Do the fuel guages work or is it something I am missing during the startup? Yes I do have the use fuel checkbox ticked.

They've always appeared to work for me - have you been checking the "Auxiliary" fuel useage?The B200 has quite a range - it burns fuel from the auxiliary tanks first. When you set the fuel gauges to the aux position, you will note that there is about 400 lbs. of fuel in the reserve tanks - this amount will indeed lower as you fly. When that is finished, it will switch over to the main tanks and you'll see those levels go down. I have average flights of 200 NM with the B200 - I have yet to see it use all of the aux fuel before touchdown.

Thanks. Yes that makes sence