
The Poulan Wild Thing chainsaw is an 18-inch chainsaw with a fuel system that can be rebuilt. The fuel lines in the Poulan Wild Thing are prone to rotting and crumbling, which can cause the chainsaw to not start. The fuel lines need to be checked for kinks and suction, as the primer bulb pulls fuel through the carburettor and returns excess to the tank. The fuel line with the short nipple goes to the carburettor to suck the fuel through from the tank suction line.
| Characteristics | Values |
|---|---|
| Fuel line routing | One line to the primer bulb, the other from the primer bulb |
| Fuel line nipple lengths | Long nipple is the return line to the tank, the short nipple goes to the carb |
| Primer bulb function | Pulls fuel through the carb by vacuum and then returns excess to the tank |
| Fuel line replacement | Cut and remove old fuel lines, attach new fuel line to the carburetor and primer bulb |
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What You'll Learn

Fuel line routing
The Poulan Wild Thing chainsaw is a powerful tool, but like any machine with small gas engines, it can be prone to issues with its fuel lines. The fuel lines can become damaged, blocked, or corroded, and sometimes need to be replaced.
The fuel line routing on the Poulan Wild Thing is as follows: the primer bulb is connected to the fuel tank and the carburetor. The bulb pulls fuel through the carburetor by vacuum and then returns excess fuel to the tank. The primer bulb does not squirt fuel into the carburetor; instead, it forces fuel into the engine through the main fuel line under pressure. The long nipple is the return line to the tank, and the short nipple goes to the carburetor to suck the fuel through from the tank suction line.
If you are experiencing issues with your Poulan Wild Thing chainsaw, there are some basic checks you can perform. Firstly, check the fuel lines for kinks and blockages, paying particular attention to the suction line as this often has a filter attached. You should also check the mix screws and gaskets between the carburetor and plastic spacer on the block. If the carburetor is damaged, you may need to slide it back onto the mounting bolts and attach a new fuel line to the incoming fuel port.
It is important to note that the fuel lines must be attached correctly, or the chainsaw will not start. The primer bulb must be connected to the correct side, and the fuel lines should not be put on backward.
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Fuel line replacement
If the fuel lines of your Poulan Wild Thing chainsaw are rotten or broken, you will need to replace them. You can purchase a new fuel line from Amazon. Before you start, check that you have the correct parts and identify which line is the return line to the tank and which is the suction line from the tank. The long nipple is the return line to the tank, and the short nipple is the suction line from the tank.
Firstly, remove the old fuel lines. They may be rotted to pieces, so be careful when removing them to avoid breaking them further. Once the old lines are removed, you can start installing the new ones.
When installing the new fuel lines, be sure to put them on the correct way. The primer bulb pulls fuel through the carburettor by vacuum and then returns excess to the tank. It does not build pressure. The primer bulb is not meant to inject fuel to start the engine. If the fuel lines are connected incorrectly, the chainsaw won't start.
Finally, check for kinks in the new fuel lines and ensure that the mix screws and gaskets are correctly placed.
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Fuel line damage
When replacing the fuel lines, it is important to get the plumbing correct. The primer bulb pulls fuel through the carburettor by vacuum and then returns excess to the tank. The left hose comes from a filter in the tank to the carburettor. The right hose seems to just stick into the tank. The lower nipple of the carburettor has the hose that directly goes back into the fuel tank. This is the return line to the tank, while the short nipple goes to the carburettor to suck the fuel through from the tank suction line.
To check if the fuel line is damaged, users can try to start the chainsaw by dripping a little fuel mix into the spark plug hole. If the chainsaw starts and then dies, it is likely a problem with fuel delivery, which could be caused by a damaged fuel line.
When replacing the fuel lines, it is important to use the correct parts and to ensure that the connections are secure. It is also recommended to check for any kinks in the fuel lines and to verify that the primer bulb is functioning properly.
In addition to fuel line damage, other issues with the Poulan Wild Thing chainsaw may include air leaks, spark plug issues, and carburettor problems. It is important to thoroughly inspect the chainsaw and address any issues to ensure proper functioning.
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Fuel line plumbing
The Poulan Wild Thing chainsaw is a powerful tool, but like any machine with small gas engines, it is susceptible to damage from ethanol in fuel. This can cause corrosion to rubber and plastic parts, which can make the chainsaw very difficult to start.
The fuel system is a common area of concern for owners of the Poulan Wild Thing. The fuel lines, in particular, have been known to crumble and rot. This can lead to a lot of guesswork when it comes to reconnecting the fuel lines to the carburetor. The primer bulb and fuel line are often the first parts to be replaced in a Poulan Wild Thing chainsaw.
When it comes to fuel line plumbing, the first step is to identify the correct fuel line. In the case of the Poulan Wild Thing, the short nipple goes to the carburetor to suck the fuel through from the tank suction line. The long nipple is the return line to the tank. It is important to verify the correct ports by placing your fingers over the two primer ports.
Once the correct fuel line is identified, the next step is to attach the fuel line to the carburetor. If the primer suction line is damaged, the carburetor should be slid back onto the mounting bolts. One end of the new fuel line is then attached to the incoming fuel port on the carburetor. The fuel line is then moved through the primer bulb housing, and the desired length is marked and cut. If the old primer suction line is intact, the new fuel line can be cut to the same length and attached to the intake ports on the primer bulb and carburetor.
Finally, the cut end of the primer fuel line is attached to the intake port of the primer bulb. The carburetor is then slid back off the mounting bolts, and any remaining old fuel lines are cut and removed by pulling them through the housing.
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Fuel line deterioration
The Poulan Wild Thing chainsaw is a powerful tool, but like any machine, it requires regular maintenance to keep it in good working order. One common issue that can affect the performance of this chainsaw is fuel line deterioration. Over time, the black rubber fuel lines can lose their elasticity, becoming brittle and prone to cracking or crumbling. This can lead to fuel leaks, or even cause the engine to stop running altogether if the flow of fuel is restricted or cut off.
The fuel lines in the Poulan Wild Thing are responsible for delivering fuel from the tank to the carburetor, where it is mixed with air before being ignited in the engine. When the fuel lines deteriorate, they can no longer effectively perform this function, resulting in a range of issues that can affect the performance and operation of the chainsaw. In some cases, the fuel lines may become so degraded that they break or crumble, requiring complete replacement.
There are several factors that can contribute to fuel line deterioration in the Poulan Wild Thing. One of the most significant factors is the age of the fuel lines. Over time, the rubber material that the fuel lines are made of can become less flexible and more brittle, making it easier for cracks and leaks to form. Exposure to heat, sunlight, and certain chemicals can also accelerate the deterioration process, causing the fuel lines to degrade more rapidly.
Additionally, using stale or contaminated fuel can also contribute to fuel line deterioration. When fuel is left sitting in the tank for extended periods of time, it can break down and become gummy or varnished, which can clog the fuel lines and accelerate their deterioration. Operating the chainsaw in dusty or dirty conditions can also lead to fuel line issues, as dirt and debris can enter the fuel tank and clog or damage the fuel lines.
To prevent fuel line deterioration in the Poulan Wild Thing, it is important to regularly inspect and replace the fuel lines as needed. It is also recommended to use fresh, high-quality fuel and to drain the fuel tank when the chainsaw is not in use for extended periods of time. By taking proper care of the fuel lines and maintaining the chainsaw according to the manufacturer's recommendations, users can help ensure that their Poulan Wild Thing remains in good working condition for years to come.
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Frequently asked questions
To replace the fuel line, you must first drain the fuel tank and remove the screws securing the top cover to the saw. Remove the air filter cover, air filter housing, and old fuel lines. Attach one end of the new fuel line to the incoming fuel port on the carburetor, then move the fuel line through the primer bulb housing. Cut the fuel line to the desired length and attach it to the intake port on the primer bulb and carburetor.
The primer bulb pulls fuel through the carburetor by vacuum and returns the excess to the tank. It does not squirt fuel into the carburetor; instead, it forces fuel into the engine through the main fuel line under pressure.
If the fuel line is damaged, it may be cracked or broken. Check for fuel leaks and if the fuel lines are rotted or crumbled.
The long nipple is the return line to the tank, and the short nipple goes to the carburetor to suck the fuel through from the tank suction line.
To replace the fuel return line on a Poulan chainsaw, first drain the fuel tank. Then, remove the screws securing the top cover, air filter cover, and air filter housing. Disconnect the throttle linkage from the carburetor and trigger, then slide the carburetor assembly off the mounting bolts. Finally, attach the new fuel return line.











































