Dual Output Ignition Coil for Mercury & Mariner Outboards

High-quality marine-grade aftermarket dual-output ignition coil for selected Mercury and Mariner 4-stroke outboards from 40 HP to 300 HP.

Designed as a replacement for Mercury 8M0044991.

Dual Output

One coil supplies ignition to two spark plugs on applicable engines.

Fitment

Fits selected Mercury / Mariner 4-stroke applications including:

• 40 / 50 / 60 HP EFI – 1C050252 & Up

• 65 Jet

• 75 / 80 / 90 / 100 / 115 HP EFI – selected 2B095049 & Up

• 115 Pro XS / SeaPro

• 135 HP

• 150 HP / SeaPro / Pro XS

• 175 / 200 HP 3.4L V6

• 200 / 225 / 250 / 300 HP 4.6L V8

Mercury's current application guide confirms 8M0044991 for selected 40–300 HP outboards across these engine families.

⚠️ Important

This coil does NOT fit every Mercury / Mariner 40–300 HP engine.

Always check the engine serial number and original coil part number before ordering.

Replaces Part Numbers

• 8M0044991

• 300-8M0044991

• 3008M0044991

Earlier / Cross Reference

• 8M0029482

Mercury parts catalogues identify 300-8M0044991 as the dual-output ignition coil reference.

Product Features

• Dual-output ignition coil

• Fires two spark plugs

• Selected Mercury / Mariner applications

• 40–300 HP

• 4 Stroke

• EFI applications

• Selected 4-cylinder, V6 & V8 engines

• Marine-grade aftermarket replacement

• Direct replacement where part number matches

• New

What's Included

1 × Dual Output Ignition Coil

Please Note

Some engines require two or more coils.

For example, Mercury 4-cylinder applications using this system normally use 2 × dual-output coils.

This listing is for ONE coil.

⚠️ Check Compatibility Before Ordering

Mercury uses several different ignition coils across similar horsepower engines.

Please check:

• Engine horsepower

• Complete serial number

• Original ignition coil part number

• Electrical connection

Appearance alone does not confirm fitment.

If unsure, send SSI Marine your engine horsepower + complete serial number + existing coil number and we will help check compatibility.

Buyer Responsibility

It is the buyer's responsibility to confirm compatibility before purchasing.

Correct diagnosis is recommended before replacing ignition components, as spark plugs, leads, wiring and other electrical faults can cause similar symptoms.

Why Buy From SSI Marine?

• Marine-grade aftermarket & OEM-spec parts

• Workshop-tested products

• More than 10 years supplying outboard parts

• Same-day dispatch before 1 PM Monday–Friday

• Royal Mail Tracked 24

• UK stock – collection from Leigh

• Technical support from experienced outboard specialists