Question about Poulan 25cc 2-Cycle Gas Powered String Trimmer #P2500

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Last year I had to throttle it to keep the RPM's where it would run good enough to get the job done. As of 3/24 it won't even start. The gas is spot -on for the mix. Now, the primer bulb won't come back when I prime it. I pretty well figure it needs a carb. kit. Know where I can find one? But, I think the carb. needs adjustment, too. If it was a Rochester, not a problem. But, these little ***** dude's are a headache. Thanks in Advance

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You are right that you probably need a carb kit to rebuild the carburetor. It is not much of a carburetor as it has a idle adjustment screw and a high speed adjustment screw that meters through a very small orifice drilled into an aluminum block. It has a small fuel pump and a thin flapper valve arrangement. The problem with these small carburetors is that the gasoline oil mixture if left in the tank over winter solidifies on the tank filter and the internal parts of the carburetor. The flapper valve in particular is only a thin plastic type covering of an air channel that gets solidified over the inlet orifice and blocks the flow of fuel to the machine. The carburetor is more likely a Walbro which is used on many of the garden tools. See:
You may be able to just take the existing carburetor apart and clean it both the orifices and the gaskets and flapper valve. Don't forget the tank pick up filter as well. The alcohol laced fuels that we have to use now, increases the problem of blocked carburetor parts. When storing the machine for longer than a month, remove all of the fuel and put some sea foam or other gasoline additive in the tank, and when activating, use fresh gasoline with a small amount of additive to help clean the carburetor. I have had some success with removing the old fuel and adding fresh fuel mixed a little heavier with oil and a little seafoam, cranking the machine about ten times to get some fuel into the carburetor, then let the machine sit overnight to help dissolve the built up gunk. After you get it running then remove the fuel and add correct mixed fuel.

Posted on Mar 25, 2011


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