The Sierra 18-7044-1 Service Valve Kit is designed to fit all Evinrude/Johnson engines with primer valves (excluding 1993 9. 9 HP and 15 HP). The kit contains one Sierra 18-08871-1 Service Valve with O-ring and one Sierra 18-0993 Cover and Gasket Assembly. It is interchangeable with Evinrude/Johnson 175158+437228.