1. Safety First:
- Ensure that the chainsaw is turned off, the chain brake is engaged, and the spark plug wire is disconnected before starting any maintenance work.
2. Locate the Tension Screw:
- The tension screw is usually located on the side of the chainsaw, near the front of the bar. It is a small screw with a spring behind it.
3. Loosen the Tension Screw:
- Use a screwdriver to loosen the tension screw by turning it counterclockwise until the chain loosens.
4. Remove the Old Screw:
- Once the screw is loose, you can remove it by hand or use a screwdriver to pry it out.
5. Clean the Area:
- Clean the area around the tension screw to remove any dirt or debris. This will help ensure that the new tension screw fits properly.
6. Insert the New Tension Screw:
- Insert the new tension screw into the hole and turn it clockwise by hand until it is snug.
7. Tighten the Tension Screw:
- Use a screwdriver to tighten the tension screw until the chain is taut and there is no slack in it.
8. Test the Chain:
- Pull the chain up and down to ensure that it moves freely and is properly tensioned.
9. Reconnect the Spark Plug Wire:
- Once you're done, reconnect the spark plug wire to the chainsaw and engage the chain brake.
10. Test the Chainsaw:
- Start the chainsaw and let it run for a few minutes to test the chain tension. Adjust the tension if necessary.
11. Re-tighten the Tension Screw:
- After the chainsaw has run for a while, re-tighten the tension screw to make sure it stays in place.
By following these steps, you can safely replace the chainsaw tension screw on your STIHL MS250 chainsaw. Always refer to the chainsaw's user manual for specific instructions and safety guidelines.
