I inherited a mac 3216 chainsaw with no manual. The gas lines are rotted away of course The primer bulb connects to the carb and the other line goes to the tank but how does it end?

Here you go (just learned this the hard way): # 2 lines go to the fuel tank: 1 all the way to the bottom, this is the fuel supply line and should have a good fuel filter on it; the other should only go in to the tank 1/2" to 3/4", this is the fuel return # the above mentioned fuel supply line connects direct to the carb on the chain side of the saw # another third hose connects the carb (on the starter side) to the inlet valve of the primer bulb (this is the shorter protrusion of the primer bulb) # the outlet valve on the primer bulb connects to the fuel return hose that goes back to the tank good luck