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

40-300 HP Mercury Mariner Outboard 4 Stroke Dual Output Ignition Coil 8M0044991