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Fits 20 HP Mercury/Mariner models with Serial # 6443973 thru OG760299. Helps deliver high-voltage spark to the plugs for smooth engine operation: 5186 is an ignition coil. Used to replace aging coils exposed to heat, vibration, and moisture.
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Part #: 5186
Mercury20 HPCoilWeight: 1 lb
4.0 / 5  (23 votes)
Fits 20 HP Mercury/Mariner models with Serial # 6443973 thru OG760299. Helps deliver high-voltage spark to the plugs for smooth engine operation: 5186 is an ignition coil. Used to replace aging coils exposed to heat, vibration, and moisture.
List Price: $87.85
Your Price: $28.95
Normally In Stock

In Stock items ship same day if ordered before 3PM CST (excluding weekends and holidays)

Replaces OEM#'s

339-7370A13, 339-832757A4

Product Details

Built for harsh outboard environments, this ignition coil supports clean spark delivery and dependable cylinder firing throughout the engine's operating range.

Marine-grade internal windings and vibration-resistant epoxy encapsulation help protect the coil from heat cycling, humidity, and electrical breakdown.

Features

  • Helps reduce intermittent ignition misfire
  • High-voltage ignition output design
  • Epoxy-sealed marine-grade construction
  • Helps support consistent spark delivery

Common Symptoms of a Failing Ignition Coil

  • Loss of power at higher RPM
  • Hard starting conditions
  • Weak or intermittent spark
  • Rough idle or hesitation

Need Fitment Help?

Tell us your brand, horsepower, and part number. We can help verify fitment before you order.

Support PDF files appear on this page when available.