Lift the chain off the bar and roll it over so the cutters face upwards. Be sure, absolutely sure, that you put the chain on right side up and facing in the right direction or it won’t work. Not only will it not work, it could kill you.
It would be highly weird to have the chain flip over without destroying the chain, the saw, or the operator. The bottom of the cutters also look a lot like teeth but they aren’t sharpened. They are just points that fit into the bar groove and grab the drive wheel. The actual cutting part is the L shaped teeth that have to be facing outwards and they have to be rotating in the proper direction or you have a dangerous and expensive grinder. Which direction? The blade moves AWAY from the operator at the top of the saw.
After you are sure the chain is in properly and fully seated in the bar’s groove you adjust the bar so there is only 1/8th inch slack from the bottom of the chain to the top of the bar when you lift up on it in the middle of the bar. You MUST NOT be able to see the bottom of the drive teeth! There is normally a screw adjuster at the back of the bar to set it. After setting the tension tighten the two bar mounting bolts SNUGLY!!
WARNING! Those are general rules for a chainsaw. They may not apply to yours and a misadjusted or improperly assembled chainsaw can KILL you! A sharpened pound of steel traveling at 100 mph will take off an arm, leg, or head!
If you are unsure, consult a local saw shop or someone that knows about saws and that can set your chainsaw properly. No one can see your saw on this forum so there is no way to know if it’s put together right or wrong.
.
