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Early AA S400 leaks through gage

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I bought an S400 about 12 years ago iirc, and then didn't use it as I got a cheap .22LR Anchutz semi auto and an FAC.

I recently got the gun out of mothballs and gave it a clean and a re-charge from a scuba bottle.

The gun was fine when I put it away, but now leaks air through the gage (as far as I can tell (the little hole in the side of it)).

  • Is this something I can fix myself (i'm a reasonable mechanic on motorcycles) .
  • Is it likely to be the gage itself or should I just buy a seal kit - how can I test?
  • Cost/Experiences of tuning/regulating the rifle.

The gun was lovely to shoot and so accurate that it put several shots through the same hole when I was setting the scope up.

I had to dig the pellets out to convince myself I hadn't omitted loading before taking the shot. doh!



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If it's through the gauge itself, I doubt if it's possible to repair it but if it's through the fixing, you could always unscrew the gauge, clean the threads and then re-fix it with a decent layer of PTFE tape to seal the threads.



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