Primer Bulb Fuel Line Routing- Fuel line Routing and Replacement Guide!

Dealing with leaky piping or worn-out dirty tubing in your chainsaw or snowblower might make you suffer, but getting it fixed might solve the issue.

Do you know what fuel lining routing your equipment has and how to replace them? For that’s important to determine what kind of Primer Bulb Fuel line Routing your equipment has with the correct routing pattern.

Well, most users think changing Line is easy, and we agree for sure, but replacing it with correct routing is beyond some users’ capacity unless they don’t know the right entry routes.

To make it easy to replace the lines, go through the main routing system with specific models and brands to find the correct pattern and let your equipment ready to work back efficiently. 

Primer Bulb Fuel Line Routing- Quick Answer

To know primer bulb fuel line routing for replacement of wear outlining, it’s necessary first to understand your primer bulb fuel routing. There are two kinds of fuel routing local primer carburetor and remote primer carburetor.

Suppose the primer bulb lies on the carburetor top. In that case, the local primer carburetor- bulb that pulls fuel- through the filtered fuel line- into the carburetor- then fuel is pushed out from the carburetor and returns through the unfiltered fuel line- back to the fuel tank.

If the bulb has a separate assembly, consider it a remote primer carburetor and has fuel lining- A filtered Line from the tank enters to carburetor- from carburetor to primer bulb- from the primer bulb into the fuel tank.

Based on these two types, different equipment would require the replacement as per the primer bulb location with a carburetor, so always get the right routing to avoid issues. 

Fuel Line Routing- Brief Info

A fuel line routing combines various hoses and tubing that are opted in a desired routing carrying the fuel. The line routing should be routed freely without any hurdles to ensure the required supply reaches the desired parts. Any issue with the routing stops the fuel supply, and ultimately stoppage of the machine occurs. 

Types Of Routing 

• Local primer carburetor (2 linings)
• Remote primer carburetor (3 linings)

1. Local primer carburetor

The local primer carburetor is a type of fuel routing in which the primer bulb lies above the carburetor with no extra assembly or attachments. In this kind of assembly, 02 linings are used. Filtered, and the other will be an unfiltered Line. Attaching both at the right ports is necessary. 

• The filtered Line goes into the carburetor, and the primer bulb pulls out the fuel from the tank and passes it to the carburetor. 
• The fuel is then pushed out of the carburetor and the unfiltered return line back to the tank through the second unfiltered Line. 
• Once the lining is correct, the above process occurs without inconvenience (no bubbles form during the test).  
• If you mix out the Linings, your corporator assembly won’t work correctly. 

Testing Of The Local Primer Carburetor System 

Procedure 

After reviewing the desired assembly, let’s check whether you put the lining correctly or not.

After placing the tubing into the carburetor, take a cup or bowl with fuel and place the tubbing’s ends. The cup would behave like a fuel tank.

Prime the bulb, and you will see that if the linings are correct, the fuel will be pulled into the carburetor from the filtered Line and pushed out of the unfiltered Line.

But if the lining is wrong, the filter line would have bubbles, meaning there is no fuel uptake by the Line because you placed the bad Line. Correct the linings and try again until you get the desired routing. 

2. Remote Primer Carburetor

In remote primer carburetor assembly, three linings connect the fuel tank, carburetor, and primer. The additional Line is for the primer bulb because the primer isn’t above the carburetor but requires a separate lining.

Adding a separate primer Assembly ensures the equipment is easily operated even in winter because of the availability of fuel for easy startup. Snow blowers and other equipment usually come with a remote assembly to make them operational even in winter. 

The assembled lining should be like this;

• The filtered Line from the tank enters the carburetor.
• From the carburetor, the unfiltered lining enters the primer bulb.
• From the prime bulb, the lining returns to the fuel tank. 

Testing Of the Remote Primer Carburetor System 

Procedure 

In a remote primer carburetor system, the primer on one side is attached to the carburetor while the other t the fuel tank.

When the routing is correct, the primer assembly will return the fuel through the return line into the tank with the formation of bubbles.

If the linings are placed wrong, you might observe the primer getting stuck and unable to pass the fuel back to the fuel tank. Repeat the test after changing the linings to check whether they are correctly placed. 

Mcculloch 3216 Fuel Primer and Gas Tubes Routing

Assembly type– Remote Primer Carburetor

Fuel line routing 

Mcculloch 3216 is another model or brand that would also opt for the remote primer carburetor system to make the system operational; most of the saws operate this system. If it has a primer bulb with a separate assembly, then considering the assembly would help replace the worn-out tubings.

It’s common that over time usage might make the Linings dull or wear out, and replacing is the ultimate fix, but when opting for your replacement, the user can get fused about which one to connect. Try out route lining for Mcculloch 3216. 

Primer bulb 

The primer bulb has 02 black clips that easily snap out from its back. These would connect the one Line joining the carburetor, and the other, in return, a few Lines.

Gas tank 

The gas tank comes with two holes one hole connects a filtered lining to the high carburetor port, while the other is put in the return line from the primer bulb. 

Overall routing 

Filtered fuel line- carburetor -lining -primer- lining- into the fuel tank 

The Craftsman 32cc Fuel Primer, Gas Tubes Routing (Fuel Line Routing)

Assembly type– Remote Primer Carburetor 

Fuel line routing

• In craftsmen 32cc, the assembly works based on the remote system where the bulb is separately connected with a lining. 
• In the assembly, a filtered fuel with a less-diameter line from the tank enters the carburetor. 
• On the carburetor, two ports are present. (Observe them; a slight change in size would help you determine the right one). From the carburetor, another large line enters into the left port of the primer bulb. 
• From the right side, another post exists with a lining that takes fuel back from the primer into the fuel tank. And this is how the assembly completes!
• The complete purge system is specially designed for the Craftsman 32cc engine having the high-quality Zama carb. 
• If you have a 25cc model, then trying this system would make it functional. 

Poulan Pro 31 cc MOD PP335 Fuel Line Routing 

Assembly required- Remote Carburetor Assembly 

Fuel Line Routing 

The model also operates using the remote system and has the following main step and routing;

• The clear main filtered Line goes from the fuel tank and enters the carburetor inlet port. 
• Form carburetor 2^nd Line is attached that goes from carb into the back side of the primer bulb.
• From the primer bulb, the 3^rd lining goes back into the fuel tank. 

Conclusion 

We make things easy for our readers and users, and this time getting the right primer bulb fuel line routing remained the main focused target.

Fuel routing plays an important role in adequate fuel supply, and because of that, your equipment runs effectively and efficiently, but any wrong replacement causes the primer o get stuck, and no fuel is supplied. 

Two routing systems exist the local primer carburetor routing and the remote primer carburetor. Based on these, your equipment would follow one. So, find the routing assembly and get it set back to the right position.

We hope you will now easily replace the fuel line routing. For more query-solving guides, check out our blog site and fit the best relevant and more detailed Info regarding each query with a quick solution.