Mercury - Weather Cap 12-Pin Protective Cover 8M0178799. OverviewThis little cap keeps an unused 12-pin plug from getting full of salt, spray, or general boat gunk. It pops on in a second and hangs on tight, so you're not worrying about an open connector slowly corroding in the back of the boat. It's one of those things you don't think about until you need it, but it saves a lot of headaches later. Simple part, solid peace of mind.. Key Features • 12-Pin Protective Cover - Blocks water, grit, and salt from getting into the plug. • Moisture Barrier - Helps stop corrosion before it starts. • Firm Fit - Stays put even when the boat's taking a beating. • OEM Materials - Built tough for real-world marine use. • Quick Install - Push it on and forget about it.. Engine & Boat Compatibility • Rig center systems • 12-pin harness connectors • Multi-engine digital layouts. Performance & Practical BenefitsAn uncapped connector can collect moisture or grime pretty fast, so covering it keeps things c