Question about Craftsman 25cc Gas Line Trimmer

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Poulan Trimmer PPB100 fuel lines

I have a poulan string trimmer Model#PPB100. I had let a friend borrow it. When he gave it back it would run. So, I took the filter off and held a gas soaked rag over it. It would run when I did that. While looking for where the fuel problem is a saw that the fuel line was disinegrating. The fule line the fell apart. Upon doing so where the lines connect was no longer there to see the proper way. I have new fuel line. What was left in the tank was the fuel filter and a white piece with a nipple on both side. Examinig the fuel tank there are just 2 holes in it. The holes are fluch and have nothing to connect to. There is a big and small fuel line. I have not been able to find a way to secure the lines in the tank. There does not appear to have any gasket or seel or a way to connect the fuel line to the tank. Also what is the proper way to connect the line to the primer bulb and carbeurator?

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The larger of the fuel lines is the main fuel line. It is the one that has the filter stuck in the end of it and runs out the larger hole in the tank to a fitting on the carb. The smaller line should be about one inch into the tank and comes out the smaller hole and runs to one of the nipples on the primer bulb. Press the primer bulb and put your finger in front of the fittings. The one that you feel air coming out of when you do this is the fitting that runs from the primer bulb to the carb. Hope this helps and good luck.

Posted on Jul 15, 2009

  • Carlos
    Carlos May 14, 2014

    This trimmer has two large lines and a small line?

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My neighber is having the same problem. Am I reading this correctly? One end of the small line goes 1" into the fuel tank, the other end goes to the suction side of the primer bulb. A second line goes from the pressure side of the primer bulb to the carb. And a third, larger line runs from the carb, into the fuel tank and has the filter on the end. This doesn't sound right. It sounds like unless the tank is within 1" of full, the primer bulb will simply pump air into the carb. I thought the routing would be... fuel filter on larger, main line, out of larger whole in tank to suction side of primer bulb. Line from pressure side of primer to carb (not sure which nipple on carb) and third line from carb, 1" into tank.
Please, clarify and specify which line goes to which nipple on carb. Thanks

Posted on Jul 17, 2009

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