Had trouble getting my M to run after running perfect for several hours multiple times. Would buck and snort, wind down and stop. Turn off the ignition for 2 minutes, would start right up aned fail after 10 minutes, progressively shorter. Changed Capacitor, points, wires (oily and 3 years old). Changed the coil. New one had cracks in it, put back old, no change. Still failed. Checked the gas tank, Surprise found 2.5 blue shop towels in it, removed them (one at a time) when I found them. Still a problem. Hole in cap wide open. Cleaned out the water separator, had the carb rebuilt, still nothing. Opened the governor, found the linkage to far clockwise, would not return to idle position. Found the accelerator linkage frozen, loosened it up, still having problems. When the governor is in the right position, idles beautiful, raise the throttle runs good til it needs more power, then the governor moves to far, starts bucking and missing, back firing etc. WTF. Any ideas?