File or grind according to instructions for best performance. Proper chain tension helps to ensure long chain life and safer cutting. A chain that is too loose will tend to derail and whip about dangerously. On the other hand, a chain which is too tight will bind and wear prematurely. All chains stretch with use and frequently need checking and readjusting.
Good lubrication helps to prolong chain life and maintain tension adjustment.
Check the oil often and refill according to instructions. Be sure to use the correct bar oil. Always use both hands when starting a chain saw, one to hold the saw and the other to pull the starter rope. Some chain saws can also be held down with a foot while starting Check the owner's manual for additional starting information. It is not a safe practice to start a chain saw while holding it in mid-air with one hand.