Diagram fuel lines tank primer carbutor poulan pro weedeater

Excellent advice rycgl. After my Poulan/ZAMA carburetor seals dried out (no rebuild kit for my model) I bought a new replacement on ebay for $26. However, after a few minutes running, it began to starve for fuel. To cut to the chase, after a few disassembly passes, I found that the internal screen filter beneath the fuel pump (the bottom cover with no vent) was totally full of powdered aluminum. Took a couple passes to get it cleaned out, but the symptom of a fuel restriction is that the primer bulb will not immediately return to its popped-out state. Gas should easily flow through the complete circuit and back to the tank. Terrible factory quality from ZAMA. . . . Also, IMHO, the only replacement fuel line to use is the green Tygon stuff that doesn't die a fast death with ethanol in fuel. Excellent advice rycgl. After my Poulan/ZAMA carburetor seals dried out (no rebuild kit for my model) I bought a new replacement on ebay for $26. However, after a few minutes running, it began to starve for fuel. To cut to the chase, after a few disassembly passes, I found that the internal screen filter beneath the fuel pump (the bottom cover with no vent) was totally full of powdered aluminum. Took a couple passes to get it cleaned out, but the symptom of a fuel restriction is that the primer bulb will not immediately return to its popped-out state. Gas should easily flow through the complete circuit and back to the tank. Terrible factory quality from ZAMA. . . . Also, IMHO, the only replacement fuel line to use is the green Tygon stuff that doesn't die a fast death with ethanol in fuel.

I agree with you 100%. The big box stores are now selling that Startron ehtanol fighting additive. About 6.50 a bottle. I've done Ryobi's and they have a KIT for them at Home Depot with the 2 lines, an install wire, and the purge/primer bulb. Runs about 7.00. That kit has that black PVC fuel line. I'm with you, prefer the Tygon. It doesn't last forever, but it is fairly good quality and it's easy to tell when it is needing replacing, as it loses it flexifbiltiy. It was my pleasure to help you (I realize you know QUITE a bit more than most of the posters on here) and wish you luck with ALL your upcoming repairs. I don't understand that you couldn 't get a carb kit for the ZAMA. I thought they had rebuild kits and gasket and diaphragm kits for all of their carbs? Thanks for the reply and the nice vote. I appreciate you coming back to do so! I agree with you 100%. The big box stores are now selling that Startron ehtanol fighting additive. About 6.50 a bottle. I've done Ryobi's and they have a KIT for them at Home Depot with the 2 lines, an install wire, and the purge/primer bulb. Runs about 7.00. That kit has that black PVC fuel line. I'm with you, prefer the Tygon. It doesn't last forever, but it is fairly good quality and it's easy to tell when it is needing replacing, as it loses it flexifbiltiy. It was my pleasure to help you (I realize you know QUITE a bit more than most of the posters on here) and wish you luck with ALL your upcoming repairs. I don't understand that you couldn 't get a carb kit for the ZAMA. I thought they had rebuild kits and gasket and diaphragm kits for all of their carbs? Thanks for the reply and the nice vote. I appreciate you coming back to do so!

On my Poulan Pro pp125, I had a fuel starvation problem too, developing gradually. I checked to see there was no carbon build up on the exhaust screen, exhaust port or piston. Then I realized the fuel line was disintegrated. After taking apart the carb to clean it, I found strings of plastic from the fuel line in the area of the big needle valve. I had the carb apart twice, carb cleaner and compressed air through all the passages, but upon reassembly the primer bulb still wouldn't bring up much gas (even though the internal carb fuel screen was clear and I could tell there was good suction in the fuel line). I could get it running great for about a minute, perfect idle and quick throttle response. Then it would quit, and would only occasionally start for brief periods. I'm guessing there might still be a blocked passageway somewhere, but I'm ready to just toss it and buy another trimmer. I'm not sure it's worth spending money on a new carb or any for time messing with it. Any ideas on something I might be missing in diagnosing the problem? Thanks!....Pete On my Poulan Pro pp125, I had a fuel starvation problem too, developing gradually. I checked to see there was no carbon build up on the exhaust screen, exhaust port or piston. Then I realized the fuel line was disintegrated. After taking apart the carb to clean it, I found strings of plastic from the fuel line in the area of the big needle valve. I had the carb apart twice, carb cleaner and compressed air through all the passages, but upon reassembly the primer bulb still wouldn't bring up much gas (even though the internal carb fuel screen was clear and I could tell there was good suction in the fuel line). I could get it running great for about a minute, perfect idle and quick throttle response. Then it would quit, and would only occasionally start for brief periods. I'm guessing there might still be a blocked passageway somewhere, but I'm ready to just toss it and buy another trimmer. I'm not sure it's worth spending money on a new carb or any for time messing with it. Any ideas on something I might be missing in diagnosing the problem? Thanks!....Pete