The drive sprocket transmits rotation from the clutch to the saw chain of the Master Danila chainsaw. The number 43 in the name is the saw model designation; the sprocket must match the chain pitch.
Replace the sprocket when the teeth have worn down, the chain slips or stretches quickly. You should not put a new chain on a worn sprocket: the wear will quickly transfer to it.
It is best to do the work on a cooled engine with the ignition off, and to tighten the fasteners without overtightening, so as not to strip the thread in the body.
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