Videos
  • The choke in operation (0.5 MB)
  • Tour of the engine (10 MB)
  • Explanation of the intake and exhaust ports (7.3 MB)
  • The carburetor (5.1 MB)
  • Explanation of the crankshaft and piston (3.7 MB)
  • Whether you are a homeowner cleaning up a few trees and limbs in the yard, a farmer cutting firewood and keeping the pasture clear, or a firefighter cutting a firebreak for a forest fire, you know how handy a chain saw can be!

    Chain saws are also great when you are interested in getting up close and personal with gasoline power. If you want to see a basic two-stroke engine in its simplest application, then a chain saw is the best place to start! In this edition of HowStuffWorks, we'll learn about chain saws and two-stroke engines by completely dismantling a typical 16-inch chain saw. You will also learn how magnetos, centrifugal clutches and carbs work in the process!