I also have a MF135 and have had to replace the original mechanical voltage regulator with an electronic one. The mechanical regulator had a resistor on the 4th terminal that cut the voltage to approximately 4 volts for the fuel gauge. You cannot just hook the fuel gauge to 12 volts as it will peg the gauge. The new electronic regulator leaves that resistor out. I simply got an adjustable potentiometer (0 - 10K) and put it in line from the 4th terminal to the gauge. Empty your fuel tank and fill it with 5 gallons which is half full and adjust the potentiometer until it reads half full. There are sites that sell the mechanical voltage regulator but they or $95. The potentiometer is way cheaper.
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Today's Featured Article - An Old-Time Tractor Demonstration - by Kim Pratt. Sam was born in rural Kansas in 1926. His dad was a hard-working farmer and the children worked hard everyday to help ends meet. In the rural area he grew up in, the highlight of the week was Saturday when many people took a break from their work to go to town. It was on one such Saturday in the early 1940's when Sam was 16 years old that he ended up in Dennison, Kansas to watch a demonstration of a new tractor being put on by a local dealer. It was an Allis-Chalmers tractor dealership,
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