Craftsman- gas not flowwing to engine from tank under seat.

Initially release any clips by squeezing with a pliers and pushing back along the line. Lines can be prised off using a snipe nose pliers or flat blade screw driver, pushing on the edge of the line. Don't pull the lines which can stretch them.Two fuel lines leave the tank of a two stroke engine. The primer bulb sucks gas from the tank via the line with the filter on the end, gas returns to the tank via the other line without the filter. When you replace a line, to check whether they haven't been mixed up, fill the tank but leave the line without the filter above the level of the gas. When you push the primer bulb, gas should eventually squirt out the line without the filter. If the lines are mixed up, air bubbles will flow out of the filter and no gas out the other line.
For a pictorial guide and more info on troubleshooting 2-stroke engines and carburetors, see my guide here:

String Trimmer Won Work 2 Stroke Engine and Carburetor Troubleshooting

Take the seat off of the bike ,then take the tank loose and gently lift up on the tank ,turn the pet cocktail valve to the off position turning off the gas flow then remove the gas line from the tank and remove the 2 small vent hoses from the tank and set the tank off on the ground.directly under the tank is your fuel pump the line going fro,m the pump to the throttle bodies has a clear capsule shaped filter in it pack a rag under it too catch the gas loosen the clamps and remove the lines from the filter and put the new filter in the same way you removed the old one and reassemble the bike hooking the vent hoses back to the tank and the fuel line turn the gas valve back to the on position and bolt the tank and seat back down and your filter is changed

Your fuel filter is located inside of your gas tank. There may be an access panel under your back seat. If not, you'll have to drop your gas tank to gain access to your fuel filter and fuel pump.

hello sir,routing fuel line for craftsman,homelite,ryobi,hedge and line trimmers,fuel tank under engine, looking at machine from rear, shall fuel line on left with filter attached goes to bottom port of carb, fuel line from right side coming out of tank with inside tip attached goes to bottom port of primmer bulb,top line on primmer bulb goes to top port of carb, fuel tank under engine,fuel line routing,looking at machine from left side, left fuel line coming out of tank(drain back only) goes to right side small port of primmer bulb, left side larger fuel line from primmer bulb to top port of carb, fuel line coming out of tank (larger line) on the right side with filter attached goes to bottom port of carb, when replacing fuel line it is very important to use the same ID and OD line the homelite takes a special line that is black in color and a bigger size,the bigger line is ID .08-OD140 small line ID3/32 X 3/16.when the lines dissolve small pieces will get in the carb clogging small passages and screen,it is advisable that you clean out carb,and use a new filter.hope this helps,any comments welcome,thank you. if the filter has broken off of the line half way that is where you will run out of fuel, ``

hello sir,routing fuel line for craftsman,homelite,ryobi,hedge and line trimmers,fuel tank under engine, looking at machine from rear, shall fuel line on left with filter attached goes to bottom port of carb, fuel line from right side coming out of tank with inside tip attached goes to bottom port of primmer bulb,top line on primmer bulb goes to top port of carb, fuel tank under engine,fuel line routing,looking at machine from left side, left fuel line coming out of tank(drain back only) goes to right side small port of primmer bulb, left side larger fuel line from primmer bulb to top port of carb, fuel line coming out of tank (larger line) on the right side with filter attached goes to bottom port of carb, when replacing fuel line it is very important to use the same ID and OD line the homelite takes a special line that is black in color and a bigger size,the bigger line is ID .08-OD140 small line ID3/32 X 3/16.when the lines dissolve small pieces will get in the carb clogging small passages and screen,it is advisable that you clean out carb,and use a new filter.hope this helps,any comments welcome,thank you. if the filter has broken off of the line half way that is where you will run out of fuel, oo

first check for spark/ no spark, replace coil/ have spark/pull the fuel line off at carb and let flow into gas can, see if it keeps flows then slows/ replace fuel filter OR clean gas tank, it might have a filter in the tank also.
a jumper wire can be used to excite the fuel shut off solenoid on the carburetor if so equipped. also scotch lock can be used to bypass seat and clutch saftey switches for testing/diagnostic troubleshooting purposes.
let me know how you do

There MAY be a way to access it from under the rear seat or under the floor of the drunk. Remove carpet and rear seat to find out.
Otherwise, you'll have to drop the tank out in order to get to the filter. Before you continue with this, have you tried disconnecting the fuel line from the engine and turned the key on? The electric fuel pump (also in the fuel tank) only works when the key is in the 'on' position. You may have a fuel pump issue, not a clogged filter.
Also, there are probably two fuel lines going to the engine. One is going to the engine, the other is a return line going back to the fuel tank. Make sure you take off the right fuel line. If you remove the return line, you won't get any pressure anyway.

disconnect fuel line from fuel filter, snake fuel line over to left side of engine. Remove gas cap and fuel will empty out of fuel tank.

I have a 1996 CBR 600F3. Mine is directly under the gas tank. Where the gas tank meets the seat. If you remove the single top bolt for the gas tank and the lower bolt for the gas tank you can lift the tank a little. Then you will see the rubber gas fuel line. The filter will be in-line.

The tank will have to be removed from the vehicle and completely dried out.Gas tanks no longer have drain plugs as they did 50 years ago.Remove the fuel pump from the top of the tank,and thoroughly clean the tank with brake cleaner and compressed air and let air dry for awhile.The fuel pump and filter will need to be replaced with new,and after all the reinstallation,the fuel line must be disconnected at the engine,and the line flushed with new,clean gasoline as well as the return fuel line.Spark plugs will have to be replaced also.