Struggling with your chainsaw? The Husqvarna 120 Mark II is a reliable tool, but like any
machine, it can face issues over time.
From starting problems to chain tension troubles, these common Husqvarna 120 Mark II
problems can slow you down.
Don’t worry this guide covers 10 frequent issues and their fixes to keep your chainsaw running
smoothly!
Husqvarna 120 Mark II Problems (Short Overview)
The Husqvarna 120 Mark II can face issues like trouble starting, poor chain tension, or cutting
performance dropping.
These problems often come from things like dirty filters, dull chains, or lack of maintenance.
Stay ahead of these issues by checking your chainsaw regularly and addressing small problems
before they grow!
Read 10 Common Problems With Fixes In Easy Ways…
1. Starting Issues
Having trouble starting your Husqvarna 120 Mark II chainsaw?
This is a common problem many users face, especially after long periods of inactivity.
Cause
Old or stale fuel, worn-out spark plugs, or a dirty air filter can prevent the engine from starting
properly.
Fixes
To resolve this, replace old fuel with fresh gasoline, clean or replace the spark plug, and check
the air filter for clogs.
Regular maintenance can help prevent starting difficulties and keep your chainsaw running
smoothly.
2. Poor Chain Tension
One common problem with the Husqvarna 120 Mark II is poor chain tension, which can affect its
performance and safety.
A loose chain might slip off during use, while an overly tight chain can cause extra wear and tear
on the motor.
Causes
This issue is often caused by improper adjustments, frequent use without regular checks, or a
worn-out chain.
Fixes
To fix this, regularly inspect the chain tension and adjust it according to the user manual. Make
sure the chain is snug but can still move freely.
If the chain is worn out, replace it immediately to keep your saw working smoothly and safely.
3. Reduced Cutting Power
If your Husqvarna 120 Mark II chainsaw is not cutting efficiently, it could be due to reduced
cutting power.
Causes:
- A dull or worn-out chain.
- Incorrect chain tension.
- Build-up of debris or sap on the chain.
Fixes:
- Sharpen the chain using a chain file or replace it if heavily worn.
- Adjust the chain tension according to the manufacturer’s guidelines.
- Clean the chain and bar to remove any debris or residue.
4. Overheating Motor
Is your Husqvarna 120 Mark II chainsaw overheating during use?
This is a common issue that can interrupt your work and damage the motor if not addressed
quickly.
Causes of Overheating
- Clogged Air Filters: Dirt and debris block airflow, causing the motor to overheat.
- Dull Chains: A dull chain forces the motor to work harder, generating excess heat.
- Low Lubrication: Lack of bar and chain oil increases friction, leading to overheating.
Fixes for Overheating
- Clean the Air Filters: Regularly inspect and clean the filters to ensure proper airflow.
- Sharpen the Chains: Keep the saw chain sharp to reduce motor strain.
- Check Lubrication: Always ensure the bar and chain oil level is adequate for smooth operation.
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5. Fuel Leakage
Fuel leakage is a common issue with the Husqvarna 120 Mark II chainsaw that can lead to
safety risks and wasted fuel.
Causes of Fuel Leakage
- Damaged or cracked fuel lines.
- Loose or improperly sealed fuel tank cap.
- Faulty carburetor causing leaks.
Fixes for Fuel Leakage
- Replace damaged fuel lines with new ones.
- Check and tighten the fuel tank cap securely.
- Inspect the carburetor and repair or replace it if needed.
6. Chain Slipping
One common issue with the Husqvarna 120 Mark II chainsaw is chain slipping.
Causes
Chain slipping can occur due to a loose tension adjustment, worn-out bar or sprocket, or
improper chain installation. Dirt buildup in the bar groove may also contribute to the problem.
Fixes
To fix chain slipping, start by checking the chain tension and adjusting it according to the user
manual.
Clean the bar groove to remove debris, and inspect the bar, sprocket, and chain for wear.
Replace any damaged parts to ensure the chain stays secure.
7. Excessive Vibration
Excessive vibration is a common issue with the Husqvarna 120 Mark II chainsaw.
This problem can make the tool uncomfortable to use and may lead to fatigue during extended
work sessions.
Causes of Excessive Vibration
- Loose or worn-out mounting screws.
- Damaged anti-vibration system.
- Misaligned or dull chain.
Fixes for Excessive Vibration
- Check and tighten all screws regularly.
- Inspect and replace worn-out anti-vibration mounts.
- Sharpen or properly align the chain to ensure smooth operation.
8. Dirty Air Filter
A dirty air filter is a common issue with the Husqvarna 120 Mark II chainsaw and can affect its
performance.
Cause
The air filter gets dirty over time, especially when the chainsaw is used in dusty or debris-filled
environments.
Fixes
Clean the air filter regularly using compressed air or soap and water if it’s washable.
If the filter is too damaged or clogged, replace it with a new one to keep your chainsaw running
smoothly.
A clean air filter ensures better airflow and prolongs the life of your Husqvarna 120 Mark II.
9. Spark Plug Failure
Spark plug failure is a common issue with the Husqvarna 120 Mark II chainsaw.
A faulty or dirty spark plug can cause starting problems, misfires, or poor engine performance,
which can be frustrating when you’re trying to get work done.
Causes of Spark Plug Failure
- Carbon deposits or dirt on the spark plug.
- Worn-out or damaged spark plug over time.
- Incorrect fuel mixture leading to residue buildup.
Fixes for Spark Plug Failure
- Remove and clean the spark plug using a wire brush or spark plug cleaner.
- Replace the spark plug if it’s too worn or damaged.
- Ensure you’re using the correct fuel mixture to prevent residue issues in the future.
10. Oil Pump Malfunction
An oil pump issue can cause your Husqvarna 120 Mark II to distribute oil unevenly, leading to
poor chain lubrication and reduced performance.
This problem often shows up as a dry or overheating chain, which can affect how smoothly your
chainsaw operates.
Cause
The most common causes of oil pump malfunctions include clogged oil lines, dirt buildup, or a
faulty pump mechanism.
Fixes
To fix this, clean the oil lines thoroughly and make sure they’re not blocked. If the problem
persists, inspect the pump for damage and replace it if necessary.
FAQs
What are the specifications of the Husqvarna 120 Mark II?
The Husqvarna 120 Mark II features a 38.2cc 2-stroke engine with a power output of 1.4 kW. It
is designed for light-duty cutting tasks, offering a lightweight body and excellent fuel efficiency
for home use.
What is the chain size for the Husqvarna 120 Mark II?
The Husqvarna 120 Mark II comes with a chain size of 16 inches, making it suitable for cutting
small to medium-sized logs efficiently.
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