Posted by GarryinNC on May 12, 2016 at 19:20:19 from (66.226.46.50):
In Reply to: 100LL Avgas posted by Eric in IL on May 12, 2016 at 07:18:01:
When Avgas evaporates, all that is left is a faint amount of blue dye, no 'varnish', no gummy anything. When left in small engines, no gummed up idle jets and main jets, etc. I have been using it in string trimmers, chain saws, small dirt bikes, 4 wheelers with no problems. They can sit all winter and start right up. Some complain of hard starting because of the vapor pressure, but I have not found that to be the case.
The string trimmer that I use the most will have some lead residue build up on the spark plug, mainly the ground electrode. If left alone it will eventually short across the gap, I clean it with wire wheel or even a pocket knife. The spark arrestor screens in the exhaust of trimmers and the like can also get the same build up, but like Nik Owen said, it takes several hours. Smells good when it comes out of the exhaust too, like the airport used to smell. I hate to see it phased out.
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Today's Featured Article - Third Brush Generators - by Chris Pratt. While I love straightening sheet metal, cleaning, and painting old tractors, I use every excuse to avoid working on the on the electrics. I find the whole process sheer mystery. I have picked up and attempted to read every auto and farm electrics book with no improvement in the situation. They all seem to start with a chapter entitled "Theory of Electricity". After a few paragraphs I usually close the book and go back to banging out dents. A good friend and I were recently discussing our tractor electrical systems when he stated "I figure it all comes back to applying Ohms Law". At this point
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