PRODUCT DETAILS
Marine-grade aftermarket transom and swivel bracket sacrificial anode for selected 40 HP and 50 HP Mercury / Mariner outboard engines.
Designed to help protect the outboard transom bracket, swivel bracket and associated metal components against galvanic corrosion.
Suitable for selected Lightning, Lightning XR, MXL Marathon, MXL SeaPro and 50MH engine models.
Main Part Number: 8239121
Available in Zinc
Fitment – Mercury / Mariner Outboards
40 HP Models
40 HP Lightning – International
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Serial numbers: 0N000001 to 0N056164
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Selected manual and power trim transom bracket assemblies
40 HP Lightning XR – International
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Serial numbers: 0N000513 to 0N056164
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Selected manual and power trim transom bracket assemblies
40 HP MXL Marathon
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Serial numbers: 0N037781 to 0N056164
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Selected manual and power trim transom bracket assemblies
40 HP MXL SeaPro
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Serial numbers: 0N037781 to 0N056164
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Selected manual and power trim transom bracket assemblies
50 HP Models
50 HP – 50MH
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Serial numbers: 0N051023 to 0N056164
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Selected manual and power trim transom bracket assemblies
Important Fitment Notes
This anode is fitted to the transom/swivel bracket assembly.
Compatibility depends on:
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Exact Mercury / Mariner engine model
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Engine horsepower
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Engine serial number
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Transom bracket configuration
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Manual or power trim arrangement
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Original anode part number
Not every Mercury / Mariner 40 HP or 50 HP engine uses this anode.
Please check the original part number and mounting arrangement before ordering.
Replaces Mercury / Mariner Part Numbers
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8239121 – Main OEM reference
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823912002 – Additional catalogue reference
OEM part numbers are used for identification and compatibility reference only.
Important: This product is not the same as the smaller round anode 823912, which is used on different engine applications.
Product Details
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Product Type: Transom / Swivel Bracket Sacrificial Anode
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Design: Bar-style anode
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Material: Zinc
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Application: Mercury / Mariner Outboards
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Horsepower: Selected 40 HP and 50 HP
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Engine Models: Lightning, Lightning XR, MXL Marathon, MXL SeaPro, 50MH
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Mounting Location: Transom / Swivel Bracket Assembly
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Purpose: Galvanic corrosion protection
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Quality: Marine-grade aftermarket replacement
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Quantity: 1 anode
Package Includes
1 × Sacrificial Anode
Mounting hardware is not included unless otherwise specified.
Anode Maintenance
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Inspect the anode regularly during routine engine servicing.
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Replace when approximately one-third or more of the original material has been consumed, or sooner if required.
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Never paint or coat sacrificial anodes.
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Ensure clean metal-to-metal contact at the mounting surface.
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Check that the anode is securely fitted.
Important Compatibility Information
Before ordering, please confirm:
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Mercury / Mariner engine model
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Engine horsepower
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Engine serial number
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Transom bracket design
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Manual or power trim configuration
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Original anode part number
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Existing anode shape and mounting dimensions
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Required anode material
If the part looks the same as yours, this does not always mean it is the correct part for your outboard.
If unsure, please contact SSI Marine with your engine model and serial number for assistance.
Why Buy From SSI Marine?
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Workshop-tested aftermarket & OEM-spec 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 – collection available from Leigh, Greater Manchester
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Technical support from experienced outboard specialists
Buyer Responsibility
Please confirm compatibility with your exact Mercury / Mariner engine model, serial number and transom bracket configuration before purchase.
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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