Description
The Sierra 18-5158 Mercury Ignition Coil is a premium, direct-replacement solid-state ignition coil pack engineered for marine environments. It features a low-resistance design to maximize voltage output for reliable spark performance and includes integrated heavy-duty heatsinks along with a brass secondary post for premium heat dissipation and corrosion protection.
Product Specifications
- Connector Design: 5-pin terminal setup.
- Secondary Post: High-quality brass.
- Internal Construction: Solid-state epoxy-filled insulation.
- Standards Compliance: Meets or exceeds strict OEM standards.
- OEM Interchange Numbers: Replaces Mercury / Mercruiser parts 8M0077471, 879984T01, 879984A1, and 879984T00. It also interchanges with CDI part 184-0004.
Engine Compatibility
This coil is designed for a broad configuration of Mercury outboard systems, including EFI and DFI 2-stroke and 4-stroke variants. Standard applications include:
- 30-40 HP EFI (3-cylinder Mercury models).
- 40-60 HP EFI (4-cylinder Mercury models).
