The Causes And Solutions For Chainsaw Leaking Bar Oil in 2024

chainsaw leaking bar oil

Chainsaws have become vital tools for completing many tasks around the home and in professional settings. They’re powerful, reliable pieces of equipment that can be used to safely trim trees, cut through firewood, and perform DIY projects with ease. However, one common issue that most chainsaw owners run into is chainsaw leaking bar oil in tank. This issue can lead to inefficient performance from your chain saw as well as being an eyesore on work surfaces.

In this blog post, we will explore what causes chainsaw bar oil leakage and some of the possible solutions homeowners and professionals might use to solve the problem.

What are the Causes of a Leaking Chainsaw Bar Oil?

chainsaw leaking bar oil

These are the causes of a chainsaw leaking bar oil:

  • Exceeding the capacity of the oil tank
  • The guide bar exudes oil
  • Accumulation of oil leak in indentations
  • The formation of oil pump droplets
  • Engaging in running without pauses or breaks

Let’s find out each of these causes elaboratively and how you can solve them.

1. Exceeding the Capacity of the Oil Tank

If a tank is pushed too hard and filled beyond its capacity, it can create pressure that causes it to leak. This often occurs when too much sawdust accumulates in the housing or if high-viscosity oil is used. Additionally, damage to the neck seals surrounding the bar oil reservoir could ultimately lead to leakage. To avoid these problems, regular maintenance, such as cleaning out sawdust and checking seals, should be performed.

2. The Guide Bar is Exuding Oil

A leaking chainsaw bar oil can be caused by a variety of factors. Most commonly, it’s due to either improper lubrication or a worn guide bar. Improper lubrication involves using the wrong type of bar oil for your specific make and model or inadequate maintenance that causes air pockets in the system. Worn guide bars typically break down from extended use and age, resulting in cracks and an inability to properly contain the pressurized oil inside. If you notice that your chainsaw bar is exuding oil, it’s important to address the issue as soon as possible to minimize further damage to your chainsaw.

3. Accumulation of Oil in Indentations

A lack of lubrication and wear on the seals may result in the oil seeping through and causing leaks. In other cases, there may be aging, damage to the seals, or wear due to overuse which will lead to similar results. Furthermore, on some occasions, the accumulation of oil can occur in certain indentations on the chainsaw’s bar, which could then eventually cause leaks.

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4. The Formation of Oil Droplets 

One of the primary causes of leaking chainsaw bar oil is the formation of oil droplets. These droplets form due to a build-up of pressure within the saw’s chamber caused by oil residue and dirt, which can lead to leaks in various parts of the chainsaw, such as around its bar or via small holes. This kind of leakage is often caused by failing to clean and maintain the chainsaw regularly. If left untreated, this can cause serious damage to the machine over time, making regular maintenance essential to getting the most out of your chainsaw.

5. Engaging in Running Without Pauses or Breaks

Some of the most common reasons for bar oil leaks are improper use or minor damage caused by bumps and impacts. In addition, the chain brake can become blocked or frozen over time if it is not cleaned regularly, which may lead to bar oil leaking. However, one of the biggest reasons for bar oil leakage is when the user overfills the tank with bar oil. This can cause pressure build-up in the tank that forces excess fluid out through any small openings or abrasions in the system leading to leakage. Poor maintenance and improper storage can also contribute to a leaking chainsaw bar oil and engaging in continuous running without pauses or breaks.

Also Read: Does Electric Chainsaw Need Oil?

How Bar and Chain Oil Work?

Bar and chain oil is a must-have for a chain saw operator. It plays an important role in keeping chains working smoothly and safely. When oil is applied to the chain, it keeps the metal parts from corroding and lubricates the components of the chain saw so that they do not overheat or cause friction. Additionally, bar and chain oil helps prevent the build-up of dirt and debris, which can harm both the engine of a chain saw and its user. Bar and chain oil must be applied to a clean surface before use on a saw to ensure it functions properly and efficiently.

Understanding the Significance of Lubrication

Knowing the importance of lubrication can be an essential part of keeping vehicles and machines running smoothly. As most mechanisms tend to generate numerous amounts of friction with their regular use, certain parts end up wearing down quickly or can even break. Lubricated surfaces protect these components and help maintain the functionality of metals and other materials. Furthermore, lubrication has been proven to reduce operating costs and energy consumption, as well as provide safety tools for workers. All in all, understanding the value of having a properly lubricated system is key in sustaining a functional machine or vehicle.

Instructions for Proper Venting of Chainsaw Oil Tank

Properly venting a chainsaw oil tank is an important safety step that must not be overlooked. It is essential to ensure that the gasoline used in the chainsaw does not form a combustible vapor and causes hazardous conditions.

  •  To do so, use high-octane fuel in the chain saw the tank, as this reduces its likelihood of forming combustible vapors.
  • Next, equip your chainsaw with an intake valve between the oil tank and the engine for optimal venting.
  • Make sure to adjust it regularly to ensure effective venting of any combustible vapors.
  • Also, take note to only fill your tank with oil up until two-thirds full while leaving one-third of the space in the top open for proper ventilation of fumes.
  • Following these steps can help ensure that you exercise caution and stay safe while operating your chainsaw.
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Also Read: How to Oil a Chainsaw in 2024?

How to Stop Stihl Chainsaw Leaking Bar Oil?

Here are some bullet points to help you stop your Stihl chainsaw from leaking bar oil:

  • Check the oil reservoir for cracks or damage. If it’s damaged, you’ll need to replace it.
  • Drain the chainsaw of its bar oil and fuel mix before storing it to avoid oil leaks while in storage.
  • After use, it’s normal for chainsaws to leak some oil around the chain drive.
  • Damaged seals in the oil tank can also cause oil leaks. If this is the case, you’ll need to replace the seals.
  • To fix 90% of Stihl chainsaw bar oil leaks, try replacing the oil pump seal. This is a simple repair that can be done at home.


How do I keep my chainsaw from leaking bar oil?

Keeping your chainsaw from leaking bar oil is an important part of securing its longevity and performance. Ensuring that the bar oil is not overfilled and kept away from heat sources can help prevent oil leakage. It’s also crucial to frequently clean and inspect the rubber seals and gaskets, which can wear out over time, leading to a leaky chainsaw. Finally, if you use your chainsaw frequently or for tough jobs, it’s important to regularly change the bar oil in order to keep the unit working optimally and ensure that it doesn’t leak from overuse. Taking these few simple steps can save you from a lot of hassle down the line!

How do I know if my chainsaw is leaking too much oil?

If you notice smoke trailing when in use, that is a sure giveaway, similar to the smell of burning oil or feeling the heat on your ankle. However, a more reliable and accurate way to know is by going through routine maintenance checks, regularly inspecting the fuel lines for cracks or disconnected fittings as well as assessing if the base of your chainsaw where it meets the handle has enough protection from wood chips and other debris.

What happens if my chainsaw runs out of bar oil?

If your chainsaw runs out of bar oil while cutting, serious damage can result to the saw and the surrounding wood. The chainsaw contains several parts that all need lubrication in order to run properly. When the bar oil runs out, all of these components will start running without the proper amount of lubricant, which leads to extreme wear and tear on each part. Without bar oil, friction levels increase, resulting in further damage from heat and even sparks.

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How often does a chainsaw need bar oil?

Chainsaw bars require oil to properly lubricate the blade as it cuts through material, and to prevent the bar from wearing down over time. The recommended amount of bar oil depends on how often you’re using your chainsaw and the type of material you’re working with. For light use on softwood, it is recommended that the bar receives a new supply of oil every 6-8 hours; while heavy use on harder woods may require a fresh application every 2-3 hours.

How do you clean an oil leak?

Cleaning an oil leak is an important maintenance chore for any car owner. The best way to tackle this job is to first locate where the oil is leaking from. If it’s not clear, check the ground beneath your car for oil stains and slippery patches. Next, make sure you have necessary materials and tools like rags or paper towels handy to clean up the area and a leak-sealing product specifically designed for such purposes. Then, park your car on a level surface so that the spill doesn’t spread more than necessary and use caution while cleaning to avoid puncturing yourself on sharp metal.

What is the purpose of chainsaw oil?

Chainsaw oil is a critical component of any chainsaw, as it helps ensure the saw’s cutting system runs smoothly and effectively. The oil leaves a protective barrier within the engine, reducing friction and wear and tear on parts. It also helps to keep the chain and bar lubricated, thus improving performance when cutting through wood or other materials. Additionally, some viscosity improve detergents help prevent the buildup of residues in the engine compartments.

What is an alternative to bar oil?

Alternative choices to bar oil abound, and each has its advantages and disadvantages. Chain saw users, for instance, can substitute kerosene for bar oil to lubricate the chains without compromising performance or risking damage to the machine. Coconut oil is becoming popular for replacing petroleum-based chain saw oils and provides superior lubrication without the risk of clogging or residue buildup. Another viable option is a plant-based chain saw oil made from vegetable sources that don’t leave a film or residue on the inside surface of the guide bar, thereby allowing easy cleaning between chain sharpening sessions

How do you maintain a chainsaw bar?

Maintaining a chainsaw bar can seem like an arduous task, but it is essential for the safety and effectiveness of your chainsaw. There are several steps you can take to keep a chainsaw bar in good condition. First and foremost, be sure to use a suitable oil when lubricating the chain. You should also sharpen or replace the chain periodically; this ensures that the teeth are all at the same length and therefore cut efficiently.

Wrapping Up!

In summary, understanding the composition of a chainsaw’s bar oil as well as how leaks may occur, is essential for any chainsaw operator. By staying aware of the causes and possible solutions for leaking bar oil, you can ensure that your chainsaw runs at a top performance level and lasts for many years. Make sure to pay attention to your saw’s oil levels and storage conditions so you can act swiftly in the event of any leakage. Taking the proper precautions when modifying or repairing a chainsaw is also critical to avoid sucking air into the fuel lines, which can reduce engine efficiency significantly. Stay informed and alert, your chainsaw will thank you in the long run!

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