Sierra 118-5187 Ignition Coil for Mercury Mariner V6 DFI Outboard Engines

The Sierra 118-5187 (also known as 18-5187) is a high-performance aftermarket ignition coil designed as a direct replacement for Mercury and Mariner V6 DFI (Direct Fuel Injection) outboard engines. This coil meets or exceeds OEM specifications in fit, function, and durability, ensuring reliable performance at a cost-effective price point.

Key Features:

• Built with marine-grade epoxy and brass internals for reliable, high-energy spark
• Delivers smooth starts, strong acceleration, and consistent performance in harsh saltwater and freshwater environments
• Direct fit replacement for multiple Mercury and Mariner DFI applications
• Precision-engineered to meet or exceed original equipment specifications

Compatible Applications:

• Mariner: 200 DFI, 225 DFI, V135 DFI (2.5L), V150 DFI (2.5L)
• Mercury: 3.0 DFI engines
• Mercury V6 DFI engines

Replaces OEM Part Numbers:

• Mercury Marine: 339-85699A1
• 339-856991A1, 339-850227
• Mallory: 9-23201

Sierra is a trusted name in marine engine components, providing premium-quality aftermarket replacements engineered to withstand the demanding conditions of marine environments. This ignition coil is an excellent choice for maintaining peak engine performance and reliability.