Sylvie Willis
Chainsaw fuel lines are an important component of the chainsaw's fuel system, allowing fuel to travel from the tank to the engine or carburetor. There are two types of fuel lines in a standard chainsaw: the main fuel line and the return fuel line. The main fuel line is typically made of a flexible rubber material, while the return fuel line is often made of clear PVC, which is inexpensive and suitable for low-pressure applications. When replacing fuel lines, it is crucial to use the correct type of fuel line for your specific chainsaw model to ensure optimal performance and prevent damage. Some popular options for fuel lines include Tygon, Stihl, and OEM lines, but it is important to be cautious of knock-offs and ensure they are EPA-compliant and ethanol-resistant.
Chainsaw Fuel Lines
| Characteristics | Values |
|---|---|
| Types of Fuel Lines | Clear PVC fuel line, rubber fuel line |
| Fuel Line Maintenance | Remove the old fuel line by detaching it from the carburetor and air filter, cut the new fuel line to the appropriate length, attach one end of the new fuel line to the carburetor and the other end to the fuel tank, check for leaks |
| Fuel Line Replacement Tools | Hemostat pliers, needle nose pliers, wire attached to a key ring |
| Fuel Line Brands | Stihl, Husqvarna, Tygon, Dolmar |
| Fuel Line Considerations | Compatibility with chainsaw model, resistance to gasoline and ethanol, EPA compliance |
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What You'll Learn
The best fuel line for chainsaws
When it comes to choosing the best fuel line for your chainsaw, there are several options available in the market. The most commonly mentioned one is the Tygon fuel line, which is popular for its resistance to failure and is great for homeowner saws with inexpensive, clear or yellow fuel lines. However, it is important to distinguish between the original Tygon and its knock-offs, which are stiff and likely to break down within a season. The original Tygon is soft, translucent, hazy yellow, and priced at around $1 per foot.
Another option is the Stihl R5 line, which is recommended for unmolded fuel lines. It is also available in bulk and is said to be less prone to kinking than other options. Additionally, there is the Echo/Shindaiwa black line, which is considered superior to Tygon by some users. It is recommended for impulse lines and is available in 6mm, making it suitable for a range of applications.
For those seeking an ethanol-resistant option, the Oregon ethanol line is a good choice. It resembles the yellow Tygon but is reportedly very different and designed for use without OEM. If you're looking for a flexible tubing option formulated for lawn equipment, you can find translucent yellow or blue tubing at hardware stores like Home Depot, Lowes, Ace Hardware, and Tractor Supply Company.
Lastly, some users have mentioned the use of Teflon-lined Tygon/PVC tubing, which is pricier but offers excellent durability, especially when working with nasty chemicals. However, it can be challenging to install due to the Teflon bunching up during the installation process.
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How to replace a fuel line
The fuel line on a chainsaw can become brittle, clog, crimp or crack over time. If the engine won't start even though there's fuel in the chainsaw, the fuel line may need replacing. Chainsaw fuel lines that carry fuel from the tank to the carburettor can be replaced using the following steps:
Firstly, wear work gloves to protect your hands and ensure you are working in a well-ventilated area. Remove the fuel cap and empty the fuel tank into an approved storage container. Using an Allen wrench, remove the screws that hold the cylinder shield to the engine. Lift off the shield.
Next, remove the 2 mounting nuts that secure the carburettor to the engine using a 7/16-inch socket driver. Pull the air filter housing off the carburettor and then pull the carburettor from the engine block, sliding it along the mounting studs. Be careful not to bend the throttle linkage or damage the gas lines.
Now, pull the fuel lines out of the gas tank. You can use needle-nose pliers to do this, but be careful not to damage the tip of the fuel line. If you are having trouble getting the lines through the holes in the fuel tank, try using hemostat pliers, which are perfect for getting into small spaces. You could also try cutting the end of the line to a sharp/long point, which will make it easier to thread through the hole.
Finally, reattach the spark plug wire and position the air filter in the housing. Reinstall the cylinder shield on the chainsaw and refill the fuel tank.
Some additional tips for installing fuel lines include:
- Using a product like Stihl PressFit to make the line pliable and easier to install
- Using a ballpoint pen spring or something similar to twist the fuel line into place
- Using a piece of wire to guide the fuel line into place
- Using WD-40 to lube the new line
- Using a set of 45-degree bent needle nose pliers to reach the fuel line
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Fuel line maintenance
Fuel lines are an essential component of a chainsaw, delivering fuel from the tank to the engine. Over time, they can become loose, dilated, or disintegrated, leading to fuel leaks and engine performance issues. Here are some tips for fuel line maintenance in chainsaws:
Selecting the Right Fuel Line
When choosing a replacement fuel line, it is important to select one that is compatible with your chainsaw model. Pro-grade saws typically use rubber fuel lines specifically shaped for a particular model. For homeowner saws, Tygon fuel lines are a popular choice due to their low price, flexibility, and resistance to failure. However, be wary of Tygon knock-offs, which tend to be stiff and may break down quickly. Opt for soft, translucent, hazy yellow Tygon, which is often more reliable. Additionally, consider the inner diameter of the fuel line; a smaller inner diameter may be necessary if you experience issues with fuel flow or leakage.
Preventing and Addressing Leaks
Ensure that your fuel lines are always snugly fitted to the nipple on which they are installed. A loose fuel line can lead to leaks and impact engine performance. If you notice any loosening or dilation of the fuel line, it may be due to the type of fuel used. Ethanol-based fuels, for example, can cause swelling in certain types of fuel lines. Consider using an ethanol-free blend or exploring ethanol-resistant fuel lines, such as those found in dirt bikes or other motor vehicles. Additionally, inspect the fuel tank and lines regularly for any signs of cracks, damage, or debris that could contribute to leaks.
Replacing Fuel Lines
If your fuel lines are damaged or disintegrated, replacing them is necessary. Start by removing the old lines and cleaning the area thoroughly. When installing the new fuel lines, take precise measurements and ensure you have the correct size and length. You may need to trim the lines to fit, and a sharp tool, such as a screwdriver, can help guide the line through the holes. Pliers, especially hemostat pliers, can be useful for pulling the lines through and securing them tightly. If the lines are particularly difficult to work with, consider placing them in boiling water to make them more pliable.
Routine Maintenance
Regular maintenance of your chainsaw's fuel lines is essential to prevent issues and prolong their lifespan. Keep your chainsaw well-maintained by regularly inspecting and cleaning the fuel tank, fuel lines, and other components. Additionally, ensure that your chainsaw chain is always sharp, as this can help improve fuel efficiency and reduce waste.
By following these maintenance tips and selecting suitable fuel lines, you can help ensure the reliable operation of your chainsaw and minimize the risk of fuel-related issues.
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Fuel line safety precautions
When it comes to fuel lines for chainsaws, there are a few options available, such as rubber fuel lines specifically shaped for a particular saw, or Tygon, a soft, translucent, hazy yellow tubing that is 10x more resistant to failure and costs about $1/foot. However, it is important to note that there are many Tygon knock-offs that are stiff and likely to break down quickly. Additionally, while polyurethane tubing has great gas resistance, it has poor ethanol resistance.
Now, let's discuss fuel line safety precautions for chainsaws:
- Turn off the chainsaw and allow it to cool down before refueling: Always make sure the chainsaw is turned off and has cooled down before attempting to refuel. This reduces the risk of accidental ignition and potential injuries.
- Keep the area clear of flammable materials and ensure proper ventilation: Remove any flammable materials from the refueling area and ensure there is adequate ventilation to prevent the buildup of fumes.
- Avoid open flames or ignition sources: Keep open flames or ignition sources away from the refueling area to prevent fire hazards. Even a small spark can lead to a dangerous situation.
- Ground the chainsaw: Properly ground the chainsaw to avoid static electricity buildup during fueling. This helps reduce the risk of sparks igniting flammable fumes.
- Inspect the fuel tank and lines for leaks or damage: Before starting the chainsaw, thoroughly inspect the fuel tank and lines for any signs of leaks or damage. A leaking fuel tank or damaged lines can lead to accidents or improper fuel flow.
- Wear appropriate Personal Protective Equipment (PPE): It is crucial to wear suitable PPE when working with a chainsaw to reduce the risk of injuries. Recommended PPE includes sturdy gloves, safety glasses or goggles, and protective clothing such as long-sleeved shirts and durable pants.
- Use the correct type of fuel: Always use the type of fuel recommended by the manufacturer. Do not mix gasoline with oil directly in the chainsaw's tank.
- Follow manufacturer's instructions and safety guidelines: Refer to the manufacturer's instructions for safe operation and maintenance of the chainsaw. This includes information on proper fueling procedures and safety precautions specific to your chainsaw model.
- Prevent kickback: Kickback occurs when the teeth of the chain catch on an object, forcing the blade back towards the operator. Always know the location of the bar tip and ensure it does not touch logs, branches, or the ground while the saw is running.
- Maintain concentration and a secure grip: Do not operate the chainsaw if you are feeling fatigued, as your concentration and grip may not be optimal, increasing the risk of accidents.
By following these fuel line safety precautions, you can help ensure a safer experience when working with chainsaws.
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Fuel line lifespan
The lifespan of a chainsaw's fuel line depends on usage, fuel quality, and exposure to the elements. Generally, a clear yellow fuel line lasts about 1-2 years, but it should be inspected regularly for signs of wear, cracking, or discoloration and replaced if necessary. Genuine Tygon fuel lines can last for years if the equipment is maintained and used properly. Amazon reviews of cheap fuel lines show that some buyers only get a year out of their installation.
It is important to replace a damaged fuel line promptly as a cracked or broken fuel line can lead to fuel leaks, air bubbles, or fuel starvation, all of which can prevent the engine from starting or cause it to run poorly. The correct size of the fuel line is also important. If the lines go on pretty easily when they are new, it is likely that they are the wrong size, which will be evident after the lines have been exposed to gas and can be put on and off without any resistance.
Fuel lines in motor vehicles are typically larger and more rigid than those used in chainsaws. Because of vibration and the weighted fuel filter, a flexible fuel line is preferred for chainsaws. Tygon is a popular choice for fuel lines in homeowner saws as it is inexpensive, clear or yellow, and 10x more resistant to failure. However, there are many Tygon knock-offs that are stiff and likely to break down in less than a season. True Tygon will be soft, translucent, hazy yellow, and costs about $1/foot.
To extend the lifespan of a chainsaw's fuel line, it is important to keep the chain sharp and the saw maintained. Additionally, the fuel line should always feel snug to the nipple on which it is installed. If the fuel line feels loose, it may be due to residual ethanol fuel in the tank. In this case, switching to an ethanol-free fuel blend may help.
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Frequently asked questions
The best fuel line for a chainsaw depends on the model of the chainsaw. The most common types of fuel lines are rubber and clear PVC. Rubber fuel lines are typically used for pro-grade saws and are specifically shaped for a particular model. Clear PVC fuel lines are inexpensive and suitable for low-pressure applications. Some other options for fuel lines are Tygon, Stihl, and Husqvarna.
To replace your chainsaw's fuel line, first, remove the old fuel line by taking off the air filter cover and air filter. Then, locate the fuel lines attached to the carburetor and disconnect them. Cut the new fuel line to the appropriate length, attach one end to the carburetor, and thread the other end through the fuel tank. Finally, reassemble the chainsaw and check for any leaks.
To replace a fuel line, you may need hemostat pliers, a sharp knife or scissors, and a thin piece of wire.
Yes, there are ethanol-resistant fuel lines available, such as the Tygon F-4040-A. However, it is important to carefully read the product descriptions and specifications to ensure that the fuel line is indeed ethanol-resistant and EPA-compliant.
