Craftsman CMCCSL621B Instruction Manual
![Craftsman CMCCSL621B Chainsaw manual cover](/images/gaxtRiWzlJFrWSSfCwTXlsKZ/thumbs/thumb175x175.webp)
To properly tension the chain, ensure the chain brake is engaged, then turn the tensioning screw clockwise to tighten or counterclockwise to loosen. The chain should sit snugly against the bar but still move freely when pulled by hand.
Use a high-quality bar and chain oil specifically designed for chainsaws. This oil provides necessary lubrication and reduces friction during operation.
Clean the air filter after every 5 hours of use or more frequently in dusty conditions to ensure optimal performance and longevity of the engine.
Ensure the chain brake is engaged, switch the power button to the on position, and press the trigger lockout before squeezing the trigger to start the chainsaw.
If the chainsaw doesn't start, check if the battery is correctly inserted. Inspect the battery contacts for dirt or corrosion, and ensure the chain brake is disengaged.
Clean the chainsaw thoroughly, remove the battery, and store it in a dry, cool place away from direct sunlight. Ensure the chain and bar are properly lubricated to prevent rust.
Check if the chain is properly tensioned and ensure the bar is securely fastened. Inspect the chain for damage or dullness and replace if necessary.
Use a round file that matches the chain's pitch and file each cutter at a consistent angle. Ensure all cutters are filed evenly to maintain balance.
Regularly inspect the chain tension, clean the air filter, check the bar and chain oil levels, and inspect the chain for sharpness and damage.
First, remove the battery for safety. Loosen the bar nuts, remove the old chain, and place the new chain on the bar ensuring it fits correctly around the sprocket. Adjust the tension and tighten the bar nuts securely.