1.  Chain Catcher

The Chain Catcher is a metal or plastic guard designed to prevent a broken or derailed saw chain from striking the operator. See figure 1 in the parts photo.

2.  Flywheel

The flywheel is a weighted wheel that controls engine speed and assists in cooling the engine. See figure 2 in the parts photo.

3.  Clutch

The clutch, attached to the chain sprocket, is the connector that controls the driving part of a saw. See figure 3 in the parts photo.

4.  Decompression Valve

The important decompression valve releases saw compression which allows easier starting. See figure 4 in the parts photo.

5.  Anti-vibration Handle System

The anti-vibration handle system of handle shocks is recommended to limit ergonomic stress to the operator's hands, arms and joints. See figure 5 and 7 in the parts photo.

6.  Hand Guard

The hand guard is a defensive plastic shield that protects users’ hands from kickback. See figure 6 in the parts photo.

7.  Muffler

The muffler is a hearing protection device used on chainsaws to reduce engine noise. See figure 8 in the parts photo.

8.  Chain Brake

Adding a chain brake to all saws was a safety requirement enabled in February, 1995. The function of the chain brake is to stop the chain if kickback occurs to prevent user injury. See figure 9 in the parts photo.

9.  Throttle

The throttle regulates a saw's RPMs by increasing or decreasing the volume of fuel to the cylinders. The chainsaw will stop the chain when pressure on the throttle is released. See figure 10 in the parts photo.

10.  Throttle Interlock

The throttle interlock locking mechanism prevents the throttle from activating until the interlock is depressed. See figure 11 in the parts photo.