Mark, My choices are limited to shell and marathon. I use marathon. Shell is a greater distance. I'm going to continue my ethanol experiment, marathon gas hasn't worked in the past 6 years. Ethanol is working.
In the winter, my Jubilee carb has to be richened by two full turns on main jet or it will stumble under load. If the kohler has an issue with colder winter air, which it hasn't in the past, I'll reduce the ethanol ratio.
Ethanol is the only way I've been able to lean down mix. Been thinking of a way to determine if I'm lean of peak, but measuring temps on an engine I only operate at half rpms won't work. Buying an O2 sensor for exhaust is over budget.
So monitering plugs and looking at top of piston is my only way to see what's going on inside engine.
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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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