Last days I dismantled a Petromax 500;polished it and replaced all lead seals, I did this for the first time, so it was quite an adventure...... Today I rebuild it, the carburetor lead seal was leaking at first start-up, so I had to replace that one once again. I saw a video on Youtube in which they said the carburettor needs 7-8 rotations and than it would be tight enough, so I did that, I found out that in my case it was 9. Also depends on the thickness of the lead seal of course.
After replacing the leaking carburettor lead seal, I pressurized it; it held good pressure, also after 2 hours and no leaks.
At the second start-up the lamp burnt well, although I have a few questions:
1. The rapid burner leaks only at start-up, not during the 2 hour pressure test; I suspect the rubber seal on the kliphebel, it looks a bit deformed? You can remove it by untighting the screw; but I cannot find a replacement loose rubber seal; only a complete Kliphebel (223). Any other suggestions what the leak could cause? I checked the lead seal of the rapid burner with leak finding spray, but no air bubbles what so ever.
2. After the lamp burnt for some time I shut it off, and pressurized it again to check the rapid burner on leaks. I noticed a hissing sound from the top of the lamp,that sound was not there when the lamp 's was pressurized for 2 hours .... Can it be caused by the fact that the carburettor was heated, I suspect the needle on top of the carburettor, but it's looks like its not leaking fuel from there.... Any suggestions, replacing the 'needle"? I have a spare...
Thanks in advance for your answers....