Sierra 18-5186 Ignition Coil Direct Fit for Mercury/Mariner 6–125HP & Force 40–150HP 2-Stroke Outboards

Sierra 18-5186 Ignition Coil Direct Fit for Mercury/Mariner 6–125HP & Force 40–150HP 2-Stroke Outboards

The Sierra 18-5186 is a high-performance aftermarket ignition coil engineered as a direct replacement for Mercury/Mariner and Chrysler/Force outboards. Meets or exceeds OEM specifications in fit, function, and durability. Built with marine-grade epoxy and brass internals, it delivers reliable, high-energy spark for smooth starts, strong acceleration, and consistent performance in harsh saltwater and freshwater environments—perfect for cost-effective repairs and upgrades.

Quick Specs

• Replaces OEM: Mercury 339-832757A4, 339-7370A13, 339-7370B13; Chrysler/Force 339-7370A23
• Primary/Secondary Resistance: 0.5–0.7 Ω / 2.5–3.5 kΩ
• Voltage Output: 35,000+ volts
• Weight: 0.75 lbs

Special Order Item: Allow 3–7 business days for processing and delivery. Contact us to confirm availability and place your order – we'll handle the rest for reliable, OEM-quality performance.

Pro Tip: Test your stator before install to avoid failures.