Sierra parts are machined to perfectly match the OEM part they replace, which gives trained technicians and DIY mechanics the confidence they need when making necessary repairs. Parts are also designed specifically to be of marine-grade quality to resist corrosion and provide reliable operation for years. 18-8069 Applications:• Mercury Mariner: 22831Q3, 22831A3 Reliable construction will resist corrosion For Mercury Mariner engines | Sierra 5/16" Fuel Line Connector For Mercury Mariner, Part #18-8069