Do you know if the 1.5lb is about standard on all bobcat AC units? i never got a sticker on mine, and wondered if i ever needed to re-gas it, how much 134a was needed.I have s650 as well. check fuses in a cabin next to left leg. Also check freon. s650 takes 134a total 1.5LB. flash, vacuum lines and recharge with 134a 1.5 lb.