Your chainsaw chain is probably too tight.

But you don’t want it loose either. Here’s the simple way to get it right.

A chain that’s too tight binds the bar, wears out the sprocket, and makes the saw work harder. You’ll see smoke, smell burning oil, and the chain won’t spin freely when you release the brake. Too loose and the chain can derail or slap around, which is dangerous and dulls the cutters fast. Neither is good, but overtightening is the more common mistake.

Adjust it with the bar nut loose. Lift the bar tip slightly and turn the tension screw until the chain touches the bottom of the bar rails but still pulls freely by hand. Then tighten the bar nut. Spin the chain by hand—it should move smoothly with no sag. If it’s tight enough, the chain will stay snug on the bar when you let go.

A quick test after running: release the brake and give the chain a tug. It should snap back against the bar, not droop. But if it’s stiff, you went too far. Loosen the bar nut, back off the tensioner a quarter turn, and re-tighten.

Do this every time you refuel. It takes 30 seconds and saves your bar and chain.