How do you attach the fuel filter inside of the gas tank in a 2050 poulan chainsaw

The gas line goes from the gas tank to the carburetor and probably passes through the underside of the handle. The correct diameter hose is very important as it is used to form a compression seal with the gas tank using a coupling that connects to the siphon filter with a short length of tubing.

Try a few easy things first, hook the fuel hose out of the fuel tank through the filler hole and replace the filter on the end, follow the fuel hoses up to the carb and check foe any signs of fuel leakage, replace the affending hose if cracked.

the fuel line rots apart you need to replace the line pull the old hose out take a new hose cut down about a half inch cutting the line to about 1/3 slide a stiff wire down the hole and out the gas cap slide the hose over the wire and slide it back til the cut back end pops out put the filter on the end and pull it into place cut to size and install on the carb

Fuel components are onthe "Engine Assembly" & "Handle, Chassis, & BarAssembly" detail pages.
Replacement fuel lines can be found at yourlocal chainsaw seller/mechanic. They are different diameters.

Fuel Line Replacement

• The hose in the tank with the filter on the free end connects directly to the carburetor input connection.

• If the saw is equipped with a primer bulb, the output line from the carburetor connects to the suction side of the primer (once the bulb is collapsed it draws fuel from the tank through the carburetor to refill the bulb as it inflates).

• The pressure side of the primer returns displaced fuel to the tank as it is depressed.

The ful line actualy disloved and the problem is inside the carburtator there is a valve that lets fuel into the fuel bowl and also shuts it off when its full the floats control it so its always opening and closeing that is stuck closed from the melted fuel line you need to clean the entire carburator out the neddle valve may have a rubber tip at the seal point so take care not to damage it ware it makes the seal but its not hard to do anyone with some common sence and a little mechanical abilitly can do them selves

No drawings or pix, but will try for description--the line from the tank that has the fuel filter is the main fuel source which goes to the upper connection on the carburetor. The lower carburetor connection goes to the intake side of the primer bulb, and the outlet side of the primer goes back into the tank, which has no filter inside the tank. The main problem is determining the correct primer port to connect back to the carburetor. When everything is connected, try priming the carburetor. If fuel fills the bulb, you have everything connected correctly. If nothing happens, try switching the two primer port connections and try to pump fuel again. If still nothing, hook the main supply line from the carburetor over to one of the primer ports and try for fuel again--if still nothing, switch the main supply line to the other primer port and pump again. If still nothing, check for a plugged fuel filter in the tank. If the filter was plugged, then go through the previous procedure again. Make sure to replace the fuel lines with original rubber lines, not plastic. Hope this helps!

First rule is to replace only one line at a time. Needle nose pliers is the only tool you should need. Replace the fuel line from the filter in the tank to the carburetor by removing the filter from the line, extract the line out of the tank, and remove the other end from the carburetor. Use the old line to measure for the replacement. Measure the point where the old line passed through the tank wall down to the filter connection. Mark this point on the new line, and push the line into the tank far enough to attach the filter (which you have checked for plugging), then pull the line back out to the mark. Make sure that you use the proper line for this connection as the filter must flop around to the lowest tank level so that the saw doesn't run dry of fuel when operated on it's side. The other connections are straight forward--just replace one at a time. Don't be stingy in making looping turns as you don't want future kinks. Hope this helps!

A typical fuel system and a couple of suggestions follow:
http://www.fixya.com/support/r3706813-2_cycle_fuel_system_repair

An example of an IPL for a "2055 Gas Chain Saw Type 7" follows (may not be your saw):
http://www.ordertree.com/modelinfo/PWE/2055-Gas-Chain-Saw-Type-7/75.2055-Gas-Chain-Saw-Type-7.1.59.1.html

If not your saw, yours can be found here:
Poulan.com
http://www.ordertree.com/modelinfo/POULAN-WEED-EATER/75.59.html
The dash number of your serial number is the type.
I am reasonably sure the upper most carburetor connection (it bleeds any air in the carburetor, air rises) goes to the primer. Leave the hoses long enough to swap them and try it. They can be shortened once you verify the correct routing. Good Luck. HTH
Lou

Gas line diagram for poulan 2050 .

the bottom fuel line that goes to carb lower port also goes to the fuel tank look inside fuel tank threw gas cap hole to find the fuel filter hose is picking up the fuel and bringing the gas to the lower fuel port into carb (the upper from carb goes to prime or return to tank)