Replacing Husqvarna 125B's Fuel Line: Step-By-Step Guide

If you're looking to replace the fuel line on your Husqvarna 125B leaf blower, you can purchase a fuel line repair kit from Amazon or the Husqvarna website. The kit comes with a fuel line, fuel filter, primer bulb, and grommet. It's important to ensure that the fuel lines are connected correctly, with the tank pickup line (usually the one with the filter) going to the bottom connection on the carburettor, and the line from the top of the carburettor connecting to the short hose barb on the bulb. The fuel line from the long barb on the primer bulb then returns to the tank.

Check the fuel lines are connected correctly

To check that the fuel lines are connected correctly, follow these steps:

Firstly, the red line should go from the large-diameter hose of the fuel tank directly towards the longer nipple of the fuel primer bulb.

Secondly, the blue fuel filter line starts from the smaller-diameter hose of the fuel tank and routes directly towards the small nipple of the carburettor.

Thirdly, the green line goes from the short nipple of the fuel bulb primer towards the large nipple of the carburettor.

The engine will have two connections that use metal fuel lines, and these will be separate at the top and bottom. The primer bulb has two connections on the backside, which look plastic, and one is bigger than the other.

If you are still having issues, there are a few things to check:

• Add fuel to the spark plug hole and try turning the engine.
• Check the spark is good.
• Check for a gummed-up carburettor.
• Check the fuel lines are not reversed.

Check the fuel lines are not reversed

Reversed fuel lines are a common issue with the Husqvarna 125B leaf blower. The fuel lines could be reversed if the primer bulb does not fill with fuel when you pump it.

To check if your fuel lines are reversed, first, identify the tank pickup line. This is the line that includes a filter and usually has a blue fuel filter line. Then, check that the pickup line is connected to the bottom connection on the carburettor. Next, check that the line from the top of the carburettor is connected to the short hose barb on the primer bulb. Finally, verify that the long hose barb line on the primer bulb is connected to the tank.

If your fuel lines are reversed, simply swap the connections at the primer bulb so that the short line is connected to the front and the long line is connected to the carburettor.

Step 1: Identify the Tank Pickup Line

The tank pickup line is the line that includes a filter and usually has a blue fuel filter. This line extends into the fuel tank and draws fuel from it.

Step 2: Check the Carburettor Connections

Make sure that the tank pickup line is connected to the bottom connection on the carburettor. The carburettor is the part of the engine that mixes air and fuel. It is usually located near the fuel tank.

Step 3: Verify the Primer Bulb Connections

Check that the line coming from the top of the carburettor is connected to the short hose barb on the primer bulb. The primer bulb is the small, rubbery part of the fuel line that you press to prime the engine.

Step 4: Check the Long Hose Barb Line

Ensure that the long hose barb line on the primer bulb is connected to the fuel tank. This line returns excess fuel from the primer bulb back to the tank.

Step 5: Correct Reversed Fuel Lines (If Necessary)

If you find that your fuel lines are reversed, simply swap the connections at the primer bulb. Connect the short line to the front of the primer bulb and the long line to the carburettor.

By following these steps, you can ensure that your fuel lines are properly connected and not reversed. Reversed fuel lines can cause problems with the engine's performance, so it is important to check and correct them if necessary.

Check the fuel lines are not blocked

To check that the fuel lines are not blocked, you should inspect the fuel tank for debris. You can do this by removing the rubber fuel line assembly boot from the fuel tank and looking inside.

If there is debris in the fuel tank, it is important to clean it out before reassembling the fuel line. This can be done using a strainer.

It is also worth noting that ethanol gasoline can cause fuel lines to rot, so if your Husqvarna 125B is not running correctly, this may be something to investigate.

Check the fuel lines are not damaged

To check that the fuel lines on your Husqvarna 125B are not damaged, you should begin by checking the fuel tank cap and the seal for the fuel tank cap to make sure that they are not damaged. Next, check the fuel hose to make sure that there are no leaks. If the fuel hose is damaged, do not use the product and contact your local authorised dealer.

You should also check the engine for leaks regularly. Be careful with the fuel, as it is flammable and the fumes are explosive and can cause injury or death.

If you are still having issues with your Husqvarna 125B even after running new fuel lines, there are a few things you can check:

• Add fuel to the hole of the spark plug and try turning the engine (half a teaspoon will be enough)
• Check if the spark is good
• Check for a gummed-up carburetor

Check the fuel lines are the correct size

When replacing the fuel line on your Husqvarna 125B, it is important to check that the fuel lines are the correct size. This is a crucial step to ensure the blower operates efficiently. Here are some detailed instructions to guide you through the process:

• Uncover the Fuel Line: Start by locating the fuel line on your Husqvarna 125B. Ensure that it is easily accessible and visible. Do not remove or disconnect the fuel line at this point.
• Use a 1/4-inch Wrench: Obtain a 1/4-inch wrench with an open end. Carefully slide the top of the wrench over the fuel line. Adjust it to fit snugly against the tubing. This method relies on the fact that tubing size is determined by its outside diameter. By fitting the wrench around the tubing, you can gauge the diameter of the fuel line.
• Check the Wrench Measurement: Read the measurements marked on the wrench. This will indicate the outer diameter of the fuel line. Wrenches are typically measured in inches or millimetres, so ensure you are reading the correct unit of measurement.
• Alternative Method with Calipers: If the wrench method does not provide an accurate reading or if you do not have a wrench, you can use calipers. Calipers are precision tools used to measure distances, and they can provide an accurate measurement of the fuel line's diameter. Carefully adjust the tips of the caliper so that they fit tightly on opposite sides of the fuel line.
• Measure with a Ruler: After taking the measurement with the caliper, place the tips of the caliper on a ruler. This will allow you to read the precise distance between the caliper tips, which corresponds to the outer diameter of the fuel line. Ensure that the ruler provides measurements in the same unit (inches or millimetres) as the caliper.
• Visual Comparison: As a supplementary method, you can also compare the fuel line with other nearby lines. This visual comparison can provide a rough estimate of the line's size, but it may not be as precise as using a wrench or caliper.

Remember, it is essential to have fuel lines of the correct size to ensure optimal performance of your Husqvarna 125B. Taking these measurements will help you source replacement lines with the appropriate diameter.

Frequently asked questions