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Fuel hose routing

The fuel hoses became brittle and broke off. I need to know if the tank outlet hose should go to primer inlet or carb inlet.Your help is appreciated!!

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  • marquis28 Sep 25, 2008

    good luck....I have the same problem after hurricane Ike

  • JCarr35392 Sep 29, 2008

    The fuel lines broke off. I ordered new ones but do not know how to put it back together. ALso, a new primer bulb. I have lost the owner's manual. Please help!

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  • 45 Answers

I would expect the hose to go:
fuel tank -> primer pump -> carburettor -> (overflow) fuel tank.

Good luck, they tend to be very fiddly.

Posted on Sep 28, 2008

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I need schematics for a chainsaw. The Maccullah chainsaw Mac 3214 32cc 2 stroke


Not to difficult to do, there are three hoses, the first comes from the fuel tank, this has the fuel filter on the end in the tank, this hose goes to the carb connection nearest to the carb pump cover ( the alluminium cover with a single screw holding it on ) the othe connection on the carb goes to the shorter connection on the back of the primer, this is the suction side, the longer connection is the pressure side and takes a pipe back to the tank, this pipe just pushes into the top of the tank, it does not need to be into the fuel, just remember the primer pulls fuel from the carb, into the bulb and dumps back to the tank, it does not push fuel into the carb.

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Checked all the parts lists, they seem to use the same primer through all types no.s part no. 530047213.

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WHAT IS THE FUEL LINE ROUTING FOR A POULAN 2375LE. IS THERE A ROUTING CHART?


The fuel line from the tank with the filter on the end, goes to the main fuel inlet on the carb, the conection nearest to the alloy pump cover held with a single screw, the other conection on the carb goes to the shorter of the two conections on the back of the primer ( the suction side ), the shorter of the two conections on the back of the primer ( the pressure side ) has a hose back to the tank, just remember the primer pulls fuel from the carb, into the primer, and then back to tank.

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Fuel hose from tank, with filter on the end goes to the fuel inlet on the carb, nearest to the pump cover held with a single screw, then a pipe from the other noozel on the carb goes to the shorter connection on the back of the primer, the pipe from the longer connection on the primer goes back to the tank, just remember the primer pulls fuel from the carb, into the bulb, and back to the tank

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I need to replace the fuel lines and was looking for a diagram on where each hose goes. Un fortunately they were so rotton the broke off before I could sketch their location


There should be three hoses, the hose from the tank with the filter on, goes to the fuel inlet on the carb, this is the connection closest to the pump cover held with one screw, the other pipe from the carb closest to the metering side, goes to the short connection on the back of the primer, this is the suction side, the hose from the longest conection on the primer, the pressure side, returns to the tank.
just remember the primer pulls fuel from the carb, and dumps it back into the tank, not the other way round,

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Need fuel line routing diagram


There are no diagrams of this, it is fairly easy to do once you know how it works, the fuel pipe from the fuel tank, with the filter on the end, goes to the carb inlet elbow ( closest to the pump cover held with one screw ) then the other hose from the carb ( closest to the metering cover held with four screws ) goes to the short connection on the fuel primer ( suction side ) then the hose from the longer connection on the primer ( pressure side ) goes back to the tank ( usually just pushed into the tank with nothing on the end )
The thing to remember is that the primer pulls fuel from the carb, into the bulb, and pushes it back to the tank, it is not technically a primer, it is a purge.
Hope i have explained this well enough,

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1 Answer

Walbro WT891 carb on a Craftsman chainsaw. Carb is brand new, all fuel lines and fule filter replaced. I prime the carb with the little plunger, chainsaw starts up and runs out of fuel within 30 seconds....


Who connected these hoses? the normal routing for a machine with a primer is like this, the fuel hose from the tank with the filter on the end goes to the carb fuel inlet nozzel ( not to the primer ) nearest to the pump cover ( cover on carb held with one screw ) the pipe from the metering side of the carb connects to the shorter nozzel on the primer bulb ( suction side ), the longer nozzel on the primer ( pressure side ) connects to the pipe going back to the tank, just remember the primer pulls fuel from the carb,into the bulb, and pushes it back into the tank, it is not actually a primer it is a purge. because it is connected this way it is impossible to flood the engine no matter how many times the bulb is pressed.
Let me know if it starts and runs.

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I have a Poulan 2375 chainsaw. The fuel lines became brittle and broke. I purchased new lines, but I need a diagram to see where the belong... there are two different size lines... but where the heck do...


The IPL (exploded parts list) for your saw is the only detail for fuel line routing and it is sketchy at best. It does show components and part numbers. Find it here:
Poulan.com
http://www.ordertree.com/modelinfo/POULAN-WEED-EATER/75.59.html
The dash number of your serial number is the type.
Typical fuel System:
af857b5.gif
Fuel Line Replacement by SmallEng.com
http://www.youtube.com/watch?v=JrXpU70Hmi0
  • The hose in the tank with the filter on the free end connects directly to the carburetor input connection.
  • If the saw is equipped with a primer bulb, the output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill as it inflates).
  • The pressure side of the primer returns displaced fuel to the tank as it is depressed.
Take lots of notes and a few digital photographs to help with reassembly. HTH
Lou


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the large hose from the tank goes to the suction side of the primer bulb. The large line from the out put side of the bulb goes to the bottom inlet of the carb.
the small line goes from the top outlet tube on the carb back into the tank near the primer bulb.

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The linefrom the tank with the filter goes to the mixture inlet on carb. The fuel return goes to the suction side of bulb. The bulb outlet line goes to the tank. Hopes this helps

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