Chainsaw Husqvarna 350 Repair Tips (Restoring Classic Power)

Let’s talk chainsaws, but first, indulge me in a quick story. I remember when my old golden retriever, Rusty, a real sweetheart but not exactly known for his mechanical prowess, decided he wanted to “help” me work on my Husqvarna 350. He ended up covered in bar oil and looking utterly dejected. That’s the day I realized even the most enthusiastic amateur needs a good guide. So, if Rusty could understand this, so can you! This article focuses on repairing and restoring the Husqvarna 350, a true workhorse of a chainsaw.

Chainsaw Husqvarna 350 Repair Tips: Restoring Classic Power

The Husqvarna 350. It’s a chainsaw that many, including myself, consider a legend. It’s a reliable, powerful saw that, with proper care, can last for decades. However, like any machine, it’s prone to wear and tear. This guide will walk you through common repair issues and restoration techniques to bring your Husqvarna 350 back to its former glory. I’ll share my personal experiences, technical insights, and practical tips to help you tackle these repairs with confidence.

Why Restore a Husqvarna 350?

Before diving into the repairs, let’s consider why restoring a classic like the Husqvarna 350 is worthwhile.

• Durability and Reliability: These saws were built to last. The quality of materials and construction is often superior to newer, budget-friendly models.
• Cost-Effectiveness: Repairing your existing saw is often cheaper than buying a new one, especially if the core components are still in good condition.
• Familiarity and Comfort: You know your saw. You’re comfortable with its handling and performance. Restoring it allows you to retain that familiarity.
• Environmental Responsibility: Repairing and reusing existing equipment reduces waste and minimizes your environmental footprint.
• Personal Satisfaction: There’s a real sense of accomplishment in bringing a classic machine back to life.

Key Concepts: Understanding Your Chainsaw

Before we start wrenching, let’s define some key terms and concepts. This will make the repair process much smoother.

• Two-Stroke Engine: The Husqvarna 350 uses a two-stroke engine, which means it completes a power cycle with only one revolution of the crankshaft. It requires a mixture of gasoline and two-stroke oil for lubrication.
• Air Filter: Prevents dirt and debris from entering the engine. A clean air filter is crucial for performance and engine life.
• Fuel Filter: Filters fuel to prevent contaminants from reaching the carburetor. A clogged fuel filter can cause starting problems.
• Carburetor: Mixes air and fuel in the correct proportions for combustion.
• Spark Plug: Ignites the air-fuel mixture in the cylinder.
• Chain Brake: A safety device that stops the chain instantly in case of kickback.
• Clutch: Connects the engine to the chain drive.
• Bar and Chain: The bar guides the chain, and the chain does the cutting.
• Green Wood vs. Seasoned Wood: Green wood is freshly cut and has a high moisture content. Seasoned wood has been dried and has a lower moisture content. Cutting green wood requires a sharper chain and more power.

Common Problems and Repair Solutions

Now, let’s tackle the most common problems you might encounter with your Husqvarna 350 and how to fix them.

1. Chainsaw Won’t Start

This is the most frequent complaint I hear. Here’s a step-by-step troubleshooting guide:

• Step 1: Check the Fuel:
  • Problem: Stale fuel is a common culprit. Two-stroke fuel can degrade quickly, especially if it’s been sitting for a while.
  • Solution: Drain the old fuel and replace it with fresh fuel mixed with the correct ratio of two-stroke oil (usually 50:1). I always use premium gasoline and a high-quality two-stroke oil. My personal preference is Stihl Ultra, but Husqvarna’s own oil is also excellent.
  • Personal Experience: I once left a saw with fuel in it for a whole winter. It refused to start in the spring. Draining and replacing the fuel was all it took. Now, I always drain the fuel before storing my saws for extended periods.
• Step 2: Check the Spark Plug:
  • Problem: A fouled or damaged spark plug can prevent the engine from firing.
  • Solution: Remove the spark plug and inspect it. Look for signs of fouling (carbon buildup), damage, or wear. Clean the spark plug with a wire brush or replace it with a new one. The correct spark plug for a Husqvarna 350 is typically an NGK BPMR7A or Champion RCJ7Y. The gap should be 0.020″ (0.5mm).
  • Tool Specification: Spark plug wrench.
  • Personal Experience: I once had a saw that would start but run poorly. The spark plug looked fine at first glance, but a closer inspection revealed a hairline crack in the insulator. Replacing the spark plug solved the problem instantly.
• Step 3: Check the Air Filter:
  • Problem: A clogged air filter restricts airflow to the engine, making it difficult to start.
  • Solution: Remove the air filter and inspect it. Clean it with warm, soapy water or replace it if it’s heavily soiled or damaged. Allow the air filter to dry completely before reinstalling it.
  • Personal Experience: I’ve seen air filters so clogged with sawdust that they looked like felt. Regular cleaning is essential, especially when cutting dry or dusty wood.
• Step 4: Check the Fuel Filter:
  • Problem: A clogged fuel filter restricts fuel flow to the carburetor.
  • Solution: Locate the fuel filter inside the fuel tank. Use a piece of wire or a hooked tool to pull it out. Inspect the filter and replace it if it’s dirty or clogged.
  • Personal Experience: Fuel filters are cheap and easy to replace. I recommend replacing them annually, especially if you use your saw frequently.
• Step 5: Check the Carburetor:
  • Problem: A dirty or clogged carburetor can prevent the engine from starting.
  • Solution: This is a more complex repair and may require disassembling the carburetor. I’ll cover carburetor cleaning in more detail later. For now, try spraying carburetor cleaner into the carburetor intake while pulling the starter cord. This might dislodge any debris and allow the engine to start.
  • Personal Experience: Carburetor issues are often caused by old fuel that has gummed up the internal passages. A thorough cleaning is usually required to resolve the problem.
• Step 6: Check the Compression:
  • Problem: Low compression can indicate worn piston rings or a damaged cylinder.
  • Solution: Use a compression tester to check the engine’s compression. A healthy Husqvarna 350 should have a compression reading of around 120-150 PSI. If the compression is significantly lower, it may indicate a more serious engine problem that requires professional repair.
  • Tool Specification: Compression tester.
  • Personal Experience: Low compression is a sign of significant engine wear. While you can sometimes get away with replacing the piston rings, it’s often more cost-effective to replace the entire engine if the cylinder is also damaged.

2. Chainsaw Runs Poorly or Stalls

If your chainsaw starts but runs poorly, stalls frequently, or lacks power, here are some potential causes and solutions:

• Step 1: Carburetor Adjustment:
  • Problem: An improperly adjusted carburetor can cause a variety of running problems.
  • Solution: The Husqvarna 350 carburetor has three adjustment screws:
    • L (Low-Speed): Adjusts the fuel mixture at idle and low speeds.
    • H (High-Speed): Adjusts the fuel mixture at high speeds.
    • T (Idle Speed): Adjusts the engine’s idle speed.
  • Adjustment Procedure:
    1. Start the engine and let it warm up.
    2. Adjust the “T” screw until the chain stops moving at idle.
    3. Turn the “L” screw clockwise until the engine starts to stumble or stall. Then, turn it counterclockwise until the engine runs smoothly at idle.
    4. Make a test cut and listen to the engine. If it sounds like it’s struggling or lacking power, slowly turn the “H” screw counterclockwise until the engine runs smoothly and has good power.
  • Important Note: Be careful not to run the engine too lean (too much air, not enough fuel), as this can damage the engine.
  • Personal Experience: Carburetor adjustment is a skill that takes practice. It’s best to make small adjustments and test the engine after each adjustment.
• Step 2: Clogged Fuel Line:
  • Problem: A clogged fuel line can restrict fuel flow to the carburetor.
  • Solution: Inspect the fuel line for cracks, kinks, or clogs. Replace the fuel line if necessary.
  • Personal Experience: Fuel lines can become brittle and crack over time, especially if they’re exposed to sunlight or extreme temperatures.
• Step 3: Air Leak:
  • Problem: An air leak can cause the engine to run lean and stall.
  • Solution: Check the intake manifold, carburetor mounting bolts, and crankshaft seals for leaks. Use carburetor cleaner or starting fluid to spray around these areas while the engine is running. If the engine speed changes when you spray a particular area, it indicates an air leak.
  • Personal Experience: Air leaks can be difficult to find. A common source of air leaks is the crankshaft seals, which can dry out and crack over time.

3. Chainsaw Chain Not Oiling

Proper chain lubrication is crucial for chain and bar life. If your chain isn’t oiling properly, here’s what to check:

• Step 1: Check the Oil Tank:
  • Problem: The oil tank might be empty.
  • Solution: Fill the oil tank with bar and chain oil. I recommend using a high-quality bar and chain oil specifically designed for chainsaws.
  • Personal Experience: I’ve seen people mistakenly fill the oil tank with gasoline. This is a dangerous mistake that can damage the chain and bar.
• Step 2: Check the Oil Filter:
  • Problem: The oil filter might be clogged.
  • Solution: Locate the oil filter inside the oil tank. Use a piece of wire or a hooked tool to pull it out. Inspect the filter and clean or replace it if it’s dirty or clogged.
  • Personal Experience: The oil filter is often overlooked, but it’s just as important as the fuel filter.
• Step 3: Check the Oil Pump:
  • Problem: The oil pump might be malfunctioning.
  • Solution: The oil pump is responsible for pumping oil from the tank to the bar and chain. If the oil pump is not working, you’ll need to remove it and inspect it for damage. You may need to replace the oil pump if it’s faulty.
  • Personal Experience: Oil pumps can fail due to wear and tear or debris clogging the pump mechanism.
• Step 4: Check the Bar and Chain:
  • Problem: The bar and chain might be worn or damaged.
  • Solution: Inspect the bar for wear or damage. Clean the bar groove and oil holes to ensure proper lubrication. Sharpen or replace the chain if it’s dull or damaged.
  • Personal Experience: A worn bar can cause the chain to bind and prevent proper oiling.

4. Chainsaw Chain Keeps Coming Off

A chain that frequently comes off the bar is a safety hazard. Here’s how to address this issue:

• Step 1: Check Chain Tension:
  • Problem: Incorrect chain tension is the most common cause of chain derailment.
  • Solution: Adjust the chain tension so that it’s snug but not too tight. You should be able to pull the chain slightly away from the bar, but it shouldn’t sag.
  • Personal Experience: Chain tension changes with temperature. Adjust the chain tension after the saw has warmed up.
• Step 2: Check Bar Condition:
  • Problem: A worn or damaged bar can cause the chain to come off.
  • Solution: Inspect the bar for wear, especially in the groove where the chain runs. If the bar is worn or damaged, replace it.
  • Personal Experience: Bar wear is often uneven. Check the bar for wear in the area where you make most of your cuts.
• Step 3: Check Sprocket Condition:
  • Problem: A worn sprocket can cause the chain to skip and come off.
  • Solution: Inspect the sprocket for wear or damage. Replace the sprocket if it’s worn or damaged.
  • Personal Experience: Sprockets wear out over time, especially if you use your saw frequently.
• Step 4: Use the Correct Chain:
  • Problem: Using the wrong chain for your bar can cause the chain to come off.
  • Solution: Make sure you’re using the correct chain pitch and gauge for your bar. The chain pitch and gauge are usually stamped on the bar.
  • Personal Experience: I once tried to use a chain that was slightly too wide for my bar. The chain kept coming off until I realized my mistake.

5. Chainsaw Chain Dull Quickly

A dull chain makes cutting difficult and can be dangerous. Here’s how to keep your chain sharp:

• Step 1: Sharpen the Chain Regularly:
  • Solution: Sharpen the chain using a chainsaw file or a chainsaw sharpener. Sharpen the chain every time you refuel the saw.
  • Tool Specification: Chainsaw file or chainsaw sharpener.
  • Personal Experience: A sharp chain makes a huge difference in cutting performance. I prefer to use a chainsaw file because it gives me more control over the sharpening process.
• Step 2: Maintain the Correct Filing Angle:
  • Solution: Use a filing guide to maintain the correct filing angle. The correct filing angle is usually stamped on the chain.
  • Personal Experience: Maintaining the correct filing angle is crucial for achieving a sharp and efficient cutting edge.
• Step 3: Avoid Cutting Dirty Wood:
  • Solution: Avoid cutting wood that is dirty or contains rocks or other debris. Dirt and debris can dull the chain quickly.
  • Personal Experience: I always try to clean the wood before cutting it to avoid dulling the chain.
• Step 4: Use the Correct Chain for the Job:
  • Solution: Use a chain that is designed for the type of wood you’re cutting. Some chains are better suited for cutting softwoods, while others are better suited for cutting hardwoods.
  • Personal Experience: Using the correct chain for the job can extend the life of the chain and improve cutting performance.

Restoring Classic Power: Beyond the Basics

Now that we’ve covered the common problems, let’s delve into some restoration techniques that can bring your Husqvarna 350 back to its former glory.

1. Carburetor Overhaul

A thorough carburetor cleaning and rebuild can significantly improve your chainsaw’s performance.

• Step 1: Disassemble the Carburetor:
  • Carefully disassemble the carburetor, taking note of the location of each part.
  • Important Note: Work in a clean area and use a parts tray to keep track of the small parts.
• Step 2: Clean the Carburetor:
  • Clean all the carburetor parts with carburetor cleaner. Use a small brush or pipe cleaner to clean the small passages.
  • Personal Experience: I use compressed air to blow out the carburetor passages after cleaning them with carburetor cleaner.
• Step 3: Rebuild the Carburetor:
  • Replace the carburetor gaskets and diaphragms with new ones.
  • Reassemble the carburetor, following the manufacturer’s instructions.
• Step 4: Adjust the Carburetor:
  • Adjust the carburetor according to the procedure outlined earlier.

2. Replacing the Piston Rings

Worn piston rings can cause low compression and poor engine performance. Replacing the piston rings can restore the engine’s power.

• Step 1: Remove the Cylinder:
  • Remove the muffler, carburetor, and spark plug.
  • Remove the cylinder head bolts and carefully remove the cylinder.
• Step 2: Remove the Piston:
  • Remove the piston pin retaining clips and carefully remove the piston pin.
  • Remove the piston from the connecting rod.
• Step 3: Remove the Piston Rings:
  • Use a piston ring expander tool to carefully remove the piston rings.
• Step 4: Install the New Piston Rings:
  • Install the new piston rings, making sure to stagger the ring gaps.
• Step 5: Reinstall the Piston and Cylinder:
  • Reinstall the piston and cylinder, following the reverse order of disassembly.
  • Important Note: Use a new base gasket when reinstalling the cylinder.

3. Replacing the Crankshaft Seals

Leaky crankshaft seals can cause air leaks and poor engine performance. Replacing the crankshaft seals can restore the engine’s sealing ability.

• Step 1: Remove the Flywheel and Clutch:
  • Remove the flywheel and clutch using the appropriate tools.
• Step 2: Remove the Old Crankshaft Seals:
  • Use a seal puller or a screwdriver to carefully remove the old crankshaft seals.
• Step 3: Install the New Crankshaft Seals:
  • Use a seal installer or a socket to carefully install the new crankshaft seals.
  • Important Note: Lubricate the seals with oil before installing them.
• Step 4: Reinstall the Flywheel and Clutch:
  • Reinstall the flywheel and clutch, following the reverse order of disassembly.

Safety First: Protecting Yourself

Chainsaw repair can be dangerous. Always follow these safety precautions:

• Wear Safety Glasses: Protect your eyes from flying debris.
• Wear Gloves: Protect your hands from cuts and abrasions.
• Disconnect the Spark Plug: Prevent accidental starting.
• Work in a Well-Ventilated Area: Avoid breathing harmful fumes.
• Use the Correct Tools: Avoid damaging the saw or injuring yourself.
• Follow the Manufacturer’s Instructions: Consult the owner’s manual for specific repair procedures.

Case Study: Bringing a Neglected 350 Back to Life

I once acquired a Husqvarna 350 that had been sitting in a barn for years. It was covered in dust and grime, and the engine was seized. Here’s how I restored it:

• Initial Assessment: The saw was in rough shape. The fuel tank was full of stale fuel, the air filter was completely clogged, and the chain was rusty.
• Cleaning and Disassembly: I started by cleaning the saw thoroughly. Then, I disassembled the engine and carburetor.
• Parts Replacement: I replaced the fuel filter, air filter, spark plug, carburetor gaskets, and piston rings.
• Engine Reassembly: I reassembled the engine, making sure to lubricate all the parts properly.
• Carburetor Adjustment: I adjusted the carburetor to ensure smooth running.
• Final Touches: I sharpened the chain and lubricated the bar.
• Result: The saw started on the second pull and ran like new. It was a very satisfying restoration project.

Strategic Advantages of Proper Maintenance

Regular maintenance and timely repairs offer several strategic advantages:

• Extended Lifespan: Proper care can significantly extend the lifespan of your chainsaw.
• Improved Performance: A well-maintained saw will perform better and cut more efficiently.
• Reduced Downtime: Regular maintenance can prevent breakdowns and reduce downtime.
• Increased Safety: A well-maintained saw is safer to operate.
• Higher Resale Value: A well-maintained saw will have a higher resale value.

Costs and Timing

The cost of repairing a Husqvarna 350 can vary depending on the extent of the damage and the parts that need to be replaced. A simple tune-up, including replacing the fuel filter, air filter, and spark plug, might cost around $20-$30. A more extensive repair, such as replacing the piston rings or crankshaft seals, could cost $100-$200 or more.

The time required for a repair can also vary depending on the complexity of the job. A simple tune-up might take an hour or two, while a more extensive repair could take several hours or even a few days.

Next Steps: Getting Started

Ready to start working on your Husqvarna 350? Here are some practical next steps:

• Gather Your Tools: Make sure you have the necessary tools, including a spark plug wrench, screwdrivers, pliers, sockets, and a compression tester.
• Order Parts: Order the parts you need from a reputable supplier.
• Consult the Owner’s Manual: Refer to the owner’s manual for specific repair procedures and safety information.
• Watch Online Tutorials: Watch online tutorials to learn how to perform specific repairs.
• Start with Simple Repairs: Start with simple repairs, such as replacing the fuel filter or air filter.
• Don’t Be Afraid to Ask for Help: If you’re unsure about a particular repair, don’t be afraid to ask for help from a qualified mechanic.

Conclusion

Restoring a Husqvarna 350 is a rewarding experience. By following these repair tips and restoration techniques, you can bring your classic chainsaw back to life and enjoy its reliable power for years to come. Remember to prioritize safety and take your time. With a little patience and effort, you can keep your Husqvarna 350 running strong. So, grab your tools, put on your safety glasses, and let’s get to work! Just keep the bar oil away from Rusty… or any other curious pets!

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