How To Measure Chainsaw Bar. A good way to be certain the chainsaw will not accidentally turn on is to remove the spark plug wire. We are going to show you the easiest methods for measuring the bar and for determining the required length of chain.
Place one end of the tape measure at the point where the motor casing ends and the metal blade begins. The correct length is called the actual length of the chainsaw bar. This is the actual, “true” length of the blade, so you don’t need to make any approximations.
To determine the chainsaw bar size, simply take a tape measure to measure from the motor housing body, down the length of the bar to the tip of the bar.
To measure the exact length of your bar, you need to open your chainsaw and remove the bar. Measure the bar from head to toe using the measurement tape. You should ensure that the chainsaw is switched off and unplugged before you attempt to measure the bar length. This will give you how long the bar should be.