PRODUCT DETAILS
CDI Unit / Ignition Module for Mariner Outboards
High-quality marine-grade aftermarket CDI unit / ignition module for selected Mariner 40 HP outboard engines.
Designed as a direct replacement for the original CDI where the part number and engine application match.
Fitment
Mariner Outboard
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40 HP
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Selected models using 11737M / 11737T CDI unit
Please check your original CDI part number before ordering, as different ignition units were used across 40 HP models.
Replaces Mariner Part Numbers
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11737M
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11737T
Searchable References
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11737-M
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11737-T
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11737M
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11737T
OEM part numbers are used for identification and reference purposes only.
Product Features
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CDI unit / ignition module
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For selected Mariner 40 HP
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Direct replacement where part number matches
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Marine-grade aftermarket part
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New
Important – Electrical Part
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:
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Engine HP
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Engine model
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Serial number
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Original CDI part number
We will be happy to help check compatibility.
Buyer Responsibility
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.
Why Buy From SSI Marine?
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Workshop-tested aftermarket & OEM-spec marine parts
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Same-day dispatch before 1 PM Monday–Friday
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Royal Mail Tracked 24
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UK stock
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Collection available from Leigh, Greater Manchester
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Technical support available
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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