I have one of the coleman pump style lanterns and just retrieved it from someone in my families where it had been stored for a while. It worked fine the last time i used it, which was about a year ago. However now, it will not pump right and build up pressure. I took the pump piece out and cant really find anything wrong with it. The seal looks a little worn but okay. Also, the fuel knob for increasing the fuel just turns very easily. I dont know if it is messed up too or just freely turns due to no air pressure from a faulty pump. Have any of you guys tried to fix a lantern like this or is it just better to buy a new one?