The "Before Start" checklist is the only checklist read by another crewmember besides the F/E. It is read by the F/O. This is because the F/E is busy arming the start switches, configuring the pneumatic system, turning off the "A" system hydraulic pumps, ensuring the ground interconnect is closed, and turning on a fuel pump in each tank. While doing this he also has to respond to the F/E items that are called out by the F/O for the checklist to be complete. As soon as the "Before Start" is complete the pushback is started and the F/E sits waiting for the Captain to call "Start 1, 2, 3". This is the common for the F/O and F/E to begin the engine start sequence--which they must co-ordinate between themselves. The Captain only monitors the engine start (his primary attention is working with the pushback crew).

The F/O calls out the max E.G.T. (Exhaust Gas Temperature) for each engine. Once this is done the F/E calls out "STARTING 1" and engages the engine start switch on the overhead panel. While doing so he watches the duct pressure for a drop showing starter engagement and glances at the "A" system hydraulics to ensure there is no pressure in the system as the engine begins to spool up. If "A" system hydraulics begins to rise there is a faulty valve and the tug crew is in danger from nosewheel becoming active and swinging the towbar like an axe. As N1 rotation begins the F/O raises the START LEVER below the throttles which puts fuel and ignition into the system. At lightoff the engine continues to spool up and the F/E watches for a HOT or HANG start. The F/O then places the START LEVER into LOW IGNITION and calls "RELEASE". This is the signal for the F/E to release the start switch on the overhead panel. Upon releasing the F/E looks for a duct pressure rise and calls out "STARTER CUTOUT". At this time the engine start is complete and the next engine is started in the same fashion.

Upon completion of all three engine starts the Captain clears the Mechanic and Tug Crew off and calls for the "After Start" checklist. Upon hearing this the F/E completes a after start flow that puts Essential Power on an engine generator, turns on all the fuel pumps, caps the Engine Start Switches, configures the Pressurization system, and lastly turns on the "A" system hydraulics. He then begins to read aloud the "After start" checklist waiting for each response from each crewmember.

Upon starting to move the F/E then waits for the Captain to call "Cleared to Configure". To the F/E this means to configure the various systems for flight. One of the biggest failures in the configuration is forgetting to turn the A.P.U. off. Failure to do so (and failure of the Captain to notice in real life) can have catastrophic results.
 

APU Exaust Duct (in the main gear well)

At this point, in the simulator, there was always a monkey wrench thrown in: A runway change from the one that the F/E did all his computations for while doing the Pre-Flight. The object was to compute all the new T/O numbers BEFORE the moving aircraft reached the end of the active runway. With practice it was easily done. For the people who didn't practice it usually resulted in a mad scramble because---This was also where the Captain called for the "Before T/O" checklist. This is one of the longer checklist in the aircraft and is all challenge/response read by the F/E who also has to verify each individual item as it is called out. An astute Captain that wanted to help his fellow crewmember would slow his taxi speed down slightly giving the F/E a little extra time to compute the new numbers and complete the checklist.

Once reaching the end of the runway and T/O Clearance is received the Captain calls for "Below the Line". This is the final check as the aircraft takes the runway. At this point the F/E becomes a monitor and third set of eyes for the two front end crewmembers--but--he has to remain spring loaded with the brake interconnect, Essential Power Switching, Callouts, ect....

If everything goes smoothly the aircraft accelerates down the runway and begins to climb out. For the first time the F/E has a few seconds of rest before beginning the mundane task of maintaining the fuel in balance.