All chain saws have a sprocket that the chain runs on this sprocket is what make the chain rotate on the bar. the bar is the long part that sticks out in front of the motor. you must remove the side cover of the saw to access the sprocket region of the saw. be sure the saw is unplugged and then remove side cover the bar is usually held in place by a couple of bolts. on gas saws these two bolts also hold the side cover in place and must be removed to replace the bar and chain. once you have removed the side cover look for bolts holding the bar in place. if you only want to change the chain then you may be able to only loosen the bolts or screws holding the bar in place.there should be a screw to adjust the bar forwards and backwards. this screw put tension on the chain so when you put a new chain on turning the screw will proberly tension the chain /do not overtighten the chain. also be sure you put the new chain and blade on the same as the old one that comes off trying to cut with a chain that is on backward does not work. last note if you are replacing the blade because the old one is dull take the saw to a saw shop they can sharpen the exsisting chain and save you money.
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All chain saws have a sprocket that the chain runs on this sprocket is what make the chain rotate on the bar. the bar is the long part that sticks out in front of the motor. you must remove the side cover of the saw to access the sprocket region of the saw. be sure the saw is unplugged and then remove side cover the bar is usually held in place by a couple of bolts. on gas saws these two bolts also hold the side cover in place and must be removed to replace the bar and chain. once you have removed the side cover look for bolts holding the bar in place. if you only want to change the chain then you may be able to only loosen the bolts or screws holding the bar in place.there should be a screw to adjust the bar forwards and backwards. this screw put tension on the chain so when you put a new chain on turning the screw will proberly tension the chain /do not overtighten the chain.
also be sure you put the new chain and blade on the same as the old one that comes off trying to cut with a chain that is on backward does not work. last note if you are replacing the blade because the old one is dull take the saw to a saw shop they can sharpen the exsisting chain and save you money.