My Radius 42

Here is my Radius 42 that I recently purchased at auction. It is the later style with the combo SRV and fuel cap. Suggestions on a date range would be appreciated, but from my reading I'm thinking it is 40's - early 50's?
I have not fettled the SRV yet as I don't have a seal. I was able to replace the fuel cap seal with a spare Coleman 427 that I had; near perfect fit.
After soaking the jet nipple in lye over night (the needle pricker wouldn't insert otherwise), I have the bluest flame of any of my single burners (now they'll all be getting the treatment).


Thanks for looking!

 

That SRV is very easy to service - 42/55 is the seal and made from a thin sheet of fuel resistant rubber, the small center hole need to be there as well as at least one of the larger holes - no adjustment but the thin metal washer 42/56 need to be in one piece and the spring long enough to close the diaphragm valve.

If it doesn't leak, there should be no major problem with it as most problems are cracks in the rubber sheet.

 

The design of stove and tin you have was introduced before 1939 but any part marked "Radius LTD" was made later than June 1939 and all Radius stoves not on military contracts and not easily re-badged as Optimus were discontinued before 1964 - I think this one was made in the 1940's as most parts seem to be non-LTD.

One note about the 42 burner - the jet is slightly smaller and the burner bell has smaller air intake than most comparable stoves like Optimus 80 and 8, Primus 70 and 71, and Svea 123 - jet and bell fits between those but in the case of 42 jet and bell need to be both 42 or nor 42 to burn correct.

 

One of my favorite hiking stoves although I prefer not to use that combi/filler lid (too many parts).
@Lennart F
Thank you - a lot of good info there.

 

Thanks for those notes!

What are you using as a replacement for the filler cap? I tried the svea 123R but the thread count is different.

 

I use the older/first version, where the filler cap is located underneath the fount/tank

 

Makes sense. If I decide to keep this one and use it regularly I may have to seek one out. Otherwise the current cap is working at the moment.

 

Iff the current cap is working, use it.
I use the filler cap from Optimus, probably from a 111.