Husqvarna L 65 Chainsaw Restore Tips (7 Pro Fixes)

Let’s talk about breathing new life into a classic chainsaw. I’m a firm believer that with a little elbow grease and the right knowledge, even a well-worn machine like the Husqvarna L 65 can be restored to its former glory. And, importantly, we’ll do it in a way that’s mindful of our furry friends.

Husqvarna L 65 Chainsaw Restore: 7 Pro Fixes

The Husqvarna L 65 is a workhorse, a chainsaw built in a time when things were made to last. It’s a saw that many of us in the wood processing and firewood preparation world have a soft spot for. These saws were common from the early 1970s until the mid-1980s, and while they are older, they still have a lot to offer. However, time takes its toll. Over the years, I’ve worked on countless L 65s, and I’ve learned a few tricks to bring them back to peak performance. Here are seven pro fixes that I’ve found consistently effective, presented with a focus on safety and environmental consciousness, especially around pets.

1. Carburetor Overhaul: Getting the Air-Fuel Mix Right

The Importance of a Clean Carburetor: The carburetor is the heart of your L 65. It mixes air and fuel in the correct ratio to allow the engine to run smoothly. Over time, however, fuel can break down, leaving varnish deposits that clog the tiny passages within the carburetor. This can lead to hard starting, poor idling, and a loss of power.

Pet-Friendly Carburetor Cleaning: When cleaning carburetors, it’s essential to be mindful of the chemicals you use, particularly if you have pets. Traditional carburetor cleaners can contain harsh solvents that are harmful if ingested or inhaled. I recommend using citrus-based cleaners, which are biodegradable and less toxic. They are not completely harmless, but they are a safer alternative.

Step-by-Step Carburetor Cleaning:

1. Disassembly: Carefully remove the carburetor from the chainsaw, taking note of the fuel lines and linkages. Take pictures as you go; it will help with reassembly.
2. Inspection: Before you start cleaning, inspect the carburetor for any obvious damage, such as cracks or broken parts. Replace any damaged components.
3. Cleaning: Disassemble the carburetor completely, removing the jets, needle valve, and any other removable parts. Soak the parts in your citrus-based cleaner for at least 30 minutes. Use a small brush (old toothbrush works great) to scrub away any deposits. Pay particular attention to the tiny passages in the jets. I also recommend using compressed air to blow out any remaining debris.
4. Reassembly: Carefully reassemble the carburetor, making sure that all parts are properly seated. Refer to your photos or a parts diagram if needed.
5. Adjustment: Once the carburetor is reinstalled, you’ll need to adjust the idle and high-speed screws to achieve optimal performance. A good starting point is to turn both screws in until they are lightly seated, then back them out 1 1/2 turns. Fine-tune from there, listening to the engine and adjusting until it runs smoothly.

My Experience: I once worked on an L 65 that had been sitting in a shed for over 10 years. The carburetor was completely gummed up with old fuel. After a thorough cleaning using a citrus-based cleaner and some compressed air, the saw fired right up and ran like new.

Pro Tip: When reassembling, replace any worn gaskets or O-rings. This will help prevent fuel leaks and ensure a good seal.

2. Ignition System Check: Sparking the Engine Back to Life

The Role of the Ignition System: The ignition system is responsible for creating the spark that ignites the air-fuel mixture in the cylinder. A weak or non-existent spark will prevent the engine from starting or running properly.

Testing the Ignition System:

1. Spark Plug: Start by removing the spark plug and inspecting it. Look for cracks, excessive wear, or carbon buildup. Clean the spark plug with a wire brush or replace it if necessary. Check the gap using a spark plug gap tool. The correct gap for the L 65 is typically around 0.5mm (0.020 inches).
2. Ignition Coil: The ignition coil is responsible for generating the high-voltage spark. To test the coil, you’ll need a multimeter. Set the multimeter to measure resistance (ohms). Disconnect the spark plug wire from the spark plug. Connect one lead of the multimeter to the spark plug wire terminal on the coil and the other lead to the engine ground. A healthy coil should have a resistance reading within the manufacturer’s specifications (usually around 3-5 ohms). If the resistance is outside of this range, the coil is likely faulty and needs to be replaced.
3. Points and Condenser (If Applicable): Older L 65s may have a points and condenser ignition system. Inspect the points for pitting or corrosion. Clean the points with a points file or replace them if necessary. The condenser can be tested using a multimeter. Set the multimeter to measure capacitance (microfarads). Connect the leads of the multimeter to the condenser terminals. A healthy condenser should have a capacitance reading within the manufacturer’s specifications. If the capacitance is outside of this range, the condenser is likely faulty and needs to be replaced. (Later models have electronic ignition and do not have points and condenser)

Replacing the Ignition Coil: Replacing the ignition coil is a relatively straightforward task. Remove the old coil, making sure to disconnect the spark plug wire and any other wires connected to the coil. Install the new coil, connecting the wires in the same way they were connected to the old coil. Set the air gap between the coil and the flywheel. The correct air gap is typically around 0.3mm (0.012 inches). You can use a business card or a feeler gauge to set the air gap.

My Experience: I had an L 65 that was consistently hard to start. After checking the spark plug and finding it to be in good condition, I tested the ignition coil and found that it had a very weak spark. Replacing the coil completely solved the problem.

Pro Tip: When working on the ignition system, always disconnect the spark plug wire from the spark plug to prevent accidental starting.

3. Fuel System Refresh: Ensuring a Clean Fuel Supply

The Importance of Clean Fuel: A clean fuel supply is essential for the proper operation of your L 65. Old or contaminated fuel can clog the carburetor and fuel lines, leading to poor performance and engine damage.

Fuel Tank Cleaning:

1. Empty the Tank: Start by emptying the fuel tank completely. Dispose of the old fuel properly. Do not pour it down the drain or onto the ground.
2. Rinse the Tank: Rinse the fuel tank with fresh fuel to remove any remaining debris.
3. Inspect the Fuel Filter: Remove the fuel filter from the fuel tank and inspect it. If the filter is clogged or damaged, replace it.
4. Clean the Fuel Lines: Disconnect the fuel lines from the carburetor and fuel tank. Use compressed air to blow out any debris from the fuel lines. Replace the fuel lines if they are cracked or brittle.
5. Check the Fuel Cap Vent: The fuel cap vent allows air to enter the fuel tank as fuel is used. If the vent is clogged, it can create a vacuum in the tank, preventing fuel from flowing to the carburetor. Clean the vent with a small wire or needle.

Fuel Recommendations:

• Always use fresh, high-quality gasoline with an octane rating of 87 or higher.
• Mix the gasoline with a high-quality two-stroke oil at the correct ratio (usually 50:1).
• Use a fuel stabilizer to prevent the fuel from breaking down and forming varnish deposits.
• Store fuel in a clean, airtight container.

My Experience: I once had an L 65 that would only run for a few minutes before stalling. After checking the fuel system, I discovered that the fuel filter was completely clogged with debris. Replacing the filter solved the problem.

Pro Tip: When mixing fuel, always use a measuring container to ensure that you are using the correct ratio of gasoline to oil. Too much oil can cause the engine to smoke and run poorly, while too little oil can lead to engine damage.

4. Cylinder and Piston Inspection: Evaluating Engine Health

Assessing Engine Condition: The cylinder and piston are critical components of the engine. Inspecting them can reveal valuable information about the overall health of the engine.

Performing the Inspection:

1. Remove the Muffler: Remove the muffler to gain access to the cylinder.
2. Inspect the Cylinder: Look for scratches, scoring, or other damage on the cylinder walls. Minor scratches are usually not a problem, but deep scratches or scoring can indicate a serious problem.
3. Inspect the Piston: Look for scratches, scoring, or other damage on the piston. Also, check the piston rings for wear or damage. The piston rings should move freely in their grooves.
4. Check Compression: Use a compression tester to check the compression of the engine. The compression reading should be within the manufacturer’s specifications. Low compression can indicate worn piston rings, a damaged cylinder, or a leaky head gasket.

Addressing Issues:

• Minor Scratches: Minor scratches on the cylinder walls can often be smoothed out with a honing tool.
• Deep Scratches or Scoring: Deep scratches or scoring on the cylinder walls may require the cylinder to be re-bored or replaced.
• Worn Piston Rings: Worn piston rings should be replaced.
• Damaged Piston: A damaged piston should be replaced.

My Experience: I once inspected an L 65 that had very low compression. After removing the cylinder head, I discovered that the piston rings were completely worn out. Replacing the piston rings restored the engine’s compression and performance.

Pro Tip: When working on the cylinder and piston, always use clean tools and work in a clean environment. This will help prevent dirt and debris from entering the engine.

5. Chain and Bar Maintenance: Maximizing Cutting Efficiency

Keeping the Cutting Edge Sharp: The chain and bar are the components that do the actual cutting. Proper maintenance of these components is essential for maximizing cutting efficiency and safety.

Chain Sharpening:

• Use a chainsaw file to sharpen the chain.
• Maintain the correct filing angle and depth.
• Sharpen each tooth evenly.
• Use a chain filing guide to ensure consistent sharpening.

Bar Maintenance:

• Clean the bar regularly to remove sawdust and debris.
• Check the bar rails for wear.
• Dress the bar rails with a bar rail dressing tool.
• Lubricate the bar with chainsaw bar oil.

Chain Tension:

• Adjust the chain tension so that the chain is snug on the bar but can still be pulled around by hand.
• Check the chain tension regularly, especially when the chain is new.
• A loose chain can come off the bar, while a tight chain can cause excessive wear.

My Experience: I once worked on an L 65 that had a dull chain and a worn bar. After sharpening the chain and dressing the bar rails, the saw cut much faster and more efficiently.

Pro Tip: Always wear safety glasses when sharpening the chain.

6. Oiling System Check: Preventing Chain and Bar Wear

Ensuring Proper Lubrication: The oiling system is responsible for lubricating the chain and bar. Proper lubrication is essential for preventing excessive wear and damage.

Checking the Oiling System:

1. Check the Oil Level: Make sure that the oil reservoir is full.
2. Check the Oil Output: Start the chainsaw and hold it over a piece of cardboard. The chain should be throwing off a steady stream of oil.
3. Inspect the Oil Pump: If the chain is not getting enough oil, the oil pump may be faulty. Remove the oil pump and inspect it for wear or damage. Replace the oil pump if necessary.
4. Clean the Oil Passages: Clean the oil passages in the bar and chainsaw to remove any debris.

Oil Recommendations:

• Use a high-quality chainsaw bar oil.
• Use a bar oil that is appropriate for the temperature.
• Do not use motor oil or other types of oil in the chainsaw bar oil reservoir.

My Experience: I once had an L 65 that was not oiling the chain properly. After inspecting the oil pump, I discovered that it was clogged with debris. Cleaning the oil pump solved the problem.

Pro Tip: Always use a chainsaw bar oil that is designed for use in chainsaws. Motor oil and other types of oil can damage the oil pump and chain.

7. Safety Features Inspection and Upgrade: Prioritizing Safe Operation

The Importance of Safety: Chainsaws are powerful tools that can be dangerous if not used properly. It is essential to inspect and maintain the safety features of your L 65 to ensure safe operation.

Safety Features to Inspect:

• Chain Brake: The chain brake is a safety device that stops the chain from rotating in the event of a kickback. Test the chain brake to make sure that it is working properly.
• Throttle Lockout: The throttle lockout prevents the throttle from being accidentally engaged. Test the throttle lockout to make sure that it is working properly.
• Hand Guards: The hand guards protect your hands from debris and from the chain in the event of a kickback. Inspect the hand guards for damage.
• Anti-Vibration System: The anti-vibration system reduces the amount of vibration that is transmitted to your hands and arms. Inspect the anti-vibration system for damage.

Upgrading Safety Features:

• Consider adding a chain catcher to prevent the chain from flying off the bar in the event of a chain break.
• Consider adding a wrap-around handle for improved control.

Pet Safety Considerations:

• Always keep pets away from the chainsaw when it is in operation.
• Store the chainsaw in a secure location where pets cannot access it.
• Clean up any sawdust or debris after using the chainsaw to prevent pets from ingesting it.

My Experience: I once witnessed a chainsaw kickback that could have been serious if the operator had not been using the chain brake. The chain brake stopped the chain from rotating and prevented the operator from being injured.

Pro Tip: Always wear appropriate safety gear when operating a chainsaw, including safety glasses, hearing protection, gloves, and chaps.

Case Study: Reviving a Neglected L 65 for Firewood Season

I had a neighbor who inherited an L 65 from his grandfather. It had been sitting in a barn for years, completely neglected. He brought it to me, hoping I could get it running in time for firewood season.

The Challenge: The chainsaw was in rough shape. The carburetor was completely gummed up, the fuel lines were cracked, the ignition coil was weak, and the chain was dull.

The Solution:

1. Complete Carburetor Overhaul: I disassembled the carburetor and cleaned it thoroughly using a citrus-based cleaner. I replaced all of the gaskets and O-rings.
2. Fuel System Refresh: I replaced the fuel lines and the fuel filter. I also cleaned the fuel tank.
3. Ignition System Upgrade: I replaced the ignition coil with a new one.
4. Chain and Bar Maintenance: I sharpened the chain and dressed the bar rails.
5. Oiling System Check: I cleaned the oil pump and oil passages.

The Result: After completing these repairs, the chainsaw started easily and ran smoothly. My neighbor was thrilled to have a reliable chainsaw for firewood season.

Strategic Advantages of Restoring an L 65

• Cost Savings: Restoring an old chainsaw is often much cheaper than buying a new one.
• Environmental Benefits: Restoring an old chainsaw helps to reduce waste and conserve resources.
• Personal Satisfaction: Restoring an old chainsaw can be a rewarding experience.

Next Steps and Implementation Guidance

If you have a Husqvarna L 65 that needs some TLC, I encourage you to give these pro fixes a try. With a little effort, you can bring your old chainsaw back to life and enjoy many more years of reliable service. Remember to prioritize safety and environmental consciousness throughout the process.

Actionable Steps:

1. Gather Your Tools and Supplies: Make sure you have the necessary tools and supplies before you start working on your chainsaw.
2. Follow the Step-by-Step Instructions: Follow the step-by-step instructions carefully.
3. Take Your Time: Don’t rush the process. Take your time and do the job right.
4. Ask for Help: If you are unsure about anything, ask for help from a qualified mechanic.
5. Enjoy Your Restored Chainsaw: Once you have restored your chainsaw, take it out and enjoy using it.

Restoring a Husqvarna L 65 is a worthwhile project that can save you money, reduce waste, and provide you with a reliable chainsaw for years to come. With these seven pro fixes, you can bring your old chainsaw back to life and enjoy the satisfaction of a job well done. And remember, always prioritize safety, especially when working around our furry friends.

Learn more