A chainsaw’s carburetor mixes air and fuel to start the internal combustion engine. If fuel has been left in the engine for too long, it can become sticky and clog the carburetor, preventing it ...

If your STIHL chainsaw won't start, it might be trying to tell you something. With some patience and the right checklist, you can often get it running again.

As far back as 2003, Honda developed its first fuel injection system for a 50cc 4-stroke engine, and the major chainsaw brand Stihl currently offers a fuel-injected chainsaw.

3. Carburetor: Delivers a mixture of fuel and air to the engine. This one optimizes the fuel-to-air ratio by continually changing the amount of fuel—in tests that last mere milliseconds. 4.