Few things are more frustrating than an outboard that sputters, stalls, or refuses to idle cleanly - and more often than not, the carburetor is at the heart of the problem. The Mercury Marine Carburetor - 1392-9726T18 is built to bring reliable fuel delivery back to your engine, restoring the smooth starts, steady idle, and crisp throttle response every Mercury owner expects.. This isn't some off-the-shelf replacement. It's an OEM part, built to match Mercury's exact specifications for the right air-fuel balance across all RPMs. From precision-machined jets to corrosion-resistant internal surfaces, everything about this carburetor is made to stand up to the realities of life on the water - including exposure to ethanol-blended fuel, salt spray, and long periods of inactivity. Straight out of the box, it's pre-calibrated for quick installation, so you spend less time tuning and more time running.. What makes this carburetor a smart upgrade:. Direct OEM replacement for select Mercury out