It disconnects right at the engine casing leaving you with the long plug. Mine have always seemed rather tight to take off. I don't know if it would work but what you could try is to let the engine cool right down and then see if you can get the plug out. Then reinstall it finger tight , warm up the engine and change the oil. When heat is applied to metal it expands, making the tolerance tighter. Cooling down may relieve some of the pressure. It's worth a try.
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