How to Start a Stihl 170 Chainsaw (5 Pro Tips for Smooth Fires)
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How to Start a Stihl 170 Chainsaw (5 Pro Tips for Smooth Fires)
Imagine this: It’s a crisp autumn evening. The scent of woodsmoke hangs in the air. Inside, a warm fire crackles merrily in the hearth, casting dancing shadows on the walls. That’s the life, isn’t it? But achieving that picture-perfect scene starts long before you strike a match. It begins with responsibly sourced wood, proper preparation, and, for many of us, a reliable chainsaw like the Stihl 170. I’ve spent years felling trees, splitting logs, and stacking firewood, and I’ve learned a thing or two about getting the job done right – and safely. Let me share my knowledge to make your wood-burning dreams a reality.
In today’s world, where energy costs are rising and sustainability is becoming increasingly important, the role of firewood is being re-evaluated. According to the U.S. Energy Information Administration, wood energy accounts for roughly 2% of total primary energy consumption in the United States. In some regions, especially rural areas, that percentage is significantly higher. Globally, firewood remains a primary heating source for millions, particularly in developing countries. However, even in developed nations, there’s a renewed interest in wood-burning stoves and fireplaces, driven by a desire for energy independence and a connection to traditional practices.
But before you can enjoy the warmth of a crackling fire, you need to start your chainsaw. And that’s where this guide comes in. Forget the frustration of a stubborn engine. I’m going to give you five pro tips specifically for starting a Stihl 170 chainsaw, ensuring you have smooth fires all winter long.
Understanding Your Stihl 170: A Foundation for Success
Before we even think about pulling that starter cord, let’s get to know your Stihl 170 a little better. This is a fantastic entry-level chainsaw, known for its lightweight design and ease of use. It’s perfect for homeowners tackling smaller tasks like pruning, felling small trees, and preparing firewood.
- Engine Specs: The Stihl 170 typically features a 30.1 cc (cubic centimeter) engine. This smaller displacement means it’s not a powerhouse for felling giant oaks, but it’s more than capable for most residential firewood needs.
- Bar Length: Common bar lengths range from 14 to 16 inches. Choose a length that suits the size of the trees you’ll be cutting. A longer bar offers greater reach but also demands more power from the engine.
- Fuel Mixture: This is critical. The Stihl 170, like most two-stroke engines, requires a precisely mixed fuel blend of gasoline and two-cycle engine oil. Always refer to your owner’s manual for the correct ratio (typically 50:1 – 50 parts gasoline to 1 part oil). Using the wrong mixture can cause serious engine damage. I once saw a friend ruin a perfectly good chainsaw by consistently using the wrong fuel mixture. It’s a mistake you only make once!
- Safety Features: The Stihl 170 includes important safety features like a chain brake (activated by your wrist or manually), a throttle trigger interlock (preventing accidental acceleration), and a chain catcher (to minimize the risk of injury if the chain breaks or comes off the bar). Familiarize yourself with these features before you even start the engine.
Pro Tip #1: Fresh Fuel is Your Friend
This might sound obvious, but it’s the most common reason for starting problems. Gasoline degrades over time, especially when mixed with two-cycle oil. Old fuel can clog carburetors and make starting nearly impossible.
- The Science: Gasoline contains volatile components that evaporate over time, reducing its octane rating and making it harder to ignite. Two-cycle oil can also separate from the gasoline, leading to an improper fuel mixture.
- My Experience: I once spent an entire afternoon trying to start a chainsaw that had been sitting in my garage for a few months. After finally draining the old fuel and replacing it with a fresh batch, it started on the second pull. Lesson learned!
- Actionable Steps:
- Use Fresh Fuel: Always use gasoline that is less than 30 days old.
- Use Stabilizer: If you know you won’t be using your chainsaw for a while, add a fuel stabilizer to the gasoline. This will help prevent the fuel from degrading. Follow the instructions on the stabilizer bottle.
- Empty the Tank: If your chainsaw will be stored for an extended period (e.g., over the winter), drain the fuel tank completely. This will prevent gum and varnish from forming in the carburetor.
- Proper Storage: Store your fuel in an approved fuel container, away from direct sunlight and heat.
Pro Tip #2: Master the Starting Procedure
The Stihl 170 has a specific starting procedure that you need to follow closely. Deviating from it can lead to frustration and a sore arm.
- The Steps (Refer to your owner’s manual for precise instructions, as models may vary slightly):
- Safety First: Place the chainsaw on a stable, flat surface. Make sure the chain brake is engaged (pushed forward). This prevents the chain from moving during starting.
- Choke Position: Locate the choke lever. For a cold start, move the choke lever to the “full choke” position. This restricts airflow to the carburetor, creating a richer fuel mixture that aids in starting.
- Primer Bulb (If Equipped): Some Stihl 170 models have a primer bulb. Press the primer bulb several times (usually 5-6 times) until you see fuel flowing through the clear fuel line. This helps prime the carburetor with fuel.
- Starting Pull: Grip the starter handle firmly and pull the cord quickly and smoothly. Don’t yank it! Pull until the engine attempts to start (you’ll hear a “cough” or “sputter”).
- Choke Adjustment: Once the engine attempts to start, move the choke lever to the “half choke” position (if your model has one) or to the “run” position (if it only has full choke and run).
- Final Pulls: Continue pulling the starter cord until the engine starts and runs smoothly.
- Warm-Up: Let the engine warm up for a few minutes before engaging the chain brake and starting to cut.
- My Mistake: I remember when I first got my Stihl 170, I was so eager to start using it that I skipped the warm-up step. The engine stalled repeatedly, and I couldn’t figure out why. After consulting the manual (something I should have done in the first place!), I realized the importance of letting the engine reach operating temperature.
- Troubleshooting:
- Engine Won’t Start at All: Check the fuel level, spark plug connection, and air filter. Make sure the choke is in the correct position.
- Engine Starts But Stalls Immediately: The carburetor may need adjustment, or the fuel filter may be clogged.
- Engine Runs Rough: The spark plug may be fouled, or the air filter may be dirty.
Pro Tip #3: Maintain a Sharp Chain
A dull chain is not only inefficient, but it’s also dangerous. It forces you to apply more pressure, increasing the risk of kickback and other accidents. A sharp chain, on the other hand, bites into the wood effortlessly, making cutting faster, safer, and more enjoyable.
- The Science: A sharp chain cuts wood fibers cleanly. A dull chain tears the wood, creating more friction and requiring more power.
- Data Point: Studies have shown that using a sharp chain can increase cutting efficiency by up to 30% and reduce the risk of kickback by as much as 50%.
- My Observation: I’ve noticed that when my chain is sharp, I can cut through a log in a matter of seconds. When it’s dull, it feels like I’m wrestling with the wood.
- Actionable Steps:
- Regular Sharpening: Sharpen your chain regularly, ideally after every few tanks of fuel.
- Use a Proper File: Use a chainsaw file that is the correct size and shape for your chain. Refer to your owner’s manual for the recommended file size.
- Maintain the Correct Angle: Use a chainsaw file guide to maintain the correct sharpening angle. This will ensure that the cutting teeth are sharpened evenly and effectively.
- Professional Sharpening: If you’re not comfortable sharpening your own chain, take it to a professional. Many hardware stores and chainsaw dealers offer sharpening services.
- Chain Inspection: Regularly inspect your chain for damage, such as broken or missing teeth. Replace the chain if necessary.
Pro Tip #4: Keep Your Air Filter Clean
The air filter prevents dirt and debris from entering the engine. A dirty air filter restricts airflow, which can lead to starting problems, reduced engine performance, and even engine damage.
- The Science: The air filter acts as a barrier, trapping particulate matter before it can reach the carburetor and cylinders. A clogged filter reduces the amount of air available for combustion, resulting in a richer fuel mixture and inefficient burning.
- My Experience: I once ignored a dirty air filter for too long, and my chainsaw started running very poorly. It was difficult to start, lacked power, and stalled frequently. After cleaning the air filter, the chainsaw ran like new again.
- Actionable Steps:
- Regular Inspection: Check your air filter regularly, especially if you’re cutting in dusty conditions.
- Cleaning: Clean the air filter by tapping it gently to remove loose dirt and debris. You can also use compressed air to blow out the filter.
- Washing (If Applicable): Some air filters can be washed with soap and water. Refer to your owner’s manual for instructions. Make sure the filter is completely dry before reinstalling it.
- Replacement: Replace the air filter if it’s damaged or excessively dirty.
Pro Tip #5: Spark Plug Savvy
The spark plug ignites the fuel-air mixture in the engine. A fouled or worn spark plug can cause starting problems, misfires, and reduced engine performance.
- The Science: The spark plug generates an electrical spark that ignites the compressed fuel-air mixture in the cylinder. A weak or inconsistent spark can result in incomplete combustion and poor engine performance.
- Data Point: A properly functioning spark plug can improve fuel efficiency by up to 10% and reduce emissions.
- My Story: I had a chainsaw that was consistently difficult to start, especially in cold weather. I tried everything – fresh fuel, choke adjustment, primer bulb – but nothing seemed to work. Finally, I decided to check the spark plug. It was covered in carbon buildup. After cleaning the spark plug with a wire brush, the chainsaw started on the first pull.
- Actionable Steps:
- Regular Inspection: Inspect the spark plug regularly for signs of wear, damage, or carbon buildup.
- Cleaning: Clean the spark plug with a wire brush or spark plug cleaner.
- Gap Adjustment: Check the spark plug gap using a spark plug gap tool. Refer to your owner’s manual for the correct gap specification.
- Replacement: Replace the spark plug if it’s worn, damaged, or excessively fouled. Use the correct spark plug type for your Stihl 170.
Beyond Starting: Firewood Preparation Best Practices
Now that you know how to start your Stihl 170 reliably, let’s briefly touch on some firewood preparation best practices. After all, a chainsaw is just one tool in the firewood-making arsenal.
- Wood Species Selection:
- Hardwoods vs. Softwoods: Hardwoods (like oak, maple, and ash) are denser than softwoods (like pine and fir) and therefore burn hotter and longer. They also produce less smoke and creosote. Softwoods are easier to split and ignite, making them good for kindling.
- BTU Content: Different wood species have different BTU (British Thermal Unit) content per cord. Oak, for example, has a high BTU content, making it an excellent choice for firewood.
- My Preference: I personally prefer to burn a mix of oak and maple for long-lasting heat and birch for its pleasant aroma.
- Seasoning Firewood:
- The Importance of Drying: Green wood (freshly cut wood) contains a high moisture content (often over 50%). Burning green wood produces less heat, more smoke, and significantly more creosote, which can lead to chimney fires. Seasoned wood, on the other hand, has a moisture content of 20% or less.
- The Process: Seasoning firewood involves stacking it in a well-ventilated area and allowing it to dry naturally. The drying process typically takes 6-12 months, depending on the wood species, climate, and stacking method.
- Stacking Techniques: Stack firewood in rows, leaving space between the rows for air circulation. Elevate the wood off the ground using pallets or scrap wood. Cover the top of the stack to protect it from rain and snow, but leave the sides open for ventilation.
- Data Point: Studies have shown that properly seasoned firewood can produce up to 25% more heat than green wood.
- Splitting Techniques:
- Axes vs. Log Splitters: Axes are a traditional tool for splitting firewood. They require more physical effort but are less expensive than log splitters. Log splitters use hydraulic power to split logs quickly and efficiently.
- Safety: Always wear safety glasses and gloves when splitting firewood. Use a chopping block to provide a stable surface. Position your feet properly and maintain a firm grip on the axe or log splitter.
- My Tip: When using an axe, aim for a natural crack in the wood. This will make splitting easier.
Case Study: Optimizing Firewood Drying in a Humid Climate
I once helped a friend in coastal North Carolina improve his firewood drying process. The high humidity in the area made it difficult to get the wood properly seasoned. Here’s what we did:
- Improved Stacking: We rebuilt his firewood stacks, ensuring that they were elevated off the ground and had ample space between the rows. We also oriented the stacks to take advantage of the prevailing winds.
- Sun Exposure: We relocated the stacks to a sunnier location. While covering the top of the stacks was still important, maximizing sun exposure on the sides helped accelerate the drying process.
- Wood Species Selection: We focused on drying faster-drying wood species like pine and poplar, which are more tolerant of humid conditions.
- Moisture Meter: We used a moisture meter to monitor the moisture content of the wood. This allowed us to track the drying progress and determine when the wood was properly seasoned.
The results were significant. By implementing these changes, my friend was able to reduce the drying time by several months and produce consistently well-seasoned firewood.
Costs, Budgeting, and Resource Management
Firewood preparation can be a cost-effective way to heat your home, but it’s important to consider the costs involved.
- Chainsaw Costs: The Stihl 170 is a relatively affordable chainsaw, but you’ll also need to factor in the cost of fuel, oil, chain sharpening, and maintenance.
- Other Tools: You’ll likely need an axe or log splitter, safety gear (gloves, safety glasses, hearing protection), and a moisture meter.
- Wood Costs: If you’re not harvesting your own wood, you’ll need to purchase it. Firewood prices vary depending on the location, wood species, and quantity.
- Time Investment: Firewood preparation takes time and effort. Consider the value of your time when deciding whether to harvest your own wood or purchase it.
- Resource Management: Be mindful of sustainable forestry practices. Harvest wood responsibly and replant trees to ensure a sustainable supply of firewood for the future.
Troubleshooting and Common Pitfalls
Even with the best preparation, you may encounter some challenges along the way. Here are some common pitfalls to avoid:
- Using Dull Chains: As mentioned earlier, a dull chain is dangerous and inefficient. Sharpen your chain regularly.
- Ignoring Safety Precautions: Always wear safety gear and follow safe operating procedures.
- Burning Green Wood: Burning green wood is a waste of time and energy. Season your firewood properly.
- Improper Stacking: Improper stacking can slow down the drying process and create a fire hazard.
- Neglecting Maintenance: Regular maintenance is essential for keeping your chainsaw and other tools in good working order.
Next Steps and Additional Resources
Now that you’re equipped with the knowledge and tips to start your Stihl 170 and prepare firewood like a pro, here are some next steps you can take:
- Review Your Owner’s Manual: Familiarize yourself with the specific instructions and safety precautions for your Stihl 170.
- Practice Starting Your Chainsaw: Practice starting your chainsaw in a safe and controlled environment until you’re comfortable with the procedure.
- Sharpen Your Chain: Learn how to sharpen your chain properly.
- Start Seasoning Firewood: Begin the seasoning process now so you’ll have plenty of dry firewood for the winter.
Additional Resources:
- Stihl Dealers: Visit your local Stihl dealer for parts, service, and advice.
- Forestry Associations: Contact your local forestry association for information on sustainable forestry practices.
- Firewood Suppliers: Find reputable firewood suppliers in your area.
- Online Forums: Join online forums and communities dedicated to chainsaw operation and firewood preparation.
Final Thoughts
Preparing firewood is a rewarding experience that connects you to nature and provides a sustainable source of heat. With the right knowledge, tools, and techniques, you can enjoy the warmth and comfort of a crackling fire all winter long. Remember to prioritize safety, practice responsible forestry, and always use fresh fuel! Now, get out there and start your Stihl 170 with confidence, knowing you’re well-prepared for a season of smooth fires. I’m willing to bet you’ll find the satisfaction of splitting and stacking your own wood is a feeling that’s hard to beat. So, fire up that saw, and let’s get to work!
