CDM Ignition Coil / Module for Mercury & Mariner Outboards

High-quality marine-grade aftermarket CDM ignition module for selected Mercury and Mariner 2-stroke outboards.

The CDM combines the ignition coil and CDI electronics in one unit and is used across a wide range of Mercury / Mariner engines.

Suitable for selected 30 HP–250 HP applications, including 2, 3, 4 and 6-cylinder engines, depending on model and serial number.

Fitment

Fits selected Mercury / Mariner 2-stroke outboards, primarily from the mid-1990s onwards.

Applications include selected:

30 HP
40 HP
50 HP
55 HP
60 HP
65 Jet
75 HP
80 Jet
90 HP
100 HP
115 HP
120 SportJet
125 HP
200 HP EFI
225 HP
250 HP

CDI Electronics identifies this CDM family for 2–6 cylinder Mercury and Force engines, while individual Mercury applications depend on model and serial number.

⚠️ Not every 30–250 HP Mercury / Mariner uses this CDM.

Always check the original part number.

Replaces Mercury / Mariner Part Numbers

827509A1
827509A3
827509A4
827509A7
827509A9
827509A10
827509T7

Additional Cross References

CDI Electronics 114-7509
Sierra 18-99161
Mallory 9-23202
Recmar REC827509A10

CDI Electronics confirms the 114-7509 replacement against these Mercury 827509-series references.

Important – A10 vs T7

On some Mercury engines, 827509A10 and 827509T7 can be used in different cylinder positions on the same engine.

For example, Mercury application information shows 827509A7 superseding to 827509T7, while 827509A4 supersedes to 827509A10.

Therefore, do not replace a CDM based only on appearance.

Check the number fitted to the individual cylinder position or verify using the engine serial number.

Product Features

CDM – Capacitor Discharge Module
Combined CDI / ignition coil unit
Mercury / Mariner 2-stroke applications
Selected 2, 3, 4 & 6-cylinder engines
Marine-grade aftermarket replacement
Includes high-tension spark plug lead
Replacement for 827509A10 / 827509T7
New

What's Included

1 × CDM Ignition Module / Coil

This listing is for ONE CDM only.

Multi-cylinder engines require one CDM per cylinder, but the correct CDM reference should be checked before ordering multiple units.

⚠️ Important – Check Compatibility

Please check:

Engine horsepower
Complete serial number
Original CDM part number
Cylinder position where applicable
Electrical connector

If the part looks the same as yours, this does not always mean it is the correct CDM for your outboard.

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

Buyer Responsibility

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

Correct ignition diagnosis is recommended before replacing a CDM, as stator, trigger, wiring or other ignition 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

30 HP-250 HP Mercury Mariner Outboard 2 Stroke CDM Ignition Coil 827509A10