fuel line routing-craftsman chainsaw 358351580?

i took apart a chainsaw that had totally rotten fallen apart fuel lines.(ethanol in our gas)i need to confirm that the pickup line from tank goes to the primer buld then from there to the fuel pump inlet on the carbeurator.the other carb connection (near the center of the main body should be a return to tank.if you have a fuel line routing diagram i would like to see it just to make sure i have this correct.the tank has 2 holes one is bigger than the other so have to ASSume that the larger is for the pickup and the smaller is for a return line.