The oil pump delivers lubricant to the bar and chain of the STIHL chainsaw. It is driven from the engine shaft and works while the saw is running. Manufacturer: EMAS.
Signs of a fault: the bar is dry, the chain overheats and smokes, oil is barely consumed. Before replacement, clear the oil channel and check the hose and the pump drive.
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.
