Two measurements are 1 5/16th with carb upside down, measured from what is now top of float to the carburetor without gasket. Other is 1 15/16th float drop measured to lowest point of float when turning carb back right side up. The drop is easy to adjust with that little tab on float. Height can be real tricky. I have bent hundreds of those M floats over the years by getting a pliar in the right position so you do not damage float. This is tricky and has to be done with care and diligence. Ideally, if you could find thinner or thicker gasket under needle and seat works the best. Now, keep in mind , that float has to not touch sides of carburetor. Also, the hinge pin has to fit tight in bracket. You bend the split in bracket before inserting pin,use a small screwdriver in that slot when installing pin so pin will slip in but be tight when in place. It sounds to me like you have a needle sticking in the seat. May have to polish edges a little so it moves freely. Needle should drop down with out any persuasion when you invert carburetor back and forth.
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Today's Featured Article - Tuning Up Your Tractor: Cooling and Fuel Systems, Hoses and Belts - by Curtis Von Fange. Our tractor is coming right along. The old oil and filter has been taken to the recycler and the air filter replacement has breathed new life into our motor. Let's take a closer look, now, at the cooling system since it has to work so hard in the summer heat. Cooling systems can be real cantankerous in their old age. Radiator cores clog up with rust, lime or other mineral deposits and the fins clog up with weed seeds and debris. The metal headers slowly corrode away from years of use and
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