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Old 10-14-2011, 01:03 PM
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bigred76 bigred76 is offline
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Default Re: Mr4 air problems

That's the valve set screw. If it was loose, it could cause serious marker malfunctions as well as cause your issue. However, it is most likely not the root cause in this gentleman's case since that issue is very atypical. It would be something to check out, but I think the velocity adjuster approach may be more fruitful.
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