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 - 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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