My Primus 5 seems to have developed a leak. It was working fine for the several months I have owned it. It started burning down at the priming pan which caused an under burn. I replaced the jet and the washers on the burner, on top of the priming pan and underneath. Not knowing quite what to do, I put the gray lead (??) washer on top and the orange fiber looking one on the bottom. I also added a brass mesh screen in the burner tube. The burner burned normally on low pressure for about 30 seconds to a minute and then would develop a flame at the primer pan. I kept tightening the burner and watching it closely. It would burn normally and then I could see liquid kerosene seeping out on top the pan. When enough collected it would ignite. I kept tightening until now it will burn normally. At higher pressure, about 12 pumps, I can still see some seepage but it is not leaking fast enough to collect enough to ignite. It is very close to igniting but I did burn it for about 10 minutes under high pressure. I have two questions. 1) Is the type of gaskets I am using correct? 2) How tight do you tighten the burner? Right now I can't make it any tighter but I can still see the seepage. The "stain" you see on the burner nut is seepage.