when throttling up?
Pro Chain Saw 50cc, 20in. Bar, Model PP5020AV

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Clean the carburetor. When the fuel deteriorate a ;ot of time trash is allowed to clog the carburetor.

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Chainsaws, like all small petrol engines, are fitted with a fuel filter which is used to screen dirt and debris from the petrol and prevent it from entering the engine where it could cause damage to the chainsaw.
Replacing the fuel hose on your vehicle is going to take time and patience, and it could require getting underneath the car. It`s also going to take the right tools for the job.

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I have a husqvarna 323L string trimmer. I stored it after running the tank & carb dry for about two years. I fueled it, then started it, & it ran for a minute then died like I turned the switch off. Since it would not restart, I found the fuel filter had broken off the hardened fuel line & it sucked gummy crap out of the tank & into the carb. Failing at cleaning the carb, I finally put a new carb on it & replaced the pump, hoses & filter. It has ran good till this year. I winterized it with stabilizer & left it with a full tank over the winter. The gas in the tank was gone when I got ready to use it this year. I filled the tank with premix, checked for leaks, then started it. It would run fine for about half a tank, start idling poorly (lean) then cutoff & refuse to restart till I refilled the tank. I finally found the tank had cracks & was letting pressure out of the tank & apparently this was causing the carb to lose it’s ability to siphon gas out of the tank. So I replaced the tank which came with new hoses & a filter, which I properly installed to the carb. It cranked right up, but when it runs a half tank, the carb quits sucking gas out of the tank. When I pump to prime the carb, it moves the fuel into the carb, but the pump never gets hard like it does when I prime the carb when the motor is cold. I have to keep refilling the tank, prime, & then it starts & runs until the tank gets about half empty. The new fuel filter is down in the gas tank properly, but It will not run after it shuts off until I refill the tank & prime. I’m baffled. New tank, new hoses, new filter, new carb, & I can find no leaks in the fuel system. It runs strong. The 323L is a two-stroke & it always cranks on the second pull from cold on a full tank. Any ideas?

What do I do now? I changed the fuel line and filter (the original line had rotted in tank), now the saw only idles when at half choke and dies when throttling up?
ANSWER : Clean the carburetor. When the fuel deteriorate a ;ot of time trash is allowed to clog the carburetor.

The fuel lines have rotted out of the edger gas tank. How do I fix or do I need to replace entire tank with new fuel lines?Since there are no male fuel line connections exiting the fuel tank and just two holes where the lines were, I guess I need to replace the entire tank and get a new one with lines already attached. Thanks.
ANSWER : No you can buy replacement fuel line but you must reconnect the filter in the tank that line goes to the bottom of the carby then out the top of the carby to the inlet on the primer then out of the primer and back to the tank.

Replaceing fuel line in polan 3300 chain saw – Poulan Pro 42CC 2 Cycle Chainsaw, 18"
ANSWER : Hi owjbhend…
Use a piece of wire and insert it into the fuel line, then bend a hook in the end and hook it over the end of the fuel line…lubricate the fuel line with some vaseoline very lightly…about the first one inch of the fuel line and then use your fingers to start the fuel line into the tank, once you have the fuel line in the tank give enough to hook the fuel filter to and so it can be dropped back into the tank.
Below is a drawing of how to route the fuel lines.
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Chainsaw idles, goes to high speed for a few seconds but dies under load. Sometimes cuts half a limb before it dies. Changed gas and then changed spark plug. Still dies.
ANSWER : Have you looked at the filter in the tank? get a wire hook fish around in the tank it should be on thend of a fuel line inside the tank

Have a craftsman 16″ chain saw 358.360260. Could not initially get it started after it had sat for a couple years with fuel stabilizer in it. When I went to use it the fuel had all evaporated and the fuel pick line was rotted. I replaced that with some difficulty but finally got it on. Saw still wouldn’t start. Replaced the fuel filter. Still wouldn’t start. Pulled the carb apart and cleaned and recleaned everything. Diaphragms were good and I didn’t adjust any of the mixture screws because as I said it ran fine before storage. Non of the carb passages were clogged. Fresh gas 40:1, good spark plug and good spark. Airfilter is good. Engine has maybe about 4 hours of total run time on it. It’s a ZAMA (?) carb. It will run for about 30 seconds when I manually prime it by pouring a small amount of fuel directly though the carb. When I was disassembling the carb the vent hose that goes back into the fuel tank seemed to have a small out of ?substance? in it which I cleaned out. It was right at the end the of the hose that goes back into the fuel tank and not up by the carb. It didn’t appear to be like your typical gummy deposits/varnish though. I hope it wasn?t some type of spongy check valve stuff that is supposed to be in there. That might explain some of my problems. Anyway, I also can not seem to get the primer bulb to fill. When I open the fuel tank, look in side and depress the primer bulb, air bubbles come out of the fuel filter. But when I let the bulb reexpand there’s no fuel that gets sucked up the hose. I can however seem to fill the primer bulb when the fuel tank is full and the chainsaw is laying on it?s pull cord side and the bulb is depressed a bunch of times. The saw will also start and run again for about 15 seconds then die. It’s definitely not getting/fuel and probably running out . Thanks.

I bought a Poulan PPB100 at a yard sale for $20.00. I got it home and got it started and running but it leaked gas like no tomorrow. I took it apart to see what was needed and found that all the fuel lines were crumbling. I cleaned out the tank and cleaned the carb and blew it out with compressed air from a can (computer stuff). I replaced the fuel lines but I’m not sure if I oriented them correctly. There are two lines going through the tank. A very skinny one and a larger one. I connected the new fuel tank pickup to the larger one. I also don’t know if I got the primer bulb tubes correct. The string trimmer starts using the normal procedure but it only runs best at half choke. Turning the choke off makes it die. Also if I give it throttle too fast, it’ll stall and die. What else can I do? Are the fuel lines and primer tubes the problem?
ANSWER : This is an ongoing issue for users, and rightfully so. Small diameter line out of fuel tank (has filter in-tank on end) connects to the side of the carburetor that has the fuel pump….that is the cover without the hole in it. Other larger diameter fuel line out of tank connects to the longer nipple on the external purge/primer bulb. The bulb “pulls” fresh fuel from the fuel tank to the carb and then out of the carb to itself, where it then pushes any air/old fuel back into the fuel tank. The remaining larger diameter fuel line in this setup goes from the metering chamber (has cover with writing on it and a vent-hole) side of the carburetor to the smaller nipple on the purge/primer bulb. Years ago on 2-stroke trimmers, primers were not even used,…you choked the carb with a slide lever and gravity let fuel enter the carb from above…a few pulls, a “pop”…slide it off of choke and away you went.If the purge/primer bulb is on top of the carb…small line from carb body to small hole in tank with filter. Larger diameter line goes from the bulb on the fuel pump side of the carb to the larger hole in the fuel tank where the line is held in place with a nylon nipple connector that keeps the line from pulling out of the tank.
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Poulan te 450 cxl fuel lines need routed correctly two line both in tank one to fuel filter other line?
ANSWER : Other line is just left open like to send gas back from the carb.