Sierra 18-7607-1 CarburetorThe Sierra 18-7607-1 Carburetor has been precision re-manufactured to meet or exceed OEM specifications for Mercruiser Stern Drives. This carburetor has been re-calibrated and re-engineered to maximize fuel efficiency and performance. Additionally, it has been flow tested throughout the entire throttle range. The fuel mixture and idle settings are preset, and only minor idle and choke adjustments are needed. Includes base gasket. For Rochester Carb - Crusader 454; Use With: 18-7095 Carburetor Kit; Interchangeable with: Rochester; 17082403;