Banjo, certain small engines require the valve clearances to be set an certain amount of piston travel AFTER TDC for the compression release to function properly.
Don't know if that's the case with your engine, but if it IS and you are checking the valve clearance at TDC instead of where the mfg. states it should be set the compression release function won't work and the engine will act as you describe.
Are you checking the valve clearances as the engine-specific shop manual dictates?
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Today's Featured Article - A Lifetime of Farm Machinery - by Joe Michaels. I am a mechanical engineer by profession, specializing in powerplant work. I worked as a machinist and engine erector, with time spent overseas. I have always had a love for machinery, and an appreciation for farming and farm machinery. I was born and raised in Brooklyn, New York. Not a place one would associate with farms or farm machinery. I credit my parents for instilling a lot of good values, a respect for learning, a knowledge of various skills and a little knowledge of farming in me, amo
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