Was gifted this great (now around 81 year old) Coleman 500 marked D/1939 from @MrAlexxx After a good cleanup, some elbow grease and a bit of paint, I lit it up. It was running way to powerfull with no simmer - Got some help from @presscall who could tell me the jet should be around 0.34-0.35 mm. Turned out that mine was more than 0.5mm. Again Alex helped me out by sending me one of the jets from his own 500’s! - Now it was running wayy to meager. I then put in a thick copper washer between the jet and the generator tube. Now THAT helped - but still not there completely. Again Alex and John offered some advice as to screw in the pricker rod deeper into the regulator (like the pricker rod on a PX lantern). I managed to loosen the pricker rod. It was all the way to the bottom - so I removed 2.5 mm at the bottom of the rod. My goodness that made yet another difference!!! Now I am very satisfied as it is now both powerfull and holds a great simmer. Thank you very much HV Alex and John P. You are both top notch here in generousity and helpfullness. I hope to be able to repay you someday/someway!
Now you're seriously cooking! Very well done and I don't think it could have gone to a better home. Alex
Speedmasters are cracking stoves right enough. An oversized jet on one is something I’ve never encountered, but that’s one of the oldest. Glad to help. John
Very nice Harder. Everybody I know who has one of these stoves speaks highly of them. I’m still looking for one. Actually I have an eye on one just waiting for him to make up his mind that he’s ready to part with it.