Small Engines (Lawn Mowers, etc.): gas trimmer, gas trimmer, dry rot

Question
I recently received a craftsman trimmer and the gas lines were all dry rot as well as the primer bulb. I went to sears.com and typed in the part # 316.798221 and the schematic that was brought up did not help me. I have what looks like three hoses in the assembly, but can only see where two would hook up. Thought maybe you could find a better pic so I could see how they hook up. Any help appreciated. Justin

Answer
It looks like it is a trimmer made by IDC/Ryan/Ryobi, but in general,
the primer bulb pulls fuel through the carb, and returns the excess back into the tank.
There shoul be 2 nipples on the carb, one is closest to the cover held on with 1 screw, that line goes into the tank and is attached to the fuel filter.  The other nipple, the one closest to the cover of the carb that has 4 screws, goes to the primer bulb.  The primer
bulb has 2 nipples, the fuel only flows in 1 direction, the fuel flows from the carb, into the primer, then back to the tank.
Hope this helps.