Does anybody know of a green tinted fuel?? I recently purchased a Coleman 502 from ebay. It looked nice enough in the pictures though when I received it it was still full of fuel that seeped passed the rotted cap gasket. I replaced the cap gasket, lubed the pump cup and flushed the tank with alcohol because there was a green tint inside the tank which turned the alcohol green. I pumped up the tank empty and when I opened the valve, nothing. I removed the regulator, valve and packing and disconnected the pipe from the generator. I noticed the tip of the spring loaded rod from the fuel tube inside the regulator housing was stuck in down position so I ended up pulling the assembly from the fount. This is when I discovered the tip of the fuel tube was coated in hardened green gunk glued to the end. I was able to clean the assembly and put the stove back together. Current output is about 40% and I have a check valve issue. Based on the overall condition it looked to only be test fired. It's dated stamped 6/66 so I'm thinking it's possessed. I'll be running some new fuel through and hope it perks up.