Replace that tired, weeping seal with Mercury’s 27-892211 OEM gasket and give your small-block sterndrive the dry, tight junction it was built for. Cut from a multi-layer graphite composite and trimmed to a tidy 3.35 in × 2.10 in profile, this gasket sits between the exhaust elbow and riser on most 4.3 L V-6 and 5.0/5.7 L V-8 MerCruiser blocks. Its precise port geometry lines up with the four 10 mm mounting studs, so installation feels as crisp as the day the engine left the crate.

Why the genuine part matters

• Graphite-reinforced core soaks up vibration and thermal cycling without squeezing out or sticking to the mating faces.

• Raised fire ring around the gas passage keeps cooling water and exhaust on their own side of the wall—no cross-leaks.

• Factory-cut bolt slots make mid-season swaps simple: slide, seat, torque, done.

The payoff? A quieter idle, cleaner bilge, and the peace of mind that cooling water is staying in the jacket while exhaust heads out the elbow—exactly as Mercury’s engineers intended.