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Welcome to the STIHL USA Blog

Monday, December 14, 2015

Careful Cutting - Working in a Winter Wonderland

Tips for Cold Weather Chain Saw Operation
By Randy Scully, National Service Manager for STIHL Incorporated

With the onset of winter, thoughts shift to some of the challenges of winter chain saw operation. With a little extra care, your chain saw can offer peak performance even in the face of extreme cold temperatures. Please remember that STIHL recommends use of fuel with no more than 10% ethanol content. Using fuel with greater than 10% ethanol content may cause damage to your equipment and may void your STIHL warranty. Learn More

You will also need to take extra precautions for specific weather-related hazards.

Personal Protective Equipment

While working with a chain saw during the winter, as always, wear protective apparel, such as chaps, hearing protection and gloves. In the winter, wood is even more likely to splinter, so use of a helmet and eye protection remains critical. Some manufacturers offer winter protective pants made with materials that are both cut retardant and resistant to water and snow, providing an option to the protective leg wear you would normally wear.

Winter Chain Saw Maintenance and Operation

The first thing to do to prepare your chain saw for use in temperatures under 40° F is to switch the winter/summer shutter on your saw to “winter” to activate the carburetor pre-heater system, if your chain saw has this feature. Leaving the shutter on the summer position could result in carburetor icing, causing the machine to perform poorly, idle erratically, and even run lean, which could eventually cause major engine failure.

Your chain saw will require some extra maintenance during winter. The following are some basic recommendations:
  • Be sure to keep the sprocket cover clean to prevent snow and moisture from freezing with sawdust and oil that normally collect around the sprocket area.
  • Clean the chain brake more often, especially with chain saws that have the chain brake in the sprocket cover.
  • Remove snow from around the fuel tank opening before refueling, so snow doesn't fall in the tank; water and moisture in the fuel can cause unnecessary aggravation.
  • Keep the anti-vibration system free from snow and ice that could freeze and affect operation of the anti-vibration system, resulting in increased operator fatigue.
  • Wipe away any snow, ice or water droplets from around the throttle trigger and throttle trigger interlock to ensure they remain operational.
  • Also keep the cooling air intake clean and free from snow, ice and sawdust to prevent your engine from overheating. Take care that bulkier winter clothing does not get sucked up against the cooling air intake. This can restrict air flow and cause major engine failure.
  • Be extra attentive to risk-reducing features and control mechanisms on your chain saw and keep them clean.
Special Weather-Related Precautions

Be aware that the ground might be frozen and slippery. You will need solid footing with good traction. With all your winter tree work, take extreme care in the freezing weather. When it's windy, stormy or rainfall is heavy, consider delaying the work to avoid hazards.

Since frozen wood is harder than non-frozen wood, you may want to decrease the saw chain’s filing angle by five degrees. Decreasing the chain’s angle increases cutting performance in frozen woods and decreases the wear to your guide bar and saw chain. You can learn more about care and maintenance of your saw chain and guide bar in our manual. Or you can watch this video on sharpening your chain on our YouTube channel.

Keep ice from building up on the handles of your chain saw to prevent your hands from slipping off the machine. Before you start felling, try to remove the snow around the trunk of the tree and knock off as much snow and ice as possible from low hanging limbs, which pose an increased risk of distraction from falling snow while you are cutting the tree.

As you face the challenges of winter work, taking a few extra maintenance steps and being extra alert to potential hazards can increase the productivity of your equipment and reduce the risk of injury.

Randy Scully is product service manager for STIHL Inc., based in Virginia Beach, Virginia.


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