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Quick question...... Does a Lycoming, AC style, p/n 41272, medium pressure fuel pump have straight thread inlet/outlet ports, requiring O-ring fittings, or 1/4" NPT ports? I'm chasing some fuel pressure fluctuations on my ASII and I'm wondering if I have the wrong fittings (NPT) in my fuel pump. The fittings that Aircraft Spruce sells for fuel pumps are straight thread/O-ring style.