PRODUCT DETAILS
75–400 HP Mercury / Mariner Outboard Fuel Filter Element – 8M0122423
Quality marine-grade aftermarket fuel filter element for selected Mercury and Mariner OptiMax DFI, Pro XS and supercharged Verado outboard engines.
This replacement screw-in fuel filter element is designed to help remove water and contaminants from the fuel system, protecting fuel-system components and supporting reliable engine operation.
Mercury / Mariner OptiMax DFI Applications – 2 Stroke
1.5L Three-Cylinder OptiMax
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75 HP OptiMax DFI
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90 HP OptiMax DFI
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115 HP OptiMax DFI
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125 HP OptiMax DFI
3.0L V6 OptiMax
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200 HP OptiMax DFI
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225 HP OptiMax DFI
Pro XS DFI
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200 HP Pro XS 3.0L
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225 HP Pro XS 3.0L
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250 HP Pro XS 3.0L
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300 HP Pro XS 3.2L
Mercury / Mariner Verado Applications – 4 Stroke
Four-Cylinder Supercharged Verado
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135 HP Verado
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150 HP Verado
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175 HP Verado
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200 HP Verado
Six-Cylinder Supercharged Verado
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200 HP Verado
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225 HP Verado
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250 HP Verado
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275 HP Verado
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300 HP Verado
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350 HP Verado, selected models
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400 HP Verado, selected models
Important Serial Number Guidance
The following are catalogue application guides, not universal fitment guarantees:
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75–115 HP 1.5L OptiMax: Selected engines from serial 1B227000 onwards.
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3.0L V6 OptiMax: Selected engines from serial 1B227000 onwards.
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135–200 HP Four-Cylinder Verado: Selected engines from serial 1B311420 onwards.
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200–300 HP Six-Cylinder Verado: Selected earlier-generation engines, generally serial 1B390143 to 2B144127.
The 350–400 HP applications must be checked against the original fuel filter and engine serial number.
Not suitable for every OptiMax, Pro XS or Verado engine.
Replacement Mercury / Mariner Part Numbers
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8M0122423
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35-8M0122423
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35-8M0060041
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8M0060041
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35-8M0020349
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8M0020349
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35-884380T
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884380T
These are replacement and superseded references for the applicable fuel filter element. OEM part numbers are used for identification purposes only.
Product Details
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Product: Fuel Filter Element
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Type: Screw-In / Replaceable Cartridge
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Filtration: 2 Micron
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Location: Under Engine Cowling / Fuel Filter Housing
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Application: Selected Mercury / Mariner OptiMax DFI, Pro XS and Verado Outboards
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Condition: Brand New
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Quality: Marine-Grade Aftermarket Replacement
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Contents: 1 × Fuel Filter Element
Important – Check Compatibility
Mercury and Mariner use different fuel filters depending on engine generation, displacement, fuel-system configuration and serial number.
If the part looks the same as yours, it is not always the correct one for your outboard.
Please check your engine model, serial number and original fuel filter part number before purchasing.
For technical assistance: https://ssimarine.co.uk/pages/contact-us
Why Buy From SSI Marine?
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Celebrating 10 years supplying outboard parts in the UK (2016–2026)
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Over 10,000 genuine and aftermarket outboard parts stocked
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Over 20 years of marine engineering experience
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Official Tohatsu Outboards Dealer
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Workshop-selected replacement parts
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Same-day dispatch before 1 PM, Monday–Friday
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Royal Mail Tracked 24 UK delivery
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Collection available from Leigh, Greater Manchester
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Workshop open Monday–Friday, 9 AM–5 PM
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Expert technical support
Buyer Responsibility: Confirm your engine model, serial number and original part number before ordering.
SHIPPING & DELIVERY
Delivery & Returns Policy
Delivery
Standard Delivery
- £7: 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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