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Blower: Leaks Gas

If your blower is leaking gas, there could be many parts that might need to be replaced. Some include the primer bulb, fuel filter, grommet, and vents. For a list of parts and repair help, follow our guide, and fix this common issue. Our repair information is a general guide to help you, but for more specific repair information related to your model, check your owner’s manual.

Gaskets
Gaskets
If you notice that your leaf blower is leaking fuel from the tank, but the tank itself is not cracked or damaged, you may have an issue with the fuel tank cap gasket. The gasket on your fuel tank ensures a seal when the cap is tightened. If the gasket is damaged or missing, there will be no seal, and the tank can leak fuel. Fortunately, if this is your issue you can simply replace the gasket without disconnecting the fuel tank.
If you notice that your leaf blower is leaking fuel from the tank, but the tank itself is not cracked or damaged, you may have an issue with the fuel tank cap gasket. The gasket on your fuel tank ensures a seal when the cap is tightened. If the gasket is damaged or missing, there will be no seal, and the tank can leak fuel. Fortunately, if this is your issue you can simply replace the gasket without disconnecting the fuel tank.
Primer Bulbs
Primer Bulbs
When you start your leaf blower, you will often depress the primer bulb which pumps fresh fuel into the carburetor, making it easier to start. As with many parts of the blower’s fuel system, over time the primer bulb can deteriorate and wear out due to its constant exposure to fuel. As a result, the primer bulb can crack, which will cause it to leak fuel. If your primer bulb is damaged, and fuel is leaking, it will become more difficult to start your blower. At this point you will need to replace the primer bulb. Thankfully this is usually a relatively easy repair.
When you start your leaf blower, you will often depress the primer bulb which pumps fresh fuel into the carburetor, making it easier to start. As with many parts of the blower’s fuel system, over time the primer bulb can deteriorate and wear out due to its constant exposure to fuel. As a result, the primer bulb can crack, which will cause it to leak fuel. If your primer bulb is damaged, and fuel is leaking, it will become more difficult to start your blower. At this point you will need to replace the primer bulb. Thankfully this is usually a relatively easy repair.
Fuel Tank
Fuel Tank
Your fuel tank is the reservoir where the fuel for your blower sits. The tank is usually exposed on the outer portion of the blower, and is therefore susceptible to cracks and breaks if it is hit with debris or dropped. Because these tanks are usually made of plastic, they can break relatively easily if you are not careful. This can cause gas to leak out of the blower and even get onto your clothes. If your fuel tank is cracked it will need to be replaced.
Your fuel tank is the reservoir where the fuel for your blower sits. The tank is usually exposed on the outer portion of the blower, and is therefore susceptible to cracks and breaks if it is hit with debris or dropped. Because these tanks are usually made of plastic, they can break relatively easily if you are not careful. This can cause gas to leak out of the blower and even get onto your clothes. If your fuel tank is cracked it will need to be replaced.
Vents
Vents
Fuel tank vents are basically check valves to let air in the tank, while at the same time preventing air and fuel from leaving the tank. If one of these vents become damaged or faulty, they can stop doing their intended job, and cause fuel to leak. A clogged vent can also cause your blower to shut down unexpectedly. This can happen because the fuel tank vent allows air into the fuel tank as the fuel level drops. If the vent blocked, when the fuel level drops it will create a vacuum inside the tank and eventually starve the carburetor of fuel. Sometimes this vent is in the fuel tank cap, and other times it is a separate part altogether.
Fuel tank vents are basically check valves to let air in the tank, while at the same time preventing air and fuel from leaving the tank. If one of these vents become damaged or faulty, they can stop doing their intended job, and cause fuel to leak. A clogged vent can also cause your blower to shut down unexpectedly. This can happen because the fuel tank vent allows air into the fuel tank as the fuel level drops. If the vent blocked, when the fuel level drops it will create a vacuum inside the tank and eventually starve the carburetor of fuel. Sometimes this vent is in the fuel tank cap, and other times it is a separate part altogether.
Grommets
Grommets
A small plastic or rubber grommet is used to create a seal between your fuel tank and your fuel lines. The fuel lines that run to your engine connect to the grommet from the outside of the tank, and the supply lines connect on the opposite side of the grommet inside the tank. This creates a seal to prevent leaking fuel. However, if your fuel or supply lines are not connected properly, or the grommet is cracked or damaged, it can result in fuel leaking out of the tank. Replacing a grommet is usually a fairly simple repair, and it can be easy diagnosed from the outside of the blower.
A small plastic or rubber grommet is used to create a seal between your fuel tank and your fuel lines. The fuel lines that run to your engine connect to the grommet from the outside of the tank, and the supply lines connect on the opposite side of the grommet inside the tank. This creates a seal to prevent leaking fuel. However, if your fuel or supply lines are not connected properly, or the grommet is cracked or damaged, it can result in fuel leaking out of the tank. Replacing a grommet is usually a fairly simple repair, and it can be easy diagnosed from the outside of the blower.
Fuel Lines
Fuel Lines
Your leaf blower’s fuel lines carry the fuel mixture from the tank to the engine. Because these lines are usually made of plastic, they can occasionally develop small cracks, which will leak fuel. If the fuel lines are not connected the engine properly, this can result in a leak as well. Before you decide to replace your fuel lines, make sure that it is not simply this connection issue. Fuel lines are usually located on the exterior of the blower, so they will be easy to inspect for small cracks.
Your leaf blower’s fuel lines carry the fuel mixture from the tank to the engine. Because these lines are usually made of plastic, they can occasionally develop small cracks, which will leak fuel. If the fuel lines are not connected the engine properly, this can result in a leak as well. Before you decide to replace your fuel lines, make sure that it is not simply this connection issue. Fuel lines are usually located on the exterior of the blower, so they will be easy to inspect for small cracks.

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