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Stacy AlexanderSep 4, 2025
What to do if the poppet valve (12-NXT100) on my Graco N22DT0 Engine is leaking constantly through the poppet muffler (58-120206) exhaust?
- MMackenzie ClarkSep 4, 2025
If the poppet valve is stuck open and exhausting air through the muffler in mid-stroke, remove and clean the poppet valve. Ensure that the o-ring (12d) and back-up ring (12c) do not remain in the end cap castings prior to re-assembly.





