How To Start A Stihl BR 600 (Troubleshoot Fuel & Engine Startup)

Let’s talk about staying dry while working with wood, shall we? When I’m out in the field, whether it’s bucking logs after a downburst or splitting wood in a drizzle, I always consider my gear’s water resistance. A good waterproof jacket and pants are essential, of course, but don’t forget about gloves. Wet gloves are the bane of any woodworker’s existence! I’ve found that layering gloves – a thin waterproof liner underneath a heavier work glove – works wonders. And for my Stihl BR 600 backpack blower? I keep a small tarp handy to cover it when the skies open up unexpectedly. Now, let’s get to the heart of the matter: troubleshooting that BR 600.

How to Start a Stihl BR 600 (Troubleshoot Fuel & Engine Startup)

The Stihl BR 600 is a workhorse, a true champion in the world of backpack blowers. Its powerful engine and efficient design make it a favorite among landscapers, groundskeepers, and even homeowners tackling large properties. But even the best machines can sometimes refuse to cooperate. If you’re struggling to get your BR 600 started, don’t despair! I’ve been there, and I’m here to guide you through the troubleshooting process. We’ll delve into the common culprits behind engine startup issues and provide you with a step-by-step approach to get your blower roaring again.

Before we dive in, let’s acknowledge the scale of the challenge. The global landscaping services market, which relies heavily on equipment like the BR 600, is estimated to reach over \$115 billion by 2027. That’s a lot of blowers running! And with that many machines in operation, startup problems are inevitable.

Understanding the Basics: Fuel, Spark, and Compression

Before you start tearing things apart, it’s crucial to understand the fundamental principles of internal combustion engines. They need three things to run:

Fuel: A proper mixture of gasoline and oil.
Spark: A spark to ignite the fuel-air mixture.
Compression: Adequate pressure within the cylinder.

If any of these elements are missing or insufficient, the engine won’t start. Think of it like a three-legged stool – if one leg is broken, the whole thing collapses. We’ll address each of these areas systematically.

Preliminary Checks: The Easy Wins

Before getting into the more complex diagnostics, let’s cover the quick and simple checks that often resolve the issue:

Fuel Tank: Is there fuel in the tank? Sounds obvious, but it’s easily overlooked. I once spent a frustrated hour troubleshooting a chainsaw only to realize the tank was bone dry. Now, it’s the first thing I check.
Fuel Cap Vent: Make sure the fuel cap vent is not clogged. A clogged vent can create a vacuum in the tank, preventing fuel from flowing. Try loosening the fuel cap slightly and then attempt to start the blower. If it starts, the vent is likely the culprit.
On/Off Switch: Ensure the on/off switch is in the “ON” or “RUN” position. I know, it sounds ridiculous, but it happens!
Throttle Lock: Make sure the throttle lock is disengaged. Sometimes the throttle lock can prevent the engine from starting, especially if it’s slightly out of adjustment.
Choke Position: Understand your choke settings. The BR 600 typically has a choke lever with three positions:
- Full Choke: Used for cold starts.
- Half Choke: Used after the engine has initially fired but won’t stay running.
- Run: Used once the engine is warmed up.
Check the Air Filter: A clogged air filter restricts airflow, making it difficult for the engine to start. Remove the air filter cover and inspect the filter. If it’s dirty, clean it with warm, soapy water, allow it to dry completely, and then re-oil it lightly with air filter oil. A dirty air filter can reduce engine power by up to 20%, according to some studies.

If you’ve checked these basics and the blower still won’t start, it’s time to delve deeper.

Troubleshooting Fuel Delivery Problems

Fuel delivery issues are a common cause of starting problems. Let’s investigate the fuel system step-by-step:

Check the Fuel Lines: Inspect the fuel lines for cracks, kinks, or leaks. Over time, fuel lines can become brittle and deteriorate, especially with ethanol-blended fuels. Replace any damaged fuel lines.
- How to Inspect Fuel Lines:
  - Visually examine the fuel lines for any signs of damage.
  - Gently squeeze the fuel lines to check for brittleness. If they feel hard and inflexible, they likely need to be replaced.
  - Look for fuel leaks around the fuel line connections.
- Check the Fuel Filter: The fuel filter prevents debris from entering the carburetor. A clogged fuel filter restricts fuel flow.
- How to Check and Replace the Fuel Filter:
  - Locate the fuel filter inside the fuel tank. It’s usually attached to the end of one of the fuel lines.
  - Use a small hook or wire to carefully pull the fuel filter out of the tank.
  - Inspect the filter for dirt and debris.
  - If the filter is clogged, replace it with a new one. Ensure you use the correct type of fuel filter for the BR 600.
- Primer Bulb Inspection: The primer bulb helps draw fuel from the tank to the carburetor.
- How to Check the Primer Bulb:
  - Press the primer bulb several times. You should see fuel flowing through the clear fuel line.
  - If the primer bulb is cracked or damaged, replace it.
  - If the primer bulb doesn’t seem to be drawing fuel, there may be a blockage in the fuel lines or the fuel filter.
- Carburetor Issues: The carburetor is responsible for mixing fuel and air in the correct proportions. A dirty or clogged carburetor is a frequent culprit behind starting problems.
- Symptoms of a Dirty Carburetor:
  - Engine won’t start.
  - Engine starts but stalls quickly.
  - Engine runs roughly or unevenly.
  - Poor engine performance.
- Carburetor Cleaning (Step-by-Step):
  - Safety First: Disconnect the spark plug wire before working on the carburetor. This prevents accidental starting.
  - Remove the Air Filter and Air Filter Housing: This will expose the carburetor.
  - Disconnect the Fuel Lines: Carefully disconnect the fuel lines from the carburetor. Be prepared for some fuel spillage.
  - Remove the Carburetor: Unscrew the bolts or screws that hold the carburetor in place.
  - Disassemble the Carburetor: Carefully disassemble the carburetor, taking note of the location of each part. It’s helpful to take pictures as you go.
  - Clean the Carburetor: Use carburetor cleaner to thoroughly clean all the carburetor parts, including the jets, passages, and needle valves. Compressed air can be used to blow out any remaining debris. Pay special attention to the small jets, as these are easily clogged.
  - Reassemble the Carburetor: Reassemble the carburetor in the reverse order of disassembly. Make sure all the parts are properly seated.
  - Reinstall the Carburetor: Reinstall the carburetor onto the engine.
  - Reconnect the Fuel Lines: Reconnect the fuel lines to the carburetor.
  - Reinstall the Air Filter Housing and Air Filter: Reinstall the air filter housing and air filter.
  - Reconnect the Spark Plug Wire: Reconnect the spark plug wire.
- Carburetor Adjustment:
  - After cleaning the carburetor, you may need to adjust the idle speed and the high-speed mixture. Refer to your BR 600’s owner’s manual for the proper adjustment procedures. Typically, there are two adjustment screws: one for idle speed (marked “LA” or “T”) and one for the high-speed mixture (marked “H”).
  - Idle Speed Adjustment: Turn the idle speed screw until the engine idles smoothly without stalling.
  - High-Speed Mixture Adjustment: Turn the high-speed mixture screw until the engine runs smoothly at full throttle. Be careful not to lean out the mixture too much, as this can damage the engine.
- When to Replace the Carburetor:
  - If the carburetor is severely damaged or corroded.
  - If you’ve cleaned the carburetor multiple times and it still doesn’t function properly.
  - If the carburetor is beyond repair.

Troubleshooting Spark Issues

If fuel delivery seems to be in order, the next step is to check for spark. Without a spark, the fuel-air mixture won’t ignite.

Check the Spark Plug: The spark plug provides the spark that ignites the fuel-air mixture.
- How to Check the Spark Plug:
  - Remove the spark plug from the engine.
  - Inspect the spark plug for signs of damage, such as cracks, chips, or excessive carbon buildup.
  - Clean the spark plug with a wire brush or spark plug cleaner.
  - Check the spark plug gap. The correct gap for the BR 600 is typically around 0.020 inches (0.5 mm). Use a spark plug gap tool to adjust the gap if necessary.
  - Test the spark plug. Connect the spark plug wire to the spark plug and hold the spark plug against the engine block. Pull the starter rope. You should see a strong, blue spark jump across the spark plug gap.
  - If the spark plug is fouled or damaged, replace it with a new one. Use the correct type of spark plug for the BR 600. NGK CMR6H is a common replacement.
- Check the Spark Plug Wire and Boot: Inspect the spark plug wire and boot for damage. A damaged wire or boot can prevent the spark from reaching the spark plug.
- How to Check the Spark Plug Wire and Boot:
  - Visually inspect the spark plug wire and boot for cracks, cuts, or other damage.
  - Make sure the spark plug wire is securely connected to the spark plug and the ignition coil.
  - If the spark plug wire or boot is damaged, replace it.
- Check the Ignition Coil: The ignition coil generates the high voltage required to create a spark.
- How to Check the Ignition Coil (Requires a Multimeter):
  - Disconnect the spark plug wire from the spark plug.
  - Set your multimeter to the ohms setting.
  - Touch one probe of the multimeter to the spark plug wire connection on the ignition coil and the other probe to the engine block.
  - You should get a reading within the manufacturer’s specifications. Refer to your BR 600’s service manual for the correct resistance values.
  - If the ignition coil is faulty, replace it.
- Flywheel Key: The flywheel key aligns the flywheel with the crankshaft. A sheared flywheel key can disrupt the timing and prevent the engine from starting.
- How to Check the Flywheel Key:
  - Remove the spark plug.
  - Remove the starter assembly.
  - Remove the flywheel nut.
  - Use a flywheel puller to remove the flywheel.
  - Inspect the flywheel key for damage.
  - If the flywheel key is sheared, replace it.

Troubleshooting Compression Issues

Compression is the third essential element for engine startup. Low compression can prevent the engine from starting or cause it to run poorly.

Check the Cylinder: Inspect the cylinder for damage. Scratches, scoring, or cracks in the cylinder wall can cause compression loss.
- How to Check the Cylinder:
  - Remove the spark plug.
  - Inspect the cylinder through the spark plug hole. Use a flashlight to get a better view.
  - Look for any signs of damage to the cylinder wall.
  - If the cylinder is damaged, the engine may need to be rebuilt or replaced.
- Check the Piston Rings: The piston rings seal the gap between the piston and the cylinder wall. Worn or damaged piston rings can cause compression loss.
- How to Check the Piston Rings (Requires a Compression Tester):
  - Remove the spark plug.
  - Screw a compression tester into the spark plug hole.
  - Pull the starter rope several times.
  - Read the compression reading on the compression tester.
  - Compare the reading to the manufacturer’s specifications.
  - If the compression is low, the piston rings may be worn or damaged.
- Check the Valves: The valves control the flow of air and exhaust into and out of the cylinder. Leaking or damaged valves can cause compression loss.
- How to Check the Valves (Leak-Down Test):
  - This test requires specialized equipment and knowledge. It’s best to take the engine to a qualified mechanic for a leak-down test.
  - The leak-down test involves pressurizing the cylinder with compressed air and listening for leaks around the valves, piston rings, and head gasket.
  - If the valves are leaking, they may need to be lapped or replaced.

Additional Tips and Considerations

Fuel Quality: Use fresh, high-quality fuel with the correct oil mixture (typically 50:1). Avoid using old or stale fuel, as it can gum up the carburetor. Ethanol-blended fuels can also cause problems in small engines, so consider using ethanol-free fuel if possible. I’ve seen fuel lines completely dissolve from ethanol, it’s a real problem.
Storage: When storing the BR 600 for extended periods, drain the fuel tank and run the engine until it stalls to prevent fuel from gumming up the carburetor. You can also add a fuel stabilizer to the fuel to help prevent it from deteriorating.
Maintenance: Regular maintenance is key to preventing starting problems. Follow the manufacturer’s recommended maintenance schedule, including changing the air filter, spark plug, and fuel filter.
Professional Help: If you’ve tried all the troubleshooting steps and your BR 600 still won’t start, it’s time to take it to a qualified mechanic. They have the tools and expertise to diagnose and repair more complex problems.

Case Study: Reviving a Neglected BR 600

I once encountered a BR 600 that had been sitting unused in a shed for over two years. The owner had given up on it, assuming it was beyond repair. I decided to take on the challenge.

Initial Assessment: The blower was covered in dust and grime. The fuel tank was empty, and the fuel lines were cracked and brittle. The air filter was completely clogged.
Step-by-Step Revival:
1. Replaced the Fuel Lines: I replaced all the fuel lines with new ones.
2. Replaced the Fuel Filter: The old fuel filter was completely clogged, so I replaced it with a new one.
3. Cleaned the Carburetor: The carburetor was heavily gummed up, so I disassembled it and cleaned it thoroughly with carburetor cleaner.
4. Replaced the Spark Plug: The old spark plug was fouled, so I replaced it with a new one.
5. Cleaned the Air Filter: I cleaned the air filter with warm, soapy water, allowed it to dry completely, and then re-oiled it lightly with air filter oil.
6. Fresh Fuel: I filled the fuel tank with fresh, high-quality fuel.
The Result: After a few pulls on the starter rope, the BR 600 roared to life. It ran smoothly and powerfully. The owner was amazed that I had been able to revive it.

This case study highlights the importance of thorough troubleshooting and attention to detail. Even a neglected BR 600 can often be brought back to life with some basic maintenance and repair.

Costs and Budgeting

Troubleshooting and repairing a BR 600 can involve some expenses. Here’s a breakdown of potential costs:

Parts:
- Fuel filter: \$5 – \$10
- Fuel lines: \$10 – \$20
- Spark plug: \$5 – \$10
- Air filter: \$10 – \$20
- Carburetor cleaner: \$5 – \$10
- Carburetor rebuild kit: \$20 – \$40
- New carburetor: \$50 – \$150
- Ignition coil: \$30 – \$60
Tools:
- Spark plug wrench: \$5 – \$10
- Screwdrivers: \$10 – \$20
- Pliers: \$10 – \$20
- Multimeter: \$20 – \$50
- Compression tester: \$30 – \$60
- Flywheel puller: \$20 – \$40
Labor (if you take it to a mechanic): \$50 – \$100 per hour

It’s important to factor in these costs when deciding whether to repair the BR 600 yourself or take it to a professional. If you’re comfortable working on small engines and have the necessary tools, you can save a significant amount of money by doing the repairs yourself.

Common Pitfalls to Avoid

Using the Wrong Fuel Mixture: Always use the correct fuel-to-oil ratio specified by the manufacturer (typically 50:1). Using the wrong mixture can damage the engine.
Over-Tightening Spark Plug: Over-tightening the spark plug can damage the cylinder head. Tighten the spark plug to the manufacturer’s specified torque.
Forcing Parts: If a part doesn’t seem to fit, don’t force it. Double-check the part number and make sure you’re installing it correctly.
Ignoring Safety Precautions: Always disconnect the spark plug wire before working on the engine to prevent accidental starting. Wear safety glasses and gloves to protect yourself from fuel and other chemicals.
Neglecting Maintenance: Regular maintenance is key to preventing problems. Don’t neglect the recommended maintenance schedule.

Next Steps and Additional Resources

Once you’ve successfully started your Stihl BR 600, it’s important to keep it running smoothly. Here are some next steps:

Regular Maintenance: Continue to follow the manufacturer’s recommended maintenance schedule.
Proper Storage: Store the blower properly when not in use.
Inspect Regularly: Regularly inspect the blower for any signs of damage or wear.
Keep it Clean: Keep the blower clean to prevent dirt and debris from causing problems.

Here are some additional resources that you may find helpful:

Stihl Website: The Stihl website (https://www.stihl.com/) provides information about the BR 600, including the owner’s manual, parts diagrams, and troubleshooting tips.
Stihl Dealers: Your local Stihl dealer can provide you with parts, service, and advice.
Online Forums: There are many online forums dedicated to Stihl equipment. These forums can be a great source of information and support.
YouTube: YouTube is a great resource for finding videos on how to troubleshoot and repair Stihl equipment.

The Future of Wood Processing and the Importance of Reliable Equipment

The firewood and wood processing industry is undergoing significant changes. With increasing awareness of sustainable forestry practices and the growing demand for renewable energy sources, the industry is evolving. According to recent data, the global firewood market is projected to reach \$3.5 billion by 2028, driven by factors such as rising energy costs and environmental concerns.

In this evolving landscape, reliable equipment like the Stihl BR 600 plays a crucial role. Whether you’re a professional landscaper, a firewood producer, or a homeowner, having equipment that you can depend on is essential for success. By understanding how to troubleshoot and maintain your equipment, you can minimize downtime and maximize productivity.

Final Thoughts: A Passion for Wood and the Tools That Help Us

For me, working with wood is more than just a job or a hobby – it’s a passion. There’s something deeply satisfying about taking a raw piece of timber and transforming it into something useful or beautiful. And the tools that we use, like the Stihl BR 600, are an integral part of that process. They’re extensions of our hands, allowing us to shape and manipulate wood in ways that would otherwise be impossible.

So, the next time you’re struggling to start your BR 600, remember this guide. Take your time, follow the steps, and don’t be afraid to get your hands dirty. With a little patience and perseverance, you’ll have your blower roaring again in no time. And who knows, you might even learn something new along the way. Now get out there and make some sawdust!

How to Start a Stihl BR 600 (Troubleshoot Fuel & Engine Startup)

How to Start a Stihl BR 600 (Troubleshoot Fuel & Engine Startup)