and valve to wire brush the varnish off of it. The tiller would hit once and coast to a stop. Then the valve would slowly return and it would hit once again. I fear that in a few more years that our older gas engines are going to be hard to keep going with the gas available.
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Today's Featured Article - Tractor Implements and Their Use - by Curtis Von Fange. Dad was raised during the depression years of the thirties. As a kid he worked part time on a farm in Kansas doing many of the manual chores. Some of the more successful farmers of that day had a new time saving device called a tractor. It increased the farm productivity and, in general, made life easier because more work could be done with this 'mechanical beast'. My dad dreamed that some day he would have his own tractor with every implement he could get. When he reached his early sixties
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