I've had a search and couldn't find anyone with similar issues to me, I'm struggling to get enough adjustment out of the air gap. On the mantle side the movement upwards is blocked by the screw in holder for the ceramic flame spreader which is stopped by a bracket to guide the tube. This gives me a maximum of maybe 10 or 11 mm of air gap rather than the 14.5 I am looking for I thought of unscrewing the metal end a bit to increase the gap but it feels insecure and everything I've learnt about pressure lamps in general screams no to loose connections. Any ideas? Or has anybody experienced similar?
3 mm is quite a lot ... it may be that there is a too thick sealing package at the junction between the lower part of the carburettor and the tank. Normally only a lead sealing ring belongs in there, maybe there are other old seals in it? Another idea: are the rods on the carrying frame riveted or screwed? If screwed, then you can provide some height with one or two washers. I have already practiced this myself. Finally, the ring-shaped guide plate above the mixing chamber could also be pushed up one to two millimeters ... with gentle force and caution. Also practiced myself. Unscrewing the mixing chamber a bit is indeed not recommended, otherwise it would probably come loose gradually during operation
