Husqvarna Chainsaw Fuel Mix: (Ratio, Tips and Benefits)

A few weeks ago, I noticed my Husqvarna chainsaw was no longer performing as it had in the past. There were also more emissions coming from it than before.

I checked the air filter immediately, and it was in great shape. That is when I decided to try adjusting the fuel mix ratio.

And to my surprise, the saw soon began to perform flawlessly and emit fewer emissions after correctly mixing the fuel.

Husqvarna chainsaws require a fuel mix ratio of 50:1 (2%) when running 75cc engines, while a 33:1 (3%) ratio may apply to engines over 75cc.

Advantage of two stroke on husqvarna gas powered chain saw

I will first introduce the fuel mix ratio in the article. Next, I will describe the right ratios for Husky saws as well as explain how to apply them.

Let’s dive right in!

What Does Fuel Mix Ratio Mean In Chainsaws?

In case you didn’t know, the fuel mix ratio refers to the proportion of gasoline to the oil used in a saw. It specifies the amount of oil that should be added to gasoline to create the correct mixture for the engine.

Advantage of two stroke on husqvarna gas powered chain saw

Two-stroke engines, like the ones in your chainsaw, use oil and gasoline to lubricate and cool the machine during operation. Both of them are equally crucial, as gasoline revs up the motor, while the oil provides lubrication.

Remember that too much oil or gasoline can damage or malfunction the chainsaw. Hence, you should always adhere to the manufacturer’s recommended ratio.

What’s The Correct Fuel Mix Ratio For Husqvarna Chainsaws?

Advantage of two stroke on husqvarna gas powered chain saw

As per Husqvarna guidelines, the fuel/oil ratio should be 50:1 for all Husqvarna products powered by 75cc or larger engines. Here is an example for further clarification:

According to the 50:1 fuel mix ratio, for every 50 parts of gasoline, 1 part of oil should be added.

Having said that, some chainsaws have much more power than 75cc. If you have one built for heavy-duty cutting tasks, it may run way better with a 33:1 mix.

Let’s talk a little bit more about these two ratios.

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  • 50:1 Ratio

Advantage of two stroke on husqvarna gas powered chain saw

The 50:1 (2%) ratio is suitable for chainsaws with at least 75cc of power. However, this is only applicable if you choose Husqvarna two-stroke oil.

The Husqvarna concrete saw fuel mix ratio also stands at 50:1. Several Husqvarna chainsaw models can be used with the 50:1 ratio, including the 240, 365, 439, 450, 455, 460, 545, and 555.

Here is a chart for those who wish to use the 50:1 ratio:

  • 33:1 Ratio

Advantage of two stroke on husqvarna gas powered chain saw

I know some loggers won’t use the oil mentioned above because of the air-cooled and two-stroke engines on their chainsaws. They may favor JASO FB or ISO EGB more.

For them, the 33:1 (3%) ratio is perfect.

Let’s look at the chart explaining how much oil and fuel should be blended for a perfect 33:1 mix.

  • Other Fuel Mix Ratios

Advantage of two stroke on husqvarna gas powered chain saw

As far as Husqvarna chainsaws are concerned, the fuel ratios mentioned previously are undoubtedly the most effective.

However, you can also use other ratios depending on your application. Let’s see them.

Things You Need To Do Before Mixing Fuel

Fuel mixing is vital both for preventing contamination and ensuring its efficiency.

Nevertheless, if you focus solely on fuel mixing, chances are contamination will still occur. It is because a variety of factors affect fuel quality. Here are some of them.

Advantage of two stroke on husqvarna gas powered chain saw

  • Proper Storage Of Fuel

Many people do not realize that dirty fuel tanks can severely damage fuel quality.

Unfortunately, a lot of folks are using old, filthy containers. Instead of using such items, you should rely on a good jerry can.

Moreover, if you want the absolute best that won’t harm your fuel at all, consider using the Husky Combi Can. It has a tool storage compartment and no spill valves, which are both extremely useful.

And for those of you who use two-stroke chainsaws, a dedicated tank is also available.

  • Using Suitable Unleaded Fuel

Advantage of two stroke on husqvarna gas powered chain saw

There are times when the fuel mix does not produce the results expected. Using the wrong fuel is to blame for this.

Remember that Husqvarna chainsaws cannot run on any fuel. There are some specific types of fuel that will make your saw perform optimally. Let’s check them out in the chart below.

  • Using Suitable Oil

Advantage of two stroke on husqvarna gas powered chain saw

Okay, I’m done with the fuel and storage of it. Nevertheless, there is another important factor that you must take into consideration. Yes, you guessed it right, it’s oil.

Husky saws, unfortunately, cannot operate on any type of oil mix. Let me show you which ones are the most effective.

  1. LS+ Two Stroke Oil

If you use your chainsaw in a densely populated area, go for LS+ oil. It combines mineral oil with synthetic oil to reduce emissions to a minimum. Here are some more features of it:

  • Protects against lean and carbon piston seizures
  • Longer engine life due to cooler engine temperatures

In some cases, LS+ oils are formulated specifically for water-cooled engines. Using them on non-water-cooled engines is not advisable as this may severely damage the saw.

  1. Husqvarna HP Oil

I do not consider LS+ to be a bad oil. If anything, it is an excellent oil. Nonetheless, it poses many compatibility issues since the oil is two-stroke.

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This is where the HP (high-performance) oil stands out. It hardly has any restrictions, and you can pretty much use it with any fuel, even regular unleaded fuel. Let’s see what else it offers:

  • Reduces piston, exhaust port, and crankcase coating
  • Can handle low-quality fuels well
  • The engine will be more efficient thanks to the synthetic oil

How Do I Mix Husqvarna Chainsaw Fuel?

Here is a step-by-step guide on how to mix fuel in your Husqvarna chainsaw. Prior to starting, gather the following items:

  • Your Husky saw (it should be turned off and cooled)
  • Unleaded fuel
  • Oil for Husqvarna’s two-stroke engines
  • Cloth for wiping up spills
  • A clean container used to store fuel
Advantage of two stroke on husqvarna gas powered chain saw

STEP – 1: Ensure sufficient ventilation

Organize all the materials needed for the project. Before proceeding with the main task, be sure that the area you are in has adequate ventilation.

STEP – 2: Add unleaded fuel

Add half of the unleaded gasoline to the container. And when I said container, I meant the separate empty container, not the fuel tank.

Next, pour in all of the oil that is needed for your 50:1 mix. (2.6 oz. oil/1 gallon gas)

STEP – 3: Add oil

In order to obtain a 50:1 mix, add the correct amount of oil. For example, if there is a gallon of fuel, it would require 2.6 ounces of oil.

STEP – 4: Shake the mixture

Despite the fact that combining two fluids is the key, many forget to do so. Ensure a thorough mix by shaking the container.

Shaking for 10-15 seconds is sufficient.

STEP – 5: Add the remaining fuel

Now it is time for the remainder of the gasoline to be poured in. Afterwards, you need to shake for another 10-15 seconds.

STEP – 6: Put the mixture in the tank

Take the fuel cap off the tank. You are now ready to put the freshly mixed oil and fuel on your chainsaw.

Be careful not to overload the tank. For optimal results, fill it up approximately 80%.

STEP – 7: Get spills cleaned up

Reattach the cap and tighten it securely. If there are spills, make sure they are cleaned up right away.

STEP – 8: Turn on the saw safely

I know you are probably itching to start the chainsaw so you can see the performance, but I’d like to stop you.

First, distance yourself from the mixing zone by ten feet or more. Afterward, you can safely start the saw and do some cutting of firewood.

Tips For Proper Fuel Mixing

I have gathered some tips that will help you avoid fuel mix mistakes. Let’s check them out.

Advantage of two stroke on husqvarna gas powered chain saw

  1. Store your fuel mixture properly

Keep the fuel container sealed and stored in a cool, dry place. It cannot be exposed to direct sunlight or heat sources in order to prevent evaporation.

Moreover, don’t store mixed two-stroke fuel for longer than a month.

  1. Apply a fuel stabilizer

Having experienced this myself, I know fuel mixes must sometimes be stored for a long time. In that case, you can use a fuel stabilizer to prolong the shelf life.

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Adding it to your two-stroke fuel mix is all it takes.

  1. Mix the fuel and oil thoroughly

To ensure an even distribution of oil in the fuel, combine the oil and fuel in a clean container and shake well before using.

  1. Make use of a measuring instrument

I have witnessed a number of people messing up the ratio even though they knew it. To prevent such problems, consider using a measuring cup or syringe.

  1. Choose the right oil

Not every oil is created equal. Instead of using cheap, low-quality oils, go for the ones I listed above in order to ensure optimal performance for your Husqvarna saw.

  1. Make sure the container is airtight

When I suggest using a container, I always mean an airtight container designed for fuel storage. Besides preserving your fuel mix, it also prevents spills, permeation, and evaporation.

Advantages of Proper Fuel Mix Ratio In Husky Chainsaws

Let’s have a look at the benefits you can expect from a good fuel mix ratio.

Advantage of two stroke on husqvarna gas powered chain saw

  1. Improved Performance

A balanced fuel mix ratio ensures that the engine is adequately lubricated, thereby reducing wear and tear. This leads to enhanced performance, including easier starting and smoother operation.

With the right fuel mixture, your Husky saw will also be able to cut better and more efficiently.

  1. Reduced Emissions

You may not recall, but I mentioned previously that LS+ oil lowers emissions significantly. So if you succeed in getting the ratio right, the power tool won’t emit much pollution.

This not only helps the environment but also protects you from harmful gas emissions.

  1. Preventing Engine Seizure

Cylinder-piston failure causes chainsaw engines to seize. And what has a direct impact on the piston? Yes, it’s the fuel mixture.

Therefore, if you maintain a good fuel mix, you can prevent engine seizures, which can cause severe damage.

What If Husqvarna Chainsaws Have An Incorrect Fuel Mix Ratio?

The following are the biggest disadvantages of a poor fuel mix.

Advantage of two stroke on husqvarna gas powered chain saw

  1. Wear and Friction

An incorrect fuel mix ratio can cause the internal parts to wear down more quickly or experience more friction. Consequently, these parts may be damaged or fail, requiring expensive repairs.

  1. Overheating

When your saw is overheating, you likely don’t attribute it to the fuel mix. However, a bad fuel mix can produce excessive heat in the chainsaw engine; a fact few people are aware of.

  1. Engine Damage

Engine damage is the most serious consequence of a poor fuel mix ratio.

You see, oil is added to the mixture to lubricate the engine’s internal components. Nevertheless, if there is not enough oil, these items will wear out sooner or seize up.

This way, severe damage to the engine can occur.

Frequently Asked Questions

Also Read: Difference Between Husqvarna 440 and 440e

To Sum Up

Hopefully, the article has answered all of your questions about the Husqvarna chainsaw fuel mix ratio.

As I stated earlier, the ideal ratio for Husky units is likely to be 50:1. However, for a few saws, the ratio may shift to 33:1.

Regardless of the fuel mix ratio you select, follow all the instructions carefully to maximize efficiency.

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About the Author: Tung Chi