Some saws with autotmatic oiling will leak bar oil into the cylinder and cause this. Pull out the spark plug and hold the saw so the oil runs out of the spark plug hole. Pull the starter cord till no more oil sprays out of the hole.Clean the oil off the plug and start your saw. It will smoke more than normal till the extra oil is burned out.
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Some saws with autotmatic oiling will leak bar oil into the cylinder and cause this. Pull out the spark plug and hold the saw so the oil runs out of the spark plug hole. Pull the starter cord till no more oil sprays out of the hole.Clean the oil off the plug and start your saw. It will smoke more than normal till the extra oil is burned out.