I need to know how the fuel lines are hooked up in my ryobi gas trimmer. All of the fuel lines rotted out. I took them out and I need to know the correct connection sequences (what goes where).

SOURCE: I REPLACE THE FUEL LINES,NOW IT ACTS LIKE IT WANT TO START,BUT D'

http://outdoordistributors.com/pdf/Ryobi/RYOBI-700r-serials-304051232-thru-.pdf

Have a look at this drawing.

SOURCE: ryobi 700r gas trimmer, replace old fuel lines

Line from tank with the filter on it is the supply line and goes to the carb inlet fitting. This is typically on the "bottom" of the carb (with the tank being up) and will usually have a fitting with barbs or a bulge on it to ensure a tight fit. The other fitting on the carb is the return line and is usually a straight tube fitting with no barbs. That line goes the suction side of the primer bulb. The third line goes from the outlet of the primer bulb to the return barb fitting in the bottom of the tank. Fittings have to be removed from tank to properly install the new hoses on them. Remove retainer ring on outide of tank and push fittings into tank, then shake out of the fill opening. More details on replacing hoses are listed in another post about Repairing Ryobi trimmer.

To leemineres, if hoses are on right and unit still stalls after starting initially you probably need to disassemble carb and clean out using spray carb cleaner. May be sticky needle valve, or partially plugged port or jet.Could also be hole in diaphragm. Gasket and diaphragm kit would be good to add when you take apart, even if diaphragm does not have a hole.

SOURCE: i need a diagram for the fuel lines on a ryobi

Don't quite understand your dilemma... there are only two fuel lines which go from the tank to the carburetor.....if looking at the engine from the back, the fuel line on the left is the intake line and the one on the right is the fuel return line....on the back of the carb are two fuel line brass inserts...they are inlet on left and return on the right....hope this helps ;-D