Sylvie Willis
Trimmers are a type of small engine that uses fuel lines to carry fuel from the tank to the carburetor. Over time, the fuel line on a trimmer can become hard and brittle, eventually cracking and leaking. This is a very common issue with trimmers, and the repair process can be tricky, requiring many steps to disassemble the trimmer's fuel system. The smaller fuel line on a trimmer is used to supply fuel from the tank to the carburetor, and it is important to ensure that it is properly sealed to prevent leaks.
Characteristics and Values of the Smaller Fuel Line on Trimmers
| Characteristics | Values |
|---|---|
| Frequency of replacement | Very common |
| Reasons for replacement | Fuel lines break down, become brittle, and crack over time |
| Tools required | Hemostat forceps, long needle-nose pliers, or forceps |
| Fuel line size | 1/8" i.d x 1/4" o.d or 3/32" i.d x 3/16" o.d |
| Fuel type | Gas |
| Fuel mix | Gasoline and two-cycle engine oil |
| Fuel tank location | Rear of the engine |
| Fuel filter location | Inside the gas tank |
| Fuel line colour | Black |
| Fuel line shape | Round |
| Fuel line material | Plastic |
| Fuel line kit | Available from most manufacturers |
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What You'll Learn
Fuel line replacement
There are a few ways to replace a trimmer fuel line. Firstly, it is important to check the lines for any clogs and clear them, and then replace any damaged fuel lines with manufacturer-approved replacements. Lines can be sourced from online retailers such as Amazon, Walmart, and specialist small engine shops or parts houses.
To replace the line, first, tip the trimmer and shake out any fuel line pieces from the tank. Pull the fuel lines from the tank, and cut the ends of the new lines at an angle to make them easier to thread. Force the new lines into the holes in the tank, using pliers if necessary. Push the larger vent line about an inch into the tank, and the smaller fuel supply line in far enough so that the fuel filter will lay on the bottom of the tank. If the lines are tight, a small amount of oil can be applied to the outside of the line.
Finally, cut the end of the smaller line square, install the fuel filter, and drop it into the tank. Reattach the spark plug wire to the spark plug, and fill the tank with the fuel mix.
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Trimmer won't start
If your trimmer won't start, there are a few things you can try. Firstly, check that there is fuel in the tank. If there is fuel, it could be that the carburetor is clogged. Remove the air filter and spray carburetor cleaner into the intake. Let it sit for a few minutes, then replace the filter and try starting the trimmer again.
If your trimmer has been in storage over the winter, it's possible that the gasoline has broken down and caused varnish, gums, and other debris to form inside the carburetor, blocking the tiny fuel passages. In this case, you will need to disassemble the carburetor and give it a thorough cleaning.
Another possible issue could be the spark-arrestor screen. If this screen becomes plugged with carbon deposits, it can prevent exhaust-gas flow and lead to power loss. Remove the screen and spray it with a heavy-duty cleaner to soften the deposits, then clean it with an abrasive pad and reinstall. If the screen is excessively plugged, you may need to replace it.
If your trimmer is battery-powered, make sure the trimmer head is on properly and that the battery is fully charged and seated correctly inside the tool. If this doesn't work, try the battery in another compatible tool or try a different battery in your trimmer to determine whether the issue is with the tool or the battery.
Finally, if your trimmer has a cord, it may be getting stuck. Try pulling it 10-15 times with no choke and full throttle to see if that resolves the issue. If not, wait a few hours and try again.
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Clearing clogs
- Tip the trimmer and shake it to remove any fuel line pieces from the tank.
- Disconnect the spark plug wire from the spark plug.
- In a well-ventilated area, remove the fuel cap and empty the fuel tank into an approved storage container.
- Remove the fuel system cover, which is usually located on the rear of the engine. You may need to remove fasteners to access the carburetor.
- Release the throttle cable from the carburetor.
- Remove the entire fuel assembly, including the fuel tank, carburetor plate, and carburetor.
- Inspect and diagram the fuel line setup before continuing. Take note of any clogs or damage.
- Remove the fuel filter from the fuel tank using needle-nosed pliers or a straightened wire hanger.
- Clear any clogs from the fuel lines. Use a small piece of wire to thread through the lines if necessary.
- If the fuel lines are damaged or cracked, replace them with manufacturer-approved parts.
- Reassemble the fuel system, ensuring the fuel lines are properly connected to the carburetor.
- Refill the fuel tank and check for leaks.
It's important to follow safety precautions when working with fuel and power tools. Always work in a well-ventilated area and wear appropriate safety gear, such as gloves and eye protection. Additionally, keep a fire extinguisher nearby in case of any accidents.
Some trimmers may have slightly different fuel systems, so it's recommended to refer to your trimmer's manual or seek assistance from a qualified technician if you're unsure about any steps.
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Fuel line kits
When replacing a fuel line, it is important to follow the correct safety procedures and instructions. The repair process may involve a surprising amount of disassembly, and it is important to use the proper tools and safety equipment. It is also crucial to ensure that the replacement fuel line is compatible with the specific model of the trimmer.
To replace a fuel line, first tip the trimmer and shake any fuel line pieces out of the tank. Cut the ends of the new fuel lines at an angle to make them easier to thread into the tank. Force the cut ends of the lines into the proper holes, using needle-nose pliers if necessary. Push the larger vent line about an inch into the tank, and then push the smaller fuel supply line into the tank, ensuring that the fuel filter lays on the bottom. If the lines are tight, applying a small amount of oil to the outside of the line can help. Finally, cut the end of the smaller line square, install the fuel filter, and drop it into the tank.
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Fuel line cracks
To fix a cracked fuel line, you will need to replace it. This process can be done in a few steps, but it may vary slightly depending on the make and model of your trimmer. Firstly, remove the fuel system cover, usually located at the rear of the engine. Disconnect the spark plug wire and, in a well-ventilated area, remove the fuel cap and empty the tank. You will then need to remove the fuel filter, which is a small white cylinder attached to the end of the fuel line. It is recommended to make a diagram or take a picture of the fuel line setup before removing it to ensure a smooth repair process.
Once you have removed the old fuel line, you can install the new one. Cut the ends of the new fuel line at an angle to make it easier to thread into the tank. Push the larger vent line about an inch into the tank, and then push the smaller fuel line in, ensuring the fuel filter rests at the bottom of the tank. If the line is too tight, you can apply a small amount of oil to the outside. Finally, attach the fuel filter to the smaller fuel line, and you can then reconnect the fuel lines to the carburetor.
It is important to note that this is a general guide, and specific steps may vary depending on the trimmer model. Always refer to the manufacturer's instructions or seek professional assistance if you are unsure about any part of the repair process.
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Frequently asked questions
The smaller fuel line on a trimmer is the fuel supply line. It is pushed into the tank so that the fuel filter will lay on the bottom of the tank.
If your trimmer's engine won't start even though there is fuel in the tank, the fuel line may be cracked or clogged. Check the line and replace it if necessary.
Fuel lines should be replaced every few seasons as they deteriorate over time and can become brittle and cracked.
To replace your trimmer's fuel line, first remove the fuel system cover and disconnect the spark plug wire from the spark plug. Then, remove the fuel assembly from the trimmer and inspect the fuel line setup. Next, cut the ends of the new fuel lines at an angle and force them into the proper holes in the tank. Finally, attach the fuel filter to the smaller fuel line and fill the tank with fuel.
You can buy a replacement fuel line online or at a small engine shop or parts house. Many manufacturers offer a kit that includes both the small and large fuel lines.
