Thanks Dirk, very good advice.... I usually follow the fuel tank selection sequence you recommend - ie I don't change tanks after the run-up...to avoid the exact situation that occured to your friend...but we are only human...so the importance of strict adherence to a pre-takeoff checklist cannot be overstated... I hope he is OK and flying again...
But a more general take-away from your comment is probably the importance of studying and fully understanding the fuel system (and emergency procedures) for your particular aircraft....this has been the root cause of many many accidents....including John Denver in his newly purchased Long Eze
AQ