Sierra 18-0871-1 JohnsonEvinrude Service Valve With O-Ring For use with JohnsonEvinrude Outboard Engines. Fits all JohnsonEvinrude wtih primer valve except 1993 9.9 15 HP. Primer solenoid allows use of fogging oil or engine tuner without removal of air silencer cover Use with 18-7044 Service Valve Kit 18-0993 Cover Gasket Assy Interchangeable with JohnsonEvinrude Outboard 175158 Replaces Sierra 18-0871 California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details