PRODUCT DETAILS
115–225 HP Mercury / Mariner Outboard OptiMax Air Compressor Filter – 35-853333T
Quality marine-grade aftermarket replacement air compressor filter for selected Mercury and Mariner V6 two-stroke DFI and OptiMax outboard engines.
Designed to filter incoming air for the engine's air compressor system, helping prevent dirt and airborne contaminants from entering the compressor.
Mercury / Mariner Outboard Applications
| HP | Engine Model | Application |
|---|---|---|
| 115 HP | V115 DFI 2.5L | Selected 2000 models |
| 135 HP | V135 DFI / OptiMax 2.5L | 1998 onwards, selected models |
| 150 HP | V150 DFI / OptiMax 2.5L | 1998 onwards, selected models |
| 175 HP | V175 DFI / OptiMax 2.5L | 2001 onwards, selected models |
| 200 HP | 200 DFI / OptiMax | Selected 1998–2002 models |
| 225 HP | 225 DFI / OptiMax | Selected 1998–2002 models |
Engine type: Two-stroke Direct Fuel Injection (DFI) / OptiMax.
The listed years are application guides. Compatibility must be confirmed against the engine serial number and original parts diagram.
Replacement Mercury / Mariner Part Numbers
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35-853333T
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35-853333
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853333T
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853333
Aftermarket cross-reference: Sierra 18-7997.
OEM part numbers are provided for identification purposes only.
Product Details
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Product: Air Compressor Intake Filter
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Engine Type: Two-Stroke DFI / OptiMax
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Application: Selected Mercury / Mariner V6 Outboards
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Condition: Brand New
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Quality: Marine-Grade Aftermarket Replacement
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Contents: 1 × Air Filter
Important – Check Compatibility
Mercury and Mariner use different air compressor filters depending on engine model, displacement and serial number.
Not every Mercury / Mariner 115–225 HP outboard uses this filter.
If the part looks the same as yours, it is not always the correct one for your outboard.
Please confirm your engine model, serial number and original 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 marine 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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