Saw Again, Tradebit and the U.S. Forest Service have chainsaw parts diagrams available. As of 2015, Saw Again has parts diagrams for nine brands, including Jonsered, Makita, Stihl, Sachs-Dolmar and McCulloch. The diagrams are available to users for free. This website also sells chainsaw parts and provides chainsaw reviews.
The U.S. Forest Service has chainsaw parts diagrams for educational purposes. The website explains what each part is called, what its purpose is and some fine details. It also has information about different types of chainsaw parts and chainsaw maintenance.
On Tradebit, users can pay to download chainsaw manuals that contain parts diagrams.