Sierra 18-3730 Lock Nut for OMC and Volvo Penta Engines Sierra high-quality engine components are designed to meet OEM standards. Interchangeable with OMC Stern Drive 3852648 3853329 Volvo Penta 3852648 3852648-9 California Residents WARNING Cancer and Reproductive Harm - P65Warnings.ca.gov Other Details Google Product Type Engine Parts Product MPN 18-3730 Product UPC 808282103347 Fast Ship In Stock Ships Today