Jonsered CS2166 Parts Manual

To start the Jonsered CS2166 chainsaw, first ensure the chain brake is engaged. Set the choke to the full position if the engine is cold. Pull the starter handle until the engine fires, then move the choke to the half position. Pull the starter again until the engine starts. Release the chain brake before use.
The recommended fuel mixture for the Jonsered CS2166 is 50:1, which means 50 parts gasoline to 1 part two-stroke oil. Ensure that you use high-quality oil and gasoline with an octane rating of at least 90.
If your Jonsered CS2166 won't start, check for fuel issues by ensuring the tank has fresh fuel. Check the spark plug for wear or damage and replace if necessary. Ensure the air filter is clean, and inspect the fuel filter for clogs. Finally, verify that the ignition switch is on and the choke is correctly set.
Sharpen the chain whenever it shows signs of dullness such as producing sawdust instead of wood chips or requiring more pressure to cut. Generally, sharpening after every few hours of use is recommended, depending on the type of wood being cut.
Regular maintenance for your Jonsered CS2166 includes cleaning the air filter, checking and tightening the chain, inspecting the guide bar for wear, and cleaning the cooling fins on the cylinder. Also, ensure the sprocket is lubricated and the chain brake is functioning properly.
To replace the chain, first engage the chain brake and remove the chain cover by loosening the nuts. Remove the old chain and carefully thread the new chain onto the sprocket and guide bar. Ensure the teeth are facing the correct direction, then reattach the cover and adjust the tension before securing the nuts.
If the chain on your Jonsered CS2166 keeps coming loose, it may be due to improper tensioning. Ensure the chain tension is correctly adjusted according to the user manual. Also, inspect the guide bar and chain for wear and replace if necessary. Regularly check and tighten the nuts securing the bar.
To winterize your Jonsered CS2166, clean the chainsaw thoroughly, empty the fuel tank and run the engine until it stops to clear the carburetor. Remove the chain and guide bar, clean and oil them to prevent rust. Store the chainsaw in a dry, cool place.
To check if the chain brake on your Jonsered CS2166 is working, place the saw on a stable surface. Engage the brake and attempt to pull the chain manually. The chain should not move if the brake is functioning correctly. If it moves, the brake may need servicing.
If your Jonsered CS2166 is overheating, check for airflow obstructions by cleaning the cooling fins and air intake. Ensure the chain is properly lubricated and not overly tight. Avoid using dull chains, as they require more power and may cause overheating.