@Majicwrench, thanks a bunch! This is a great forum, I'm very glad to be here. I am very new to using the "@" sign (yes, that much a numpty). I checked both versions of James Bauer to see if it would generate a User Name prompt. No dice. Looks like he's moved on. I can now see that having a space (or underscore _) between words for your user name causes ambiguity. I might try and change my user name to "NickOB" to remove that trouble.
Did anyone ever figure out a legit pump work around mine is cracked around the brass fitting, id like to keep this stove around its perfect otherwise! please let me know how we can swap this pump to something else.
@UPSTATE[ny}MADMAN I have successfully used JB Weld High Strength Plastic Bonder to seal the cracks in a dozen pumps back in 2019 and none of the cracks have returned. I will point out that none of the cracks were deep enough to expose the brass ferrule. It is very dry here and all but one pump developed cracks, including a few brand new pumps. I have converted one Apex II stove to use a Denali pump but those parts are no longer available. If your pump can't be fixed then you will have to wait for one to become available on Ebay that is in better shape, good luck with that. I'd send you one if I had a spare, but I Don't.
FYI see this is old thread about pumps for what it is worth this is what my Apex stove bottle looks like. Good as any Sigg or MSR bottle for fuel storage.
The not so secret secret of the instant lighting tubes is all in the metered orifice in the elbow on the long fuel/air tube. As many of you already know, these rely on back pressure once it's generating gas to stop the instant lighting air induction. The tubes are just interference/friction fit into the pump. If you can find a way to modify another pumps fuel pickup with that tube, you'd be almost home. Getting the external hose to work should be a walk in the park. If memory serves, there may be an internal check valve involved though I can't be sure. I know there would be a ticking sound coming from the bottle that went in rhythm with the chugging these puppy tend to do on full blast. I suppose that could just be the elbow tapping on the bottle from the generator feedback. It's been years since I worked on one though.
Someplace on this forum or maybe another I converted one of these to use a Chinese replacement screw on valve used the old clip on to stove end and adapted it to use with a Primus Ergopump MSR, SIGG bottles Isobutane and Butane with an adapter. I did this to my MSR Firefly as I'm not a fan of the MSR pump and wanted to use Isobutane on it. I bought a brand new unused Apex II kit from Ebay a couple years ago I opened it once and verified it was never used and packed it back up. Last week I was thinking of selling it and when I did a detailed inspection only to find that notorious crack around the brand new fuel tube to the pump. These pumps in general do work but are designed like crap. What they should have done is reversed the process of connecting the tube to the pump and not to the stove, that stiff hose and constant bending puts a strain on the crappy plastic molded around a brass fitting.. If I was a genius with machining skills I would pull the end of the connection to the stove and make an adapter to screw in one of these Chinese replacement valve and hose. Life would be good then???