Using the proper fuel and oil mixture is crucial for getting optimal performance and longevity out of your Husqvarna chainsaw. The right gasoline and 2-stroke engine oil will provide proper lubrication, minimize wear and tear, and prevent common issues like difficult starts, poor acceleration, and loss of power. In this blog post, I’ll cover everything you need to know about choosing fuel and oil for your Husqvarna chainsaw.
Recommended Gasoline for Husqvarna Chainsaws
Husqvarna recommends using only fresh, clean, unleaded gasoline with a minimum octane rating of 89 in all of their chainsaws. Gasoline containing up to 10% ethanol (E10) is acceptable.
Higher octane gasoline is not necessarily better – just use a good quality 89+ octane unleaded fuel from a reputable gas station. Using old, contaminated, or oil-mixed gasoline can cause a variety of performance issues in your chainsaw.
Recommended Oil for Husqvarna Chainsaws
For proper lubrication, Husqvarna specifies use of their own brand of high-quality 2-stroke engine oil designed specifically for chainsaws. Husqvarna XP+, HP, or LS+ synthetic blend oils are FD-certified and meet ISO-L-EGD and JASO M345 specifications for use in air-cooled 2-stroke engines.
Using this oil ensures your Husqvarna chainsaw receives adequate lubrication to prevent premature wear while also keeping the engine clean. Generic or automotive oils can leave deposits that clog the carburetor and fuel system over time.
Fuel and Oil Mixture Ratio for Husqvarna Chainsaws
The correct gasoline to oil ratio is critically important for Husqvarna chainsaws. An improper mixture can lead to a variety of issues including piston and cylinder damage.
50:1 Fuel-to-Oil Ratio
All Husqvarna chainsaws up to and including 75cc models require a 50:1 fuel mixture. This equates to:
- 2.5 fluid ounces of Husqvarna 2-stroke oil per 1 gallon of fresh 89+ octane unleaded gasoline
- 5.28 fluid ounces (about 3/4 cup) oil per 5 gallons gasoline
Mixing at 50:1 provides the optimum balance of lubrication and minimum spark plug fouling. Never exceed the recommended oil amount.
Mixing Fuel and Oil
Properly mixing the gasoline and oil is crucial for performance and engine life. Here are some tips:
- Always start with fresh, clean gasoline and the correct measure of Husqvarna oil.
- Use a clean, approved fuel storage container and funnel.
- Shake the mixture vigorously before each use to disperse the oil evenly.
- Mix in small batches that will be used within 30-60 days to prevent degradation.
- Label all fuel mixtures with content and date to monitor freshness.
Mixing fuel for your chainsaw requires care and accuracy. Never guess at proportions or rush the process. Contaminated or improperly mixed fuel is a leading cause of hard starting, rough idle, loss of power, and potential engine damage over time.
Husqvarna Chainsaw Fuel and Oil Tips
Here are some additional tips related to fuel and oil for optimal performance from your Husqvarna chainsaw:
Using Suitable Unleaded Fuel
Always use fresh 89+ octane unleaded gasoline without oil mix for maximum engine life and performance. Old, stale gasoline can cause hard starting, poor acceleration, and loss of power. Ethanol blends above 10% can also harm seals, gaskets, and internal engine components over time.
Storing and Handling Fuel
Properly storing and handling fuel is just as important as mixing it correctly:
- Store mixed fuel out of direct sunlight in approved, labelled containers.
- Keep caps and lids sealed to prevent moisture contamination and evaporation.
- Check for water condensation in storage cans periodically.
- Never use fuel that has been stored for more than 2 months.
- Always shake or stir stored fuel before pouring into the chainsaw.
Following good fuel storage and handling practices prevents performance issues and potential engine damage from contaminated, degraded fuel over time.
Husqvarna Chainsaw Maintenance
Proper maintenance is crucial for optimal performance and trouble-free operation of your Husqvarna chainsaw. Here are some key areas to focus on:
Cleaning and Inspecting the Fuel System
Over time, residues can build up in the carburetor passages, fuel lines, and tank. Every few months:
- Remove and clean the air filter.
- Inspect the spark arrestor screen and muffler interior.
- Check the fuel filter and lines for blockages.
- Clean out the fuel tank with a non-flammable solvent.
Keeping the entire fuel delivery system clean prevents hard starting, stalling, and loss of power during cuts.
For storage over 30 days:
- Drain the fuel tank and run the engine dry.
- Fog the cylinder with storage oil through the spark plug hole.
- Clean the chainsaw thoroughly inside and out.
- Store in a clean, dry location away from direct sunlight and temperature extremes.
Proper storage prevents gummed up carburetors and corrosion inside the fuel tank and engine that can be difficult to reverse.
Husqvarna Chainsaw Troubleshooting
Many common chainsaw issues stem from fuel-related problems. Here are some tips for diagnosing and fixing them:
Common Fuel-related Issues
Difficulty starting, stalling during cuts, and loss of power are often caused by:
- Using old, contaminated, or improperly mixed fuel.
- A clogged fuel filter, vent, or supply line.
- An excessively rich or lean fuel mixture.
- Moisture in the fuel system.
- A faulty carburetor in need of adjustment or rebuilding.
Tips for Troubleshooting
If your chainsaw exhibits any fuel-related symptoms:
- Start by draining old fuel and replacing with fresh, properly mixed fuel.
- Check the fuel system components and lines for blockages.
- Inspect the spark plug – fouling or discoloration often indicates a rich mixture.
- Make carburetor adjustments per the manufacturer’s specifications.
- As a last resort, rebuild or replace the carburetor.
Taking methodical steps to diagnose and isolate fuel-related issues will get your Husqvarna chainsaw back up and running at peak performance.
Using the correct gasoline and 2-stroke oil mixtures is absolutely essential for Husqvarna chainsaw trouble-free operation and longevity. Always mix fuel at the recommended 50:1 ratio with 89+ octane unleaded gasoline and Husqvarna brand synthetic oil. Store fuel properly and maintain the chainsaw’s fuel delivery components. Diagnose and correct any fuel-related issues promptly to restore peak performance. Follow these tips and your Husqvarna chainsaw will provide reliable service for years to come.
Frequently Asked Questions
Can I use a different brand of two-stroke oil in my Husqvarna chainsaw?
Husqvarna recommends using only their formulated XP, HP, or LS synthetic 2-stroke oils designed specifically for chainsaw engines. Other brands may not provide adequate lubrication or contain detergents that can leave engine-damaging deposits over time. For best performance and protection, stick with Husqvarna brand oil.
What happens if I use the wrong fuel-to-oil ratio in my chainsaw?
Using an improper fuel mixture can severely damage your chainsaw. Too much oil (ratios below 50:1) can fouling the plug and lead to excessive carbon build up. Too little oil (ratios over 50:1) increases friction and can quickly lead to piston scuffing and cylinder scoring once lubrication runs out. Always mix fuel at the specified 50:1 ratio.
Can I use ethanol-free gasoline in my Husqvarna chainsaw?
Yes, Husqvarna allows the use of ethanol-free gasoline (ethanol content under 10%) in their chainsaws. Ethanol-free fuel has a longer shelf life and prevents gumming in the carburetor and corrosion within the fuel system components. Just ensure the octane rating meets the 89+ minimum specification.
How often should I clean and inspect the fuel system of my chainsaw?
A good rule of thumb is to thoroughly inspect and clean the air filter, carburetor jets, fuel lines, tank, and spark arrestor every 3 months or so to remove buildup of deposits. Do this more frequently if you notice any loss of power during use. Preventive fuel system maintenance is key for peak performance.
What are the signs of a fuel-related issue in my chainsaw?
Hard starting, stalling during cuts, sputtering acceleration, reduced power, excessive smoking, and fouled spark plugs typically indicate a fuel system problem. The most common causes are contaminated/old gasoline, clogged filters/lines, incorrect fuel mixture, and carburetor issues. Diagnosing and fixing fuel issues promptly is key to restoring optimal performance.
Michael Boyle is the founder and main author of Chainsaws Finder, boasting over 20 years of experience in the chainsaw industry. Hailing from Texas, Michael combines his extensive knowledge and hands-on expertise to provide reliable advice and top-notch service. His vision is to empower chainsaw users to tackle any project with confidence, making Chainsaws Finder a trusted resource in the field.