Busy with a same 621, now stripped. Very complex design so need info. Looking for diagram. Is this a instant light? I assume so, and so one can use Coleman fuel... right?.
@Willem ...same as with the "red hats" in the standard 200HK shape. Just see my replies to the other posts. Unfortunately I haven't any diagrams. Please don't try to remove the valve stem, I don't think that it will come off easily.