Hi all, A friend is machining a burner tube for an incomplete 238B that I acquired some time ago. I know that the thread size/pitch and tube diameter is the same as on the 249 and 237, but what is the total length of the tube and the lengths of the threaded section on each end? Also, what is the size or spanner size of the hex nut that secures the tube to the frame etc.? Any help is much appreciated.
I found enough of the info I asked for above, but could someone please also post the various dimensions of the 238B generator?
Hi @phaedrus42 , I'll have a look tomorrow, but I think a couple years ago Old Coleman Parts had the generators in stock. Maybe they're all gone now, but maybe it would not be a good idea to check with them. If I don't get back to you, please do send me a reminder!
@phaedrus42 If no one can come up with the dimensions, oldcolemanparts have repros. Generator Lantern
Hi Phil @phaedrus42 , I took some measurements of the generator this morning. Total length without nipple: 131,3mm. Dia of tube: 9,5mm, above the rings it is 8,3mm with 5,95mm inner dia. Rings are 2mm thick, 3,25mm space between, outer dia 14,2mm.They start at 20,55mm from the top, 16rings in total. Total length of ring portion is 79,5mm. Distance between bottom ring and flared bottom of gen is some 31,2mm. I did not manage to take out the second spring (yet), but inner dia of the generator for the full length of the spring will be very close to 8mm, at the top part it narrows down to the aforementioned 5,95mm. The thin "rod" in the inner spring has a little hook at the top, but I see no pricker or anything that can hold a pricker (this lantern has had a pretty hard life by the looks of it!). I also have a never lit 238B, but to be honest, I don't want to disassemble it to see what's inside for fear of doing something wrong to it! I hope this helps, when adding up measurements you'll see a difference of a couple tenth of a mm, but my digital caliper has a dead battery and my eyes are not good enough anymore to read the analog variety properly, even using reading glasses. Might need an update on them! ;-)
Thank you very much, @Wim ! This is what the cleaning needle looks like at the top end: The rod is thicker than a standard Coleman generator (237, 220, 201) rod. For easy (read: cheap) parts availability, the choice of jet will be between a Coleman 220 jet and a Petromax HK500 jet with the head machined narrower. Would be nice to use Petromax pricker needles too.
