Remove the bar and chain from the saw. Take these parts to a saw servicing dealer who can match the bar and chain. Be sure to clean the area where the bar mounts. Run the saw for a few moments--the oil port in the side of the case should ooze out oil. Install the bar first, then thread the chain onto the sprocket, then work it over the bar. Pull the bar out until the chain is fairly tight, then fit the cover, but leave the mounting nut(s) finger tight. Turn the chain adjuster until the chain doesn't droop from the bar, but still be able to turn the chain by hand. Tight the mounting nut(s) and recheck tension. Run the saw at full speed with the tip near some cardboard--it should throw off a thin line of oil onto the cardboard. Hope this helps!
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Remove the bar and chain from the saw. Take these parts to a saw servicing dealer who can match the bar and chain. Be sure to clean the area where the bar mounts. Run the saw for a few moments--the oil port in the side of the case should ooze out oil. Install the bar first, then thread the chain onto the sprocket, then work it over the bar. Pull the bar out until the chain is fairly tight, then fit the cover, but leave the mounting nut(s) finger tight. Turn the chain adjuster until the chain doesn't droop from the bar, but still be able to turn the chain by hand. Tight the mounting nut(s) and recheck tension. Run the saw at full speed with the tip near some cardboard--it should throw off a thin line of oil onto the cardboard. Hope this helps!