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Chainsaws - Safe Use of Chain Saws

What are some general tips to know when using chain saws? Only use chain saws that you have been trained to use properly and safely.

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What are some general tips to know when using chain saws?

context Only use chain saws that you have been trained to use properly and safely.
context Read the owner's manual carefully.
context Make sure you understand instructions before attempting to use any chain saw.
context Review pertinent health and safety legislation before operating a chain saw.
context Operate, adjust, and maintain saws according to the manufacturer's directions and to standards such as the CSA Standard Z62.1-15 (R2024) "Chain Saws" or ANSI standard B175.1-2021 "Outdoor Power Equipment - Internal Combustion Engine-Powered Hand-Held Chain Saws - Safety and Environmental Requirements". Both standards describe safety requirements for the design of chain saws and include recommendations on how to use chain saws safely.
context Operate the chain saw in well-ventilated areas only.
context Wear personal protective equipment and clothing. For more detailed information, see OSH Answers Chain Saws—Personal Protective Equipment.
context Ask questions if you have any doubts about doing the work safely. Safety procedures that you follow will also depend on where the sawing is carried out (e.g., on the ground or at height in a tree or elevating device) and what kind of hazards are present, including trip, slip, snag, and fall hazards.
context Only operate saws when you are well-rested. Fatigue causes carelessness. Be cautious before breaks and at the end of the shift.
context Have all required supplies and equipment with you before you start the work.
context Be aware of your surroundings – weather conditions, terrain, wildlife, buildings, powerlines, vehicles, and other people.

What are some safety tips to know when starting the saw?

DO DO NOT

ppe Use only chain saws that have been manufactured and maintained appropriately, and that are equipped with a safety chain and chain brake. Check legislation in your jurisdiction for other requirements.
requirement Know how to use the controls before starting a chain saw.
engineering Remove the chain bar guard (scabbard) and inspect the saw and machine for damaged, loose, missing parts, or other signs of wear, or leaks around the engine before starting. See OSH Answers document Chain Saws - Maintenance and Service.
requirement Ensure that the guide bar is tight and the chain fits snugly without binding. Adjust the chain tension, if required.
administrative Inspect the saw chain to ensure it is properly lubricated and sharp. Sharpen and lubricate, as needed.
requirement Check the air filter and clean it when needed.
requirement If present, check the muffler spark arrestor screen. Spark arrestor screens help reduce the risk of fire, especially in dry forest conditions.
administrative Inspect the chain catcher. It helps reduce the risk of injury when a chain breaks or comes off the guide bar.
requirement Ensure that the chain is clear of obstructions before starting.
requirement Engage the chain brake before starting the chain saw.
requirement Ensure that you have secure footing and that your stance is well-balanced.
requirement Hold the saw firmly on the ground using your foot, or by holding the powerhead down with one hand. Point the chain away from your body and nearby obstructions. Use a quick, sharp motion on the starter cord.
requirement Warm up the saw prior to cutting. The saw should idle without the chain turning. If the chain continues to turn after the throttle switch is released, stop the saw. Then adjust the idle as shown in the owner's manual.
engineering Check that the throttle trigger, throttle trigger interlock, master control lever, etc. are operating properly.
requirement Do not use a saw if it is damaged, improperly adjusted, or has loose or missing parts.
requirement Do not "drop start" (starting a saw while only in your hands) or when a chain saw is touching your body. This method leaves only one hand to control a running saw and can result in leg cuts.
requirement Do not start a saw unless it is at least 3 metres (10 feet) from any approved fuel safety containers.
requirement Do not make adjustments to the chain or guide bar when the motor is running.

What precautions should I take when fueling a chain saw?

context Follow the manufacturer's directions for the oil/gas mixture to be used.
context Use only safety containers for storing and dispensing fuel that have been approved by standards like the CSA International B376:22, "Portable Containers for Gasoline and Other Petroleum Fuels," or by agencies like Underwriters' Laboratories (UL or ULC [Canada]).
context Do not refuel a running or hot saw.
context Dispense fuel at least 3 metres (10 feet) away from sources of ignition.
context Use a funnel or spout for pouring. Wipe off any spills.
context Mix fuel in a well-ventilated area. Keep a well-maintained fire extinguisher nearby.
context Do not smoke or allow any ignition sources while refuelling.
context For electric and battery-operated chain saws, follow all manufacturer's instructions on safe use, including how to safely charge and start the chain saw.

What should I do and not do when cutting?

DO DO NOT

requirement Plan each job before you start. Arrange to have help.
engineering Carry the chain saw by its front handle, with the muffler away from your body and the guard bar pointing behind you.
requirement Know the location of the persons working with you at all times.
requirement Use the correct saw. The weight, power, and bar length should all be suitable for the job.
requirement Operate the chain saw in a firm two-handed grip with fingers and thumb surrounding the handles. Keep both feet firmly positioned when operating a chain saw.
requirement Maintain full power throughout each cut.
requirement Ensure that the chain does not move when the chain saw is idling.
requirement Turn off the chain saw before refuelling or doing any maintenance.
requirement Keep your saw clean – free of sawdust, dirt and oil.
ppe Wear safety gloves or mitts when sharpening the chain.
requirement Take precautions to prevent kickback.
requirement Do not start a chain saw when it is resting against any part of your body.
requirement Do not stand directly behind the saw.
requirement Do not leave a saw running unattended.
requirement Do not carry chain saws while it is running. See our OSH Answer on Chain saws - Handling, Transportation, and Storage.
requirement Avoid contact with the muffler. Serious skin burns may result.
requirement Do not cut alone.