Breaking in a New Chain
Put the chain in a disposable pie pan, pour bar oil over it and let it soak for an hour or so to thoroughly lubricate the pivot points. Install the chain and tension it. Run the chain saw with no load at half throttle for several minutes until the bar and chain are warm. Shut off the motor, let the chain cool and then re-tension the chain.
Maintain a light load (only small limbs and branches) for the first half hour and make sure the chain has extra lube. After a half hour, let the chain cool and then re-tension it. Then you’re good to go.