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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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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 have a WEEDEATER XT125.I don't remember how the fuel lines from gas tank are routed to the primmer bulb and from there to the carb. HELP??/

the fuel line from the tank with the fuel filter on it goes to the inlet port of the carburetor then the inlet hose of the primer bulb goes to the outlet of the carburetor and the last hose goes from the outlet of the primer back to the fuel tank

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I have a craftsman 358.797931 w/ a walbro carb with primer bulb on top.what line takes the fuel filter and which line goes where on carb. Top and lower tubes

The hose with the fuel filter will go to the bottom of the carb, the top hose off the carb will go to the inlet of the primer and the primer outlet will return to the tank

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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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I have a Craftsman chainsaw model 358.352160 and had to replace all my fuel hoses and filter. Now I can't get fuel to the carburetor and the primer ball will not pull fuel from the fuel tank.

Sounds like you have the hoses hook up wrong.

The hose from the tank goes to the bottom of the Carb. The line from the top of the Carb goes to the inlet side of the primer bulb (put your finger on one of the ports and push the bulb, if it collapses without returning then thats the inlet side). The outlet side of the bulb should go tank.

Good luck!

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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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1 Answer

I am replacing the fuel tank assy and purge bulb (i.e. primer) on my Sears Craftsman model 358.798940. The original plastic tubing was old and brittle and broke apart while disassembling, so I could not...

The order of fuel travel should be:
Fuel filter to fuel hose to Carb's Fuel Supply nipple. (On the main body of the carb)
Primer Plate Nipple on carb to fuel hose to Suction Nipple on Primer Bulb. (It must pull fuel thru the carb, not push)
Pressure Nipple on Primer Bulb to fuel hose to Fuel Tank Return hose.

When correctly installed, the fuel will be PRESSED into the fuel tank via the return hose when primer is pressed in . . . and SUCTIONED out of the tank and into the Carburetor when primer in released.

Hope this helps,

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The line from carb goes to bulb inlet, the bulb outlet goes to tank. Line with filter goes to carb inlet.

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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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