High-quality marine-grade aftermarket CDI unit / ignition module for selected Yamaha 40 HP 2-stroke outboard engines.

Designed as a direct replacement for the original Yamaha CDI where the part number and engine application match.

Fitment

Fits selected Yamaha 40 HP 2-stroke / International / Enduro models, including:

Fitment can vary by market and engine specification. Please check the original CDI part number before ordering.

Replaces Yamaha Part Numbers

Yamaha 6F5-85540-21 was superseded by 6F5-85540-22.

OEM part numbers are used for identification and reference purposes only.

Please diagnose the engine fault before purchasing.

CDI / ignition problems can have similar symptoms to faults with other ignition or electrical components.

Electrical parts that have been fitted or installed cannot be returned unless faulty.

If you are unsure, please contact SSI Marine before purchase with your:

We will be happy to help check compatibility.

It is the buyer's responsibility to confirm compatibility with the engine model and serial number before purchase.

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