With all that use, eventually you'll need to replace your chainsaw bar or chain. But before you buy, know the exact size of each. "Using the wrong size bar or chain can damage the chainsaw and ...

For the large saws (18- to 20-inch bars) I used a 14-inch diameter black willow log. I timed how fast each model could saw through the log (averaging three times). For a control, I also ran my gas ...