# David Bradley 917 Chainsaw Guide: 5 Pro Tips for Optimal Use (A Blast from the Past!)
**(A Personal Story: Echoes of Dad and the Mighty DB917)**
I can still smell the mix of gasoline and two-stroke oil, a scent so inextricably linked to my childhood that it instantly transports me back to weekends spent helping (or, more accurately, *trying* to help) my dad clear fallen trees around our property. The star of the show, the workhorse that roared to life with a vengeance, was his David Bradley 917 chainsaw. That thing was a beast. Heavy, loud, and unapologetically old-school, the DB917 wasn't for the faint of heart. I remember watching my dad, a man who could seemingly fix anything, wrestling with it sometimes, coaxing it to start after a long winter, or meticulously sharpening the chain by hand. He treated it with a respect bordering on reverence. He knew its quirks, its strengths, and its potential for both incredible productivity and serious danger. While modern chainsaws are lighter, more efficient, and often packed with safety features, the David Bradley 917 holds a special place in many hearts (and garages). It’s a testament to durable engineering, and with proper care, it can still be a valuable tool. If you're lucky enough to own one of these vintage powerhouses, this guide is for you. Let's dive into some pro tips to keep your DB917 roaring for years to come. ## Understanding the David Bradley 917: A Brief Overview
The David Bradley 917 chainsaw, produced in the mid-20th century, is a robust, direct-drive machine known for its powerful engine and simple, yet sturdy design. It’s a far cry from today’s lightweight, ergonomic models, but its reliability and ability to tackle tough jobs are legendary. Key features include:
* **Direct Drive:** No clutch! This means the chain spins as soon as the engine is running. Be extra cautious! * **Heavy Construction:** These saws are built like tanks. Expect some weight to them. * **Simple Carburetor:** Relatively easy to maintain and rebuild (once you understand it). * **Limited Safety Features:** This is a big one. Modern safety features are mostly absent. Safety gear is *essential*. ## 5 Pro Tips for Optimal David Bradley 917 Chainsaw Use
Here are five crucial tips to ensure your DB917 operates safely and efficiently:
**1. Mastering the Fuel Mixture: The Lifeblood of Your DB917**
This is the most critical aspect of owning a two-stroke engine like the DB917. The correct fuel-to-oil ratio is vital for lubrication and preventing engine damage. * **The Ratio:** The general consensus for the DB917 is a **16:1** fuel-to-oil ratio. This means 16 parts gasoline to 1 part two-stroke oil. **Double-check your manual or consult an expert to verify the correct ratio for your specific model.** Using an incorrect ratio can lead to serious engine damage. * **The Oil:** Use high-quality two-stroke oil specifically designed for air-cooled engines. Avoid using automotive oil. * **Mixing:** Always mix the fuel and oil thoroughly in a separate, clean container *before* pouring it into the chainsaw's fuel tank. Don't mix directly in the tank. * **Fresh Fuel:** Use fresh gasoline. Old fuel can degrade and cause starting problems and poor engine performance. If the saw has been sitting for a long time, drain the old fuel and replace it with fresh fuel. **2. Sharpening the Chain: A Sharp Chain is a Safe Chain**
A dull chain is not only inefficient, but it's also dangerous. It requires more force to cut, increasing the risk of kickback and loss of control. * **Regular Sharpening:** Sharpen the chain frequently. Ideally, sharpen it after every few hours of use, or whenever you notice it struggling to cut cleanly. * **Filing Technique:** Use a round file of the correct size for your chain. Maintain the correct angle and depth while filing each tooth. There are plenty of online resources and videos demonstrating proper chainsaw chain sharpening techniques. Practice makes perfect! * **Depth Gauges:** Don't forget to check and file the depth gauges (also called rakers) if necessary. These control how much wood each tooth bites into. If they are too high, the chain won't cut effectively. * **Professional Sharpening:** If you're not comfortable sharpening the chain yourself, take it to a professional. **3. Carburetor Tuning: Getting the Air/Fuel Mix Just Right**
The carburetor controls the air/fuel mixture that enters the engine. Proper tuning is essential for smooth running and optimal performance. * **Understanding the Adjustments:** Most DB917 carburetors have two or three adjustment screws: a high-speed (H) screw, a low-speed (L) screw, and sometimes an idle speed (T) screw. * **Starting Point:** Before making any adjustments, note the current position of the screws. This way, you can always return to the original settings if needed. * **Tuning Procedure:** Start by adjusting the low-speed screw for a smooth idle. Then, adjust the high-speed screw for maximum power without bogging down. The idle speed screw controls the engine speed when the throttle is released. * **Listen to the Engine:** The engine's sound is your best guide. A lean mixture (too much air) will cause the engine to run hot and potentially damage it. A rich mixture (too much fuel) will cause it to smoke and run poorly. * **Professional Help:** If you're unsure about carburetor tuning, it's best to consult a small engine mechanic. **4. Lubrication is Key: Chain and Bar Oil is Essential**
Proper lubrication of the chain and bar is crucial for reducing friction, preventing wear, and ensuring smooth cutting. * **Chain and Bar Oil:** Use a high-quality chain and bar oil specifically designed for chainsaws. Do not use motor oil or other substitutes. * **Oil Level:** Keep the chain and bar oil reservoir filled. Check the level frequently, especially during prolonged use. * **Oil Flow:** Make sure the oiler is working correctly. You should see a steady stream of oil coming from the oiler hole when the engine is running. If not, check for blockages or a faulty oil pump. * **Cleanliness:** Keep the chain and bar clean and free of debris. **5. Safety First: Respect the Power of the DB917**
The David Bradley 917 is a powerful tool, and it demands respect. Safety should always be your top priority. * **Personal Protective Equipment (PPE):** Always wear appropriate PPE, including:
* **Eye Protection:** Safety glasses or a face shield. * **Hearing Protection:** Earplugs or earmuffs. * **Gloves:** Heavy-duty work gloves. * **Leg Protection:** Chainsaw chaps or protective pants. * **Foot Protection:** Steel-toed boots. * **Kickback Awareness:** Understand the causes of kickback and how to avoid it. Keep a firm grip on the saw with both hands. * **Safe Cutting Techniques:** Use proper cutting techniques to avoid pinching the bar and causing kickback. * **Clear the Area:** Before starting the saw, clear the area of obstacles and bystanders. * **Know Your Limits:** Don't attempt to cut trees that are too large or difficult for you to handle. * **Maintenance:** Keep the saw in good working condition. Regularly inspect it for loose parts, leaks, and other problems. * **First Aid:** Keep a well-stocked first aid kit readily available. ## Conclusion: Keeping the Legacy Alive
The David Bradley 917 chainsaw is a piece of history, a reminder of a time when tools were built to last. By following these pro tips and prioritizing safety, you can keep your DB917 running strong and continue to appreciate the power and reliability of this classic machine. And who knows, maybe one day you'll be sharing your own stories of taming the mighty DB917 with the next generation. Now, go fire it up (safely, of course!) and get to work.
