50-300HP Dual Output Ignition Coil – Mercury / Mariner 4-Stroke EFI (2003 & Up)

Precision-built, marine-grade ignition coil designed for Mercury & Mariner EFI 4-stroke outboards, delivering strong spark performance and reliable ignition.

Fits:

Mercury / Mariner
50HP – 300HP
4-Stroke EFI Models
2003 & newer

Important: Does NOT fit all engines in this HP range. Always verify your existing part number before purchasing.

Replaces OEM Part Numbers:

300-8M0044991
8M0044991

(Other cross references may include 8M004491, 8M0029482 depending on model – verify before ordering)

Product Details

Dual output coil (fires two spark plugs)
High-quality aftermarket, marine-grade construction
Direct replacement (where part numbers match)
Stable spark under load, corrosion-resistant design

Package Includes

1 × Dual Output EFI Ignition Coil

Buyer Fitment Notice

This coil will not fit all 50-300HP models.
Mercury used multiple ignition coil types across EFI engines.

You must check your existing part number first.
If unsure, message us with your engine model + serial number, and we will confirm the correct coil for you.

Why Buy From SSI Marine

Trusted UK marine parts supplier
Premium aftermarket components
Fast UK dispatch
Tracked 24 hr delivery available
Expert technical support before & after purchase

Shipping

UK Stock
Same day dispatch when ordered before 1pm (Mon-Fri)
Fully tracked delivery

50-300HP Dual Output Ignition Coil for Mercury Mariner 4-Stroke EFI (2003 & Up)