The Sierra 18-2918 Outdrive Gasket Omc 911836 is a high-quality replacement gasket designed specifically for outboard engines. Manufactured by Sierra, a well-known brand in the boat parts industry, this gasket is made to fit the outdrive assembly and provides a secure seal to prevent leaks. With the manufacturer part number 18-2918-9, this product ensures a perfect fit and reliable performance for your boat engine.