Yamaha 55 HP Outboard CDI Unit / Ignition Module / Power Pack

Premium-quality aftermarket CDI ignition unit / power pack for selected Yamaha 55 HP 2-stroke, 2-cylinder outboard engines.

Designed as a replacement for Yamaha CDI units:

663-85540-14-00

663-85540-15-00

Also replaces selected TIA02-10 / TIA02-12 ignition units.

Suitable for selected Yamaha 55 HP applications from 1989–1994. The 663-85540-14-00 / -15-00 family is documented as a 2-cylinder ignition pack for this Yamaha application.

Fits Yamaha Outboards

55 HP

2 Stroke

2 Cylinder

1989–1994

Selected applications include:

Year	Model
1989	CV55ELF
1990	CV55ELD
1991	C55ELRP
1992	C55ELRQ
1993	C55ELRR
1993	C55TLRR
1994	C55ELRS
1994	C55TLRS

These model applications are supported by aftermarket application data for the 663-85540-15-00 replacement unit.

Replaces Yamaha Part Numbers

663-85540-14-00
663-85540-15-00
663855401400
663855401500

Also Cross-References:

TIA02-10
TIA02-12
117-TIA02-12

The CDI Electronics replacement documentation also cross-references Mercury/Mariner numbers 83030M and 83030T, although I would leave these out of the main title because this listing is specifically targeting the Yamaha application.

Important – Check Your Existing CDI

Please check the CDI fitted to your engine BEFORE ordering.

This unit is for the selected Yamaha 55 HP 2-cylinder application using the corresponding CDI / power pack.

Your existing unit should correspond with one of the following references:

663-85540-14-00

663-85540-15-00

TIA02-10

TIA02-12

Rubber Retaining Band

This application uses the CDI arrangement with the rubber retaining band over the CDI unit.

Please compare the mounting arrangement, connections and part number with your existing unit before purchasing.

What Does the CDI Unit Do?

The CDI – Capacitor Discharge Ignition – unit is a major component of the outboard's ignition system.

It receives electrical signals from the engine's ignition components and controls the firing of the ignition coils.

A faulty CDI / power pack can potentially cause ignition-related symptoms such as:

No spark
Intermittent spark
Loss of spark on a cylinder
Poor running
Engine cutting out
Starting problems

IMPORTANT

These symptoms can also be caused by other ignition or electrical components.

A CDI unit should not be replaced solely because the engine has no spark.

Correct diagnosis of the ignition system is strongly recommended before purchasing or installing an electrical component.

Product Features

Premium-quality aftermarket CDI unit
CDI / ignition module / power pack
Yamaha outboard application
55 HP
2 Stroke
2 Cylinder
Selected 1989–1994 models
Replaces 663-85540-14-00
Replaces 663-85540-15-00
Replaces TIA02-10
Replaces TIA02-12
Direct replacement for corresponding application
UK stock

⚠️ Important – Electrical Part

PLEASE DIAGNOSE THE ENGINE BEFORE ORDERING.

CDI units can be incorrectly diagnosed when the actual fault is elsewhere in the ignition system.

Before replacing the CDI, the appropriate ignition components and wiring should be properly tested.

Installation of ignition components should be carried out by someone with the appropriate marine electrical knowledge. CDI Electronics similarly specifies professional marine-mechanic installation for its corresponding replacement power pack.

⚠️ Electrical Parts Returns

Please check compatibility carefully BEFORE opening or installing the CDI unit.

Electrical components that have been installed, connected or used cannot simply be returned as unused parts, as installation can make it impossible to verify their condition or whether they have been damaged by another fault within the engine's electrical system.

This does not affect your statutory rights where an item is faulty.

If you are unsure whether this is the correct CDI for your engine, please contact SSI Marine before installation.

Important – Please Check Compatibility

Before purchasing, please confirm:

Yamaha Outboard
55 HP
2 Stroke
2 Cylinder
Engine model
Engine year
Existing CDI part number
Electrical connections
Mounting arrangement

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

The safest way to identify this part is by the existing CDI part number and exact engine model.

If you are unsure, please send SSI Marine your engine model, serial number and preferably a picture of the existing CDI unit before purchasing.

Why Buy From SSI Marine?

Marine-grade aftermarket & OEM-spec parts
Workshop-tested products
More than 10 years supplying and servicing outboards
UK stock
Same working day dispatch before 1 PM Monday–Friday
Royal Mail Tracked 24
Technical support from experienced outboard specialists
Collection available from Leigh, Greater Manchester
Workshop open Monday–Friday, 9 AM–5 PM

55 HP Yamaha Outboard CDI Unit Power Pack 2 Stroke 2 Cylinder 663-85540-15-00