Husqvarna 120-Mark ii Problems Including Solution

The Husqvarna 120-mark ii chainsaw is a reliable tool known for its performance in various woodcutting tasks. Whether you’re a professional lumberjack or a homeowner with occasional outdoor projects, the 120-mark ii has likely proven its worth. However, like any machinery, it isn’t immune to issues that may hinder its optimal performance.

Understanding The Importance

Ensuring your Husqvarna 120-mark ii is free from common problems is crucial for maintaining its efficiency and longevity. Addressing issues promptly not only saves you time but also enhances the safety of operations. In this blog post, we’ll delve into some common problems associated with the Husqvarna 120-mark ii and provide practical solutions to keep your chainsaw running smoothly.

Common Problems with Husqvarna 120-mark ii

Starting Issues

Difficulty in Pulling the Starter Cord

One of the frustrating problems users may encounter with their Husqvarna 120-mark ii is the difficulty in pulling the starter cord. This issue can be a significant obstacle, preventing a smooth start for your chainsaw.

Solution: Check Spark Plug and Ignition System

Start by inspecting the spark plug and ignition system. Ensure the spark plug is clean and properly connected. A fouled spark plug or ignition issues can often be the culprit. If needed, replace the spark plug and troubleshoot the ignition system for a reliable start.

Solution: Ensure Proper Fuel Mixture and Clean Air Filter

Another common cause of starter cord issues is an improper fuel mixture or a clogged air filter. Check your fuel mixture ratios, making sure it aligns with the manufacturer’s recommendations. Regularly clean or replace the air filter to maintain proper airflow, ensuring an easier pull for the starter cord.

Engine Not Starting or Stalling

If your Husqvarna 120-mark ii experiences challenges in starting or frequently stalls during operation, it’s essential to identify and address the root causes promptly.

Solution: Check and Adjust Chain Tension

Improperly tensioned chains can lead to starting problems and stalling during operation. Verify that the chain tension is within the recommended range. Adjust as necessary to prevent stalling and ensure a smoother operation.

Cutting Performance

Uneven Cuts or Difficulty in Cutting Through Wood

The primary purpose of the Husqvarna 120-mark ii is to provide efficient woodcutting. If you notice uneven cuts or difficulties in cutting through wood, it’s time to assess and address the issues affecting the cutting performance.

Solution: Sharpen the Chain Regularly

A dull chain is a common cause of uneven cuts. Invest in a quality chainsaw file and sharpen the chain regularly to maintain optimal cutting performance. This simple maintenance task can significantly enhance the efficiency of your chainsaw.

Solution: Check and Adjust Chain Tension

Proper chain tension is crucial for smooth cutting performance. If the chain is slipping or getting stuck during operation, adjusting the tension according to the manufacturer’s recommendations can resolve the issue. This ensures a consistent and reliable cutting experience.

Oil and Lubrication Problems

Inadequate Chain Oiling

Proper lubrication is vital for the longevity and efficiency of your chainsaw. If you observe inadequate chain oiling, it’s crucial to address this problem promptly.

Solution: Clean and Unclog the Oiler Holes

Clogged oiler holes can restrict the flow of lubricant to the chain. Regularly inspect and clean these holes to ensure a consistent and sufficient supply of oil during operation. This simple step can prevent premature wear of the chain and guide bar.

Solution: Inspect and Replace the Oil Pump if Necessary

If cleaning the oiler holes doesn’t resolve the issue, inspect the oil pump for damage or wear. The oil pump plays a vital role in delivering oil to the chain. If it’s not functioning correctly, consider replacing it to maintain proper lubrication.

Oil Leakage or Excessive Consumption

Excessive oil leakage or consumption can be messy and costly. Here’s how you can deal with these issues.

Solution: Tighten Loose Components and Bolts

Inspect the chainsaw for loose components, especially around the oil reservoir and pump. Tighten any loose bolts or connections to prevent oil leakage. A secure and well-maintained chainsaw will not only prevent oil wastage but also contribute to a cleaner working environment.

Solution: Inspect the Guide Bar and Chain for Damage

A damaged guide bar or chain can contribute to excessive oil consumption. Regularly inspect these components and replace them if they show signs of wear. This not only improves oil efficiency but also ensures a longer lifespan for your Husqvarna 120-mark ii.

Vibration and Noise

Unusual Vibrations During Operation

Excessive vibrations during chainsaw operation can be uncomfortable and may indicate underlying issues.

Solution: Tighten Loose Components and Bolts

Frequent use can sometimes lead to loosening of components and bolts. Regularly inspect and tighten all nuts and bolts to minimize vibrations during use. This not only enhances user comfort but also contributes to safer and more effective chainsaw operation.

Excessive Noise Levels

While chainsaws are inherently noisy, excessively loud operation may point to potential problems.

Solution: Inspect the Guide Bar and Chain for Damage

A damaged or worn-out guide bar and chain can amplify noise levels. Regularly inspect these components and replace them if they show signs of wear. This not only reduces noise but also ensures a more pleasant working environment.

Solutions to Husqvarna 120-mark ii Problems

Starting Issues

Check Spark Plug and Ignition System

Starting issues with your Husqvarna 120-mark ii can often be traced back to the spark plug and ignition system. These components play a crucial role in initiating the combustion process.

Solution: Check the Spark Plug

  • Start by removing the spark plug and inspecting it for any signs of fouling, wear, or deposits. A clean, well-functioning spark plug is essential for efficient ignition.
  • Ensure that the spark plug gap is within the manufacturer’s specifications. Use a gap tool to make any necessary adjustments.
  • If the spark plug appears damaged or worn, consider replacing it with a new, compatible spark plug. This simple step can significantly improve the starting performance of your chainsaw.

Solution: Inspect the Ignition System

  • Examine the ignition system for loose connections or damaged wires. A faulty ignition system can disrupt the spark, leading to starting issues.
  • If you identify any issues with the ignition system, it’s recommended to consult the user manual for your Husqvarna 120-mark ii or seek professional assistance. Addressing ignition system problems promptly ensures a reliable start every time.

Ensure Proper Fuel Mixture and Clean Air Filter

A proper fuel mixture and a clean air filter are essential for the optimal functioning of the engine. Issues with either can contribute to starting problems.

Solution: Verify Fuel Mixture

  • Confirm that you are using the correct fuel-oil mixture as recommended by Husqvarna. Using the wrong mixture can impact combustion and hinder starting.
  • Empty the fuel tank and refill it with the appropriate fuel-oil mixture. Ensure thorough mixing to prevent uneven combustion.

Solution: Clean the Air Filter

  • Locate the air filter housing and remove the air filter. Check for dirt, debris, or oil accumulation on the filter.
  • If the air filter is dirty, clean it using mild soap and water. Allow it to dry completely before reinserting it into the chainsaw.
  • For heavily soiled or damaged air filters, consider replacing them with new, compatible filters. A clean air filter promotes optimal airflow, facilitating smooth engine starts.

Cutting Performance

Sharpen the Chain Regularly

The cutting performance of your Husqvarna 120-mark ii relies heavily on a sharp and well-maintained chain. Dull chains not only hinder performance but also pose safety risks.

Solution: Use a Quality Chainsaw File

  • Invest in a high-quality chainsaw file appropriate for your chain type and size. The file should match the chain’s pitch for effective sharpening.
  • Follow the manufacturer’s recommendations for the filing angle and depth gauge settings. Consistent and correct filing ensures a sharp cutting edge.
  • Regularly sharpen the chain, especially after prolonged use or when you notice a decrease in cutting efficiency. A sharp chain results in smoother and more precise cuts.

Check and Adjust Chain Tension

Proper chain tension is crucial for effective cutting and prevents issues such as chain slipping or getting stuck during operation.

Solution: Adjust Chain Tension

  • Refer to your Husqvarna 120-mark ii user manual for specific instructions on adjusting chain tension.
  • Use the appropriate tool to adjust the tension, ensuring that the chain is snug against the guide bar without excessive slack.
  • Regularly check the chain tension before each use to prevent complications during cutting. A well-tensioned chain ensures optimal cutting performance and extends the life of your chainsaw components.

Oil and Lubrication Problems

Clean and Unclog the Oiler Holes

Proper lubrication is crucial for preventing premature wear of the chain and guide bar. Inadequate chain oiling can lead to friction and reduced cutting efficiency.

Solution: Regularly Clean Oiler Holes

  • Periodically inspect the oiler holes on the guide bar. Clogged holes can restrict the flow of oil to the chain.
  • Use a small, pointed tool to carefully clean any debris or sawdust from the oiler holes. Ensure that the oil can flow freely to lubricate the chain during operation.

Inspect and Replace the Oil Pump if Necessary

If cleaning the oiler holes doesn’t resolve the lubrication issue, the oil pump may require attention.

Solution: Oil Pump Inspection

  • Consult your user manual for guidance on accessing and inspecting the oil pump.
  • Examine the oil pump for signs of damage or wear. If the pump is compromised, consider replacing it with a new, compatible oil pump.
  • Regularly inspecting and maintaining the oil pump ensures consistent lubrication, promoting the longevity of your chainsaw’s cutting components.

Vibration and Noise

Tighten Loose Components and Bolts

Excessive vibration during operation can be uncomfortable and may indicate loose components.

Solution: Regularly Check and Tighten Components

  • Before each use, inspect your chainsaw for loose components and bolts. Focus on areas such as the handle, guide bar, and chain tensioning mechanism.
  • Use the appropriate tools to tighten any loose components securely. This simple step minimizes vibration and contributes to a more comfortable user experience.

Inspect the Guide Bar and Chain for Damage

Damaged guide bars and chains not only affect cutting performance but can also contribute to increased noise levels.

Solution: Regularly Inspect the Guide Bar and Chain

  • Check the guide bar and chain for signs of wear, damage, or irregularities. Look for bent or damaged guide bar rails and any visible defects on the chain.
  • Replace any worn or damaged components promptly. A well-maintained guide bar and chain not only reduces noise levels but also ensures safe and effective cutting.

Maintenance Tips to Prevent Future Issues

Maintaining your Husqvarna 120-mark ii chainsaw is essential for ensuring consistent performance and longevity. Here are some practical maintenance tips to prevent future issues and keep your chainsaw in top-notch condition.

Regular Cleaning and Inspection

Clean the Exterior

Regularly clean the exterior of your Husqvarna 120-mark ii to prevent the accumulation of dirt, sawdust, and debris. A clean chainsaw not only looks better but also functions more efficiently. Use a brush or compressed air to remove debris from vents, handles, and other exterior components.

Inspect for Wear and Damage

Perform a thorough inspection of key components such as the guide bar, chain, and sprocket after each use. Look for signs of wear, damage, or irregularities. Promptly address any issues to prevent further damage and ensure safe operation.

Check for Loose Bolts and Fasteners

Vibrations during operation can cause bolts and fasteners to loosen over time. Regularly check and tighten all nuts, bolts, and screws using the appropriate tools. This simple step helps maintain the structural integrity of your chainsaw.

Clean the Air Filter

A clean air filter is crucial for optimal engine performance. Regularly remove and clean the air filter according to the manufacturer’s recommendations. If the filter is heavily soiled or damaged, replace it with a new, compatible air filter.

Proper Storage Practices

Empty the Fuel Tank

If you plan to store your chainsaw for an extended period, empty the fuel tank to prevent fuel deterioration and carburetor issues. Run the engine until it stalls to use up any remaining fuel in the carburetor.

Store in a Cool, Dry Place

Choose a cool, dry storage location for your chainsaw to prevent rust and corrosion. Avoid leaving it exposed to the elements, and consider using a cover for additional protection.

Secure the Chain and Guide Bar

When storing your Husqvarna 120-mark ii, loosen the chain tension slightly to relieve stress on the guide bar and chain. Store the chainsaw in a way that minimizes pressure on the guide bar and chain to prevent warping.

Remove the Spark Plug

For prolonged storage, consider removing the spark plug and adding a small amount of two-stroke oil to the cylinder. Pull the starter cord a few times to distribute the oil and then reinstall the spark plug. This helps prevent cylinder corrosion during storage.

Recommended Maintenance Schedule

Daily Checks Before Use

  • Chain Tension: Ensure the chain is properly tensioned.
  • Air Filter: Check and clean or replace the air filter.
  • Fuel Mixture: Confirm the correct fuel-oil mixture.

Weekly Maintenance

  • Exterior Cleaning: Wipe down the chainsaw and remove debris.
  • Inspect Guide Bar: Look for wear, cracks, or other damage.
  • Tighten Fasteners: Check for loose bolts and tighten as needed.

Monthly Maintenance

  • Spark Plug Inspection: Remove and inspect the spark plug, cleaning or replacing it if necessary.
  • Chain Sharpness: Sharpen the chain if you notice a decrease in cutting efficiency.
  • Oiler Hole Cleaning: Ensure oiler holes are free from debris.

Seasonal Maintenance

  • Fuel System Check: Inspect the fuel system for any issues.
  • Storage Preparation: Follow proper storage practices if the chainsaw won’t be used for an extended period.
  • Professional Inspection: Consider a professional inspection for more in-depth checks and adjustments.

Following this maintenance schedule helps prevent potential issues, prolonging the life of your Husqvarna 120-mark ii and ensuring it’s always ready for the next cutting task.


In the journey of harnessing the power of the Husqvarna 120-Mark II chainsaw, we’ve explored common challenges that may arise and equipped ourselves with solutions to overcome them. Now, let’s take a moment to recap the key points and underscore the paramount importance of regular maintenance for the sustained excellence of your chainsaw.

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