Start 136 Chainsaw Troubleshooting (5 Pro Fixes You Must Know)
It’s a paradox, isn’t it? We wield these powerful, roaring machines, these chainsaws, capable of felling giants of the forest, yet they can be brought to their knees by something as simple as a dirty air filter or a spark plug gone bad. The Husqvarna 136, a chainsaw I’ve known intimately for years, is no exception. It’s a reliable workhorse, but like any machine, it has its quirks and common ailments. The user intent behind “Start 136 Chainsaw Troubleshooting (5 Pro Fixes You Must Know)” is clear: to diagnose and resolve common issues with the Husqvarna 136 chainsaw and get it back to cutting wood safely and efficiently.
This guide is my attempt to share the knowledge I’ve accumulated through years of felling trees, bucking logs, and troubleshooting chainsaws in the field. I’m not just going to tell you what to do, I’m going to explain why you’re doing it. I’ll share stories, insights, and practical tips that will help you understand your Husqvarna 136 better and keep it running smoothly for years to come.
Understanding Your Husqvarna 136 Chainsaw
Before diving into troubleshooting, let’s establish a baseline understanding of the key components of your Husqvarna 136 chainsaw and how they function. This will make the troubleshooting process much easier.
- Engine: The heart of the chainsaw. It’s a two-stroke engine that requires a mixture of gasoline and oil for lubrication.
- Carburetor: Mixes air and fuel in the correct proportions for combustion. It’s responsible for controlling the engine’s speed and power.
- Ignition System: Creates the spark that ignites the fuel-air mixture in the cylinder. This includes the spark plug and ignition coil.
- Fuel System: Delivers fuel from the fuel tank to the carburetor. This includes the fuel filter, fuel lines, and fuel pump (if equipped).
- Air Filter: Prevents dirt and debris from entering the engine. A clean air filter is crucial for optimal performance.
- Chain and Bar: The cutting components of the chainsaw. The chain is driven around the bar by the engine.
- Clutch: Connects the engine to the chain. It allows the engine to idle without the chain spinning.
- Oil Pump: Lubricates the chain and bar to reduce friction and wear.
- Recoil Starter: Used to start the engine.
Key Terms and Concepts
- Two-Stroke Engine: An engine that completes a power cycle with two strokes of the piston. It requires oil to be mixed with the fuel for lubrication.
- Air-Fuel Mixture: The ratio of air to fuel in the engine. This ratio needs to be precisely controlled for optimal combustion.
- Carburetor Adjustment: Adjusting the carburetor screws (high, low, and idle) to fine-tune the air-fuel mixture.
- Chain Tension: The tightness of the chain on the bar. Proper chain tension is essential for safe and efficient cutting.
- Bar Oil: Special oil designed to lubricate the chain and bar.
- Green Wood: Freshly cut wood that has a high moisture content.
- Seasoned Wood: Wood that has been dried to a lower moisture content, making it easier to burn. The target moisture content for firewood is typically below 20%. I’ve found that splitting wood before seasoning dramatically reduces drying time, and also makes it easier to handle.
- Bucking: Cutting a felled tree into smaller, manageable logs.
- Felling: The act of cutting down a tree.
- Kickback: A dangerous situation where the chainsaw suddenly kicks back towards the operator.
5 Pro Fixes for Your Husqvarna 136 Chainsaw
Now, let’s get to the heart of the matter: troubleshooting and fixing common problems with your Husqvarna 136. I’ve selected five fixes that I’ve found to be the most frequently needed and effective in getting these saws back up and running.
1. The Stalling Savior: Cleaning or Replacing the Air Filter
Problem: Your chainsaw starts but stalls shortly after, or it runs sluggishly and lacks power.
Why This Happens: A dirty air filter restricts airflow to the engine, disrupting the air-fuel mixture. This leads to incomplete combustion, causing the engine to stall or run poorly.
My Experience: I remember one particularly dusty logging job in the Pacific Northwest. My Husqvarna 136 was bogging down constantly. I initially suspected a carburetor issue, but after a quick check of the air filter, I found it completely clogged with sawdust. Cleaning it on the spot got me back to work in minutes.
Step-by-Step Guide:
- Safety First: Always turn off the chainsaw and let it cool down completely before performing any maintenance. Disconnect the spark plug wire to prevent accidental starting.
- Locate the Air Filter: The air filter is typically located under a cover on the top or side of the chainsaw. On the Husqvarna 136, it’s usually accessible by removing a single screw or clip.
- Remove the Air Filter: Carefully remove the air filter from its housing.
- Inspect the Air Filter: Examine the air filter for dirt, debris, and damage. If it’s heavily soiled or damaged, it’s best to replace it.
- Clean the Air Filter (If Reusable):
- Option 1 (Compressed Air): Use compressed air to blow out the dirt and debris from the inside out. Wear safety glasses to protect your eyes.
- Option 2 (Warm Water and Soap): Wash the air filter in warm water with a mild detergent. Rinse thoroughly and allow it to dry completely before reinstalling. Note: Some air filters are made of paper and cannot be washed. Check your owner’s manual for specific cleaning instructions.
- Clean the Air Filter Housing: Wipe out the air filter housing with a clean cloth to remove any dirt or debris.
- Reinstall the Air Filter: Carefully reinstall the air filter into its housing, ensuring that it is properly seated.
- Reattach the Cover: Reattach the air filter cover and secure it with the screw or clip.
- Reconnect the Spark Plug Wire: Reconnect the spark plug wire.
- Test the Chainsaw: Start the chainsaw and see if the problem is resolved.
Tools Needed:
- Screwdriver (if required to remove the air filter cover)
- Compressed air (optional)
- Warm water and mild detergent (optional)
- Clean cloth
- Safety glasses
Measurements and Specs:
- Air filter replacement frequency: Typically every 25-50 hours of use, or more often in dusty conditions.
- Air filter material: Typically foam or paper.
- Cost of a new air filter: $5-$15.
Strategic Advantage: Regularly cleaning or replacing the air filter will improve your chainsaw’s performance, fuel efficiency, and lifespan. It’s a simple task that can save you a lot of headaches in the long run.
2. The Spark Igniter: Checking and Replacing the Spark Plug
Problem: Your chainsaw won’t start at all, or it’s very difficult to start.
Why This Happens: The spark plug is responsible for igniting the fuel-air mixture in the cylinder. If the spark plug is fouled, worn, or damaged, it may not produce a spark, preventing the engine from starting.
My Experience: I once spent an entire afternoon trying to start a Husqvarna 136 that refused to cooperate. I checked everything – fuel, air filter, compression – but nothing seemed to work. Finally, out of desperation, I pulled the spark plug. It was completely coated in carbon. A quick cleaning with a wire brush and a gap adjustment got it running like new.
Step-by-Step Guide:
- Safety First: Always turn off the chainsaw and let it cool down completely before performing any maintenance. Disconnect the spark plug wire.
- Locate the Spark Plug: The spark plug is typically located on the side of the engine, under a small cover.
- Remove the Spark Plug Cover: Remove the spark plug cover.
- Disconnect the Spark Plug Wire: Carefully disconnect the spark plug wire from the spark plug.
- Remove the Spark Plug: Use a spark plug wrench to remove the spark plug from the cylinder head.
- Inspect the Spark Plug: Examine the spark plug for signs of fouling, wear, or damage.
- Fouled Spark Plug: Coated in carbon or oil. This can be caused by a rich air-fuel mixture, excessive oil in the fuel, or a worn engine.
- Worn Spark Plug: Rounded electrodes. This indicates that the spark plug has reached the end of its lifespan.
- Damaged Spark Plug: Cracked or broken insulator. This can be caused by overheating or physical damage.
- Clean the Spark Plug (If Fouled): Use a wire brush to clean the carbon or oil from the spark plug electrodes.
- Adjust the Spark Plug Gap: Use a spark plug gap tool to adjust the gap between the electrodes to the manufacturer’s specification. The correct gap for the Husqvarna 136 is typically 0.5mm (0.020 inches).
- Replace the Spark Plug (If Worn or Damaged): If the spark plug is worn or damaged, replace it with a new spark plug of the correct type. The recommended spark plug for the Husqvarna 136 is typically a Champion RCJ7Y or equivalent.
- Reinstall the Spark Plug: Carefully reinstall the spark plug into the cylinder head and tighten it to the manufacturer’s specification. Typically, this is around 15-20 Nm (11-15 ft-lbs).
- Reconnect the Spark Plug Wire: Reconnect the spark plug wire to the spark plug.
- Reattach the Spark Plug Cover: Reattach the spark plug cover.
- Test the Chainsaw: Start the chainsaw and see if the problem is resolved.
Tools Needed:
- Spark plug wrench
- Spark plug gap tool
- Wire brush
- New spark plug (if needed)
Measurements and Specs:
- Spark plug gap: 0.5mm (0.020 inches)
- Spark plug tightening torque: 15-20 Nm (11-15 ft-lbs)
- Spark plug replacement frequency: Typically every 100 hours of use, or more often if the chainsaw is used frequently.
- Cost of a new spark plug: $5-$10.
Strategic Advantage: A properly functioning spark plug is essential for reliable starting and optimal engine performance. Regularly checking and replacing the spark plug will prevent starting problems and ensure that your chainsaw runs smoothly.
3. The Fuel Flow Fix: Cleaning or Replacing the Fuel Filter
Problem: Your chainsaw starts but dies shortly after, or it runs erratically and lacks power, especially under load.
Why This Happens: A clogged fuel filter restricts the flow of fuel to the carburetor, causing the engine to starve for fuel. This can lead to stalling, poor performance, and even engine damage.
My Experience: I was helping a friend clear some brush on his property when his Husqvarna 136 started acting up. It would start fine, but then die as soon as you tried to cut anything. We were about to call it a day when I remembered the fuel filter. Sure enough, it was completely clogged with sediment. A quick replacement got him back in business.
Step-by-Step Guide:
- Safety First: Always turn off the chainsaw and let it cool down completely before performing any maintenance.
- Locate the Fuel Filter: The fuel filter is located inside the fuel tank, attached to the end of the fuel line.
- Access the Fuel Tank: Remove the fuel cap from the fuel tank.
- Retrieve the Fuel Filter: Use a piece of wire or a bent coat hanger to carefully fish the fuel filter out of the fuel tank.
- Inspect the Fuel Filter: Examine the fuel filter for dirt, debris, and damage. If it’s heavily soiled or damaged, it’s best to replace it.
- Clean the Fuel Filter (If Reusable):
- Option 1 (Carburetor Cleaner): Spray the fuel filter with carburetor cleaner to dissolve any dirt or debris.
- Option 2 (Compressed Air): Use compressed air to blow out the dirt and debris from the inside out.
- Replace the Fuel Filter (If Needed): If the fuel filter is damaged or heavily soiled, replace it with a new fuel filter of the correct type.
- Reinstall the Fuel Filter: Carefully reattach the fuel filter to the end of the fuel line.
- Return the Fuel Filter to the Tank: Carefully lower the fuel filter back into the fuel tank.
- Replace the Fuel Cap: Reattach the fuel cap.
- Test the Chainsaw: Start the chainsaw and see if the problem is resolved.
Tools Needed:
- Piece of wire or bent coat hanger
- Carburetor cleaner (optional)
- Compressed air (optional)
- New fuel filter (if needed)
Measurements and Specs:
- Fuel filter replacement frequency: Typically every 100 hours of use, or more often if the fuel is contaminated.
- Fuel filter material: Typically felt or plastic mesh.
- Cost of a new fuel filter: $3-$8.
Strategic Advantage: Maintaining a clean fuel filter ensures a consistent fuel supply to the carburetor, which is crucial for optimal engine performance and preventing engine damage.
4. The Carburetor Conundrum: Adjusting the Carburetor
Problem: Your chainsaw is hard to start, idles poorly, smokes excessively, or lacks power.
Why This Happens: The carburetor is responsible for mixing air and fuel in the correct proportions for combustion. If the carburetor is not properly adjusted, the air-fuel mixture will be too rich (too much fuel) or too lean (not enough fuel), leading to various engine problems.
My Experience: I once bought a used Husqvarna 136 that was a real pain to start. It would cough and sputter, and then eventually die. I almost gave up on it, but then I decided to try adjusting the carburetor. After a few tweaks, I got it running like a champ.
Important Note: Carburetor adjustment should only be attempted by someone who is comfortable working on small engines. Incorrect adjustments can damage the engine. If you are not comfortable adjusting the carburetor yourself, take your chainsaw to a qualified repair technician.
Step-by-Step Guide:
- Safety First: Always turn off the chainsaw and let it cool down completely before performing any maintenance.
- Locate the Carburetor Adjustment Screws: The carburetor adjustment screws are typically located on the side of the carburetor. They are usually labeled “H” (high speed), “L” (low speed), and “T” (idle speed). Some models only have an “LA” (low speed adjustment) and a “T”.
- Warm Up the Engine: Start the chainsaw and let it warm up for a few minutes.
- Adjust the Idle Speed: Turn the idle speed screw (T) clockwise to increase the idle speed or counterclockwise to decrease the idle speed. The goal is to set the idle speed so that the engine runs smoothly without the chain spinning.
- Adjust the Low-Speed Mixture: Turn the low-speed screw (L or LA) clockwise to lean the mixture (less fuel) or counterclockwise to richen the mixture (more fuel). The goal is to find the setting where the engine idles smoothly and responds quickly to throttle input.
- Lean Mixture: The engine will idle too fast and may stall when the throttle is applied.
- Rich Mixture: The engine will idle roughly and may smoke excessively.
- Adjust the High-Speed Mixture (If Applicable): Turn the high-speed screw (H) clockwise to lean the mixture or counterclockwise to richen the mixture. The goal is to find the setting where the engine runs smoothly at full throttle without bogging down.
- Lean Mixture: The engine will bog down and may overheat.
- Rich Mixture: The engine will smoke excessively and lack power.
- Fine-Tune the Adjustments: After making the initial adjustments, fine-tune the settings to achieve optimal performance. This may require making small adjustments to each screw and testing the chainsaw under load.
- Test the Chainsaw: Test the chainsaw by cutting a piece of wood. The engine should run smoothly at all speeds without stalling or bogging down.
Tools Needed:
- Small screwdriver
- Tachometer (optional, but recommended for precise adjustments)
Measurements and Specs:
- Idle speed: Typically 2700-3200 RPM (check your owner’s manual for the exact specification).
- Carburetor adjustment screw sensitivity: Small adjustments can make a big difference in engine performance. Make adjustments in small increments (e.g., 1/8 of a turn).
Strategic Advantage: Proper carburetor adjustment is crucial for optimal engine performance, fuel efficiency, and engine longevity. A well-tuned carburetor will ensure that your chainsaw starts easily, idles smoothly, and delivers maximum power when you need it.
Important Safety Note: When adjusting the carburetor, be extremely careful not to get your hands or clothing caught in the moving parts of the chainsaw. Wear safety glasses to protect your eyes from flying debris.
5. The Chain Champion: Sharpening and Maintaining the Chain
Problem: Your chainsaw cuts slowly, produces fine sawdust instead of chips, or pulls to one side.
Why This Happens: A dull or damaged chain will not cut efficiently and can even be dangerous. A sharp chain is essential for safe and efficient cutting.
My Experience: I learned the importance of chain sharpness the hard way. I was felling a large oak tree when my chain suddenly grabbed and kicked back. Luckily, I was able to react quickly and avoid injury. After that experience, I made it a point to always keep my chains sharp.
Step-by-Step Guide:
- Safety First: Always turn off the chainsaw and let it cool down completely before performing any maintenance. Wear gloves to protect your hands from the sharp chain.
- Secure the Chainsaw: Secure the chainsaw in a vise or on a stable surface.
- Inspect the Chain: Examine the chain for damage, such as broken or missing teeth. Replace the chain if it is severely damaged.
- Sharpen the Chain: Use a chainsaw file to sharpen each tooth on the chain.
- File Size: Use the correct size file for your chain. The Husqvarna 136 typically uses a 4.0mm (5/32 inch) file.
- Filing Angle: Maintain the correct filing angle for each tooth. The correct filing angle is typically marked on the chainsaw file guide.
- Filing Technique: File each tooth with smooth, consistent strokes. File each tooth the same number of times to ensure that they are all the same length.
- Lower the Depth Gauges: Use a depth gauge tool to lower the depth gauges (also known as rakers) in front of each cutting tooth. The depth gauges control the amount of wood that each tooth takes with each cut.
- Depth Gauge Setting: The correct depth gauge setting is typically marked on the depth gauge tool.
- Filing Technique: File the depth gauges with a flat file until they are flush with the depth gauge tool.
- Clean the Chain: Clean the chain with a brush to remove any filings or debris.
- Lubricate the Chain: Lubricate the chain with bar oil before using the chainsaw.
- Check Chain Tension: Proper chain tension is crucial for safe and efficient cutting. The chain should be snug on the bar, but you should still be able to pull it around the bar by hand. When the chain is cold, it should be able to pull away from the bar approximately 1/8″.
Tools Needed:
- Chainsaw file
- Chainsaw file guide
- Depth gauge tool
- Flat file
- Vise or stable surface
- Gloves
- Brush
- Bar oil
Measurements and Specs:
- File size: 4.0mm (5/32 inch) for Husqvarna 136
- Filing angle: Varies depending on the chain type (typically marked on the file guide)
- Depth gauge setting: Varies depending on the chain type (typically marked on the depth gauge tool)
- Chain replacement frequency: Depends on the amount of use and the type of wood being cut. A chain that is used frequently or to cut hard wood will need to be replaced more often.
Strategic Advantage: A sharp chain will cut faster, more efficiently, and more safely. Regularly sharpening and maintaining your chain will save you time, reduce the risk of injury, and extend the life of your chainsaw.
Chain Tension: The Often Overlooked Adjustment
Proper chain tension is a critical, yet often overlooked, aspect of chainsaw maintenance. Too loose, and the chain can derail, causing damage to the saw and posing a safety hazard. Too tight, and it can overheat, wear prematurely, and even break.
How to Check and Adjust Chain Tension:
- Turn off the chainsaw and let it cool down. A hot chain will expand, giving a false reading.
- Loosen the bar nuts. These are typically located on the side of the chainsaw, near the base of the bar. Don’t remove them completely, just loosen them enough to allow the bar to move.
- Locate the chain tensioning screw. This screw is usually located on the front or side of the chainsaw, near the bar.
- Adjust the tension. Turn the tensioning screw clockwise to tighten the chain, and counterclockwise to loosen it.
- Check the tension. The chain should be snug on the bar, but you should still be able to pull it around the bar by hand. When the chain is cold, it should be able to pull away from the bar approximately 1/8″.
- Tighten the bar nuts. Once you’ve achieved the correct tension, tighten the bar nuts securely.
- Recheck the tension. After tightening the bar nuts, recheck the chain tension to make sure it hasn’t changed.
My Insight: Chain tension is affected by temperature. As the chain heats up during use, it will expand. Therefore, it’s better to err on the side of slightly looser tension than too tight. I always check my chain tension several times during a long cutting session.
Case Study: Reviving a Neglected Husqvarna 136
Let me share a story about a Husqvarna 136 I rescued from a friend’s shed. It had been sitting unused for years, covered in dust and grime. He was about to throw it away, but I offered to take a look.
Diagnosis:
- The chainsaw wouldn’t start.
- The fuel tank was empty and smelled stale.
- The air filter was completely clogged.
- The spark plug was fouled.
- The chain was rusty and dull.
The Revival Process:
- Fuel System Overhaul: I drained the old fuel from the tank and replaced it with fresh fuel mixed with the correct ratio of two-stroke oil (typically 50:1). I also replaced the fuel filter.
- Air Filter Cleaning: I cleaned the air filter with warm water and soap.
- Spark Plug Service: I cleaned and gapped the spark plug.
- Chain Sharpening: I sharpened the chain using a chainsaw file and guide.
- Carburetor Adjustment: I adjusted the carburetor to optimize the air-fuel mixture.
The Result:
After a few pulls on the starter cord, the Husqvarna 136 roared back to life! It ran smoothly and cut through wood like a champ. My friend was amazed. He couldn’t believe that a chainsaw that had been left for dead could be revived so easily.
Lessons Learned:
This case study highlights the importance of regular maintenance and proper storage. Even a neglected chainsaw can be brought back to life with a little bit of effort.
Strategic Insights for Wood Processing and Firewood Preparation
Beyond the technical fixes, let’s discuss some strategic insights that can improve your overall wood processing and firewood preparation process.
- Wood Selection: Choosing the right type of wood is crucial for firewood. Hardwoods like oak, maple, and beech burn hotter and longer than softwoods like pine and fir.
- Felling Techniques: Proper felling techniques are essential for safety and efficiency. Always assess the tree for hazards, such as dead limbs or power lines, before felling. Use proper cutting techniques to control the direction of the fall.
- Bucking Strategies: Bucking logs into the desired length for firewood can be time-consuming. Use a log stand or a sawbuck to make the process easier and safer.
- Splitting Methods: Splitting firewood can be physically demanding. Consider using a hydraulic log splitter to increase efficiency and reduce strain.
- Drying Methods: Proper drying is essential for firewood to burn efficiently. Stack the firewood in a well-ventilated area and allow it to dry for at least six months, or ideally a year. I prefer to stack firewood in single rows, allowing for maximum airflow.
Safety Considerations
Working with chainsaws and processing wood can be dangerous. Always follow these safety precautions:
- Wear appropriate safety gear: This includes a helmet, safety glasses, ear protection, gloves, and chaps.
- Read and understand the owner’s manual: The owner’s manual contains important information about the chainsaw’s operation and safety features.
- Maintain a safe working distance: Keep bystanders and pets away from the work area.
- Be aware of your surroundings: Watch out for hazards, such as uneven ground, obstacles, and overhead power lines.
- Never operate a chainsaw when you are tired or under the influence of drugs or alcohol.
- Use proper lifting techniques: When lifting heavy logs, bend your knees and keep your back straight.
- Store firewood safely: Stack firewood in a stable manner to prevent it from falling.
Next Steps: Putting Your Knowledge into Action
Now that you have a better understanding of how to troubleshoot and fix common problems with your Husqvarna 136 chainsaw, it’s time to put your knowledge into action.
- Inspect your chainsaw: Take a close look at your chainsaw and identify any potential problems.
- Perform the necessary maintenance: Clean the air filter, check the spark plug, clean the fuel filter, adjust the carburetor, and sharpen the chain.
- Practice safe operating procedures: Always wear appropriate safety gear and follow the safety precautions outlined in this guide.
- Start processing wood: Fell trees, buck logs, split firewood, and stack it to dry.
Remember, practice makes perfect. The more you work with your chainsaw and process wood, the more comfortable and confident you will become. And always prioritize safety.
By following the tips and techniques outlined in this guide, you can keep your Husqvarna 136 chainsaw running smoothly for years to come and enjoy the satisfaction of processing your own wood. Good luck, and happy cutting!
