PRODUCT DETAILS
SSI MARINE — CDI UNIT / POWER PACK / SWITCH BOX
Replacement ignition module for Mercury & Mariner twin-cylinder 2-stroke outboards (approx. 1997–2006). Reliable, OEM-compatible power pack to restore ignition timing and starting performance.
Key Specifications
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Applications: Mercury / Mariner outboards — Twin cylinder, 2-stroke
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Approximate Model Years: 1997–2006 (varies by serial/model)
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Horsepower Range: 6 HP, 8 HP, 9.9 HP, 10 HP, 15 HP, 20 HP, 25 HP
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Connection Types: Some units have bolted wire connections, others use plug connectors — please check your unit before ordering
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Condition: New aftermarket replacement (brand new in box / tested)
Replaces / Cross References
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Mercury OEM: 855713A3, 855713A4
Compatibility Guidance
This CDI / Power Pack is used on many twin-cylinder Mercury/Mariner 2-stroke outboards produced around 1997–2006. Serial ranges and exact fitment vary by model — always confirm your engine model and serial number prior to purchase.
If you are uncertain, provide your engine model, horsepower and serial number and our technical team will verify fitment for you.
What’s Included
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1 x CDI Unit / Power Pack / Switch Box (as described)
Important Notes
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Some models use bolted wire terminals instead of plug connectors — check your existing unit and order the matching type.
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Visual similarity does not guarantee correct fitment.
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It is the buyer’s responsibility to confirm the correct part for their engine prior to purchase. Contact SSI Marine if you need assistance.
Why Buy From SSI Marine
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Marine-grade aftermarket parts tested for reliability
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UK stock with fast dispatch and tracked delivery
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Technical support available to confirm fitment
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VAT receipt available on request; credit card payments accepted
Shipping & Dispatch
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Orders placed before 1:00 PM (working days) aim for same-day dispatch
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Orders after 1:00 PM dispatched next working day
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UK stock — tracked shipping
SHIPPING & DELIVERY
Delivery & Returns Policy
Delivery
Standard Delivery
- £6: Royal Mail Tracked 24 Service
- £3.99: Large Letter - Royal Mail 1st Class Post (Untracked)
We offer free delivery on all orders over £150 (excludes outboard engines).
Orders placed before 1:00 PM (Monday-Friday) are usually dispatched the same working day.
Most parcels are delivered within 24 hours, but please allow extra time for courier delays that may occur outside our control.
For outboard engines, please contact us for a delivery quote.
Important: Please ensure your shipping address is correct before completing checkout. SSI Marine is not responsible for parcels sent to an incorrect address provided by the buyer.
Tracking Your Order
Once your order has been dispatched, you will receive a tracking number via email (after 5 PM on the day of dispatch).
Tracking is available only for parcels sent via Royal Mail Tracked 24.
Large Letter orders are sent via Royal Mail 1st Class Post (untracked).
Returns
We accept returns of unused and undamaged items within 30 days of purchase.
Returned items must be in sellable condition and include the original packaging.
Please do not tape, label, or write directly on the product's original box.
Important: Do not return items in their original product boxes only, they must be placed inside a protective outer box or bag. Parcels returned like the example below will be subject to a 20% restocking fee.
Return shipping costs are the customer's responsibility.
Please include your order details and reason for return inside the parcel.
Refunds
Refunds are issued for the item purchase price only (shipping costs are non-refundable).
All refunds will be made using the same payment method as your original order.
Items returned in poor condition or without proper packaging may incur a 20% restocking fee.
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