Mercury Carburetor Gasket – 27-139376

A healthy two-stroke starts with a rock-solid seal between the carb throat and reed block, and that’s exactly what this genuine Mercury Quicksilver gasket delivers. Die-cut from a fuel-resistant fiber composite, the dark-green sheet matches the four-bolt pattern on 75-115 hp inline-four outboards (plus 80 hp jet models). Its precision-milled port—narrow in the center, flaring to twin triangles at each end—mirrors the reed cage opening, so every piston pulse pulls a clean, un-turbulent charge into the crankcase.

Why it deserves a spot in your tune-up kit:

• Exact OEM thickness compresses just enough to seal without distorting the carb body or reed plate.
• Fuel-proof fiber blend shrugs off ethanol and premix oil, preventing blow-by leaks that rob power.
• Laser-clean bolt holes keep alignment perfect; no trimming or “close enough” aftermarket slop.
• Fits a broad lineup of 1990s-to-mid-2000s 75, 90, 100, and 115 hp 2-stroke Mercs—single carb or triple.

Swap it any time the carb comes off for jet changes or reed service. Ten minutes of work now means steadier idle, crisper throttle, and the kind of fuel economy that lets you run another mile or two before heading back to the ramp.