Fuel Filter for Mercury Mariner DFI 115-225 HP (Replaces 35-853333T, 35-853333, Sierra 18-7997)
Fuel Filter for Mercury Mariner DFI 115-225 HP (Replaces 35-853333T, 35-853333, Sierra 18-7997) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
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Fuel Filter for Mercury Mariner DFI 115-225 HP (Replaces 35-853333T...
Fuel Filter for Mercury Mariner DFI 115-225 HP (Replaces 35-853333T, 35-853333, Sierra 18-7997) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket fuel filter is designed for specified Mercury Mariner DFI outboard applications from 115 to 225 HP. It replaces the listed Mercury Marine fuel-filter references and is intended for direct replacement when the engine model, year range, and serial-number application match.
The company application data identifies this product as a single fuel filter, not a multi-piece kit. Always compare the existing filter and verify the complete engine application before ordering.
- Replacement fuel filter for selected Mercury Mariner DFI outboards.
- Applicable to the 2.5L DFI models listed below where specified.
- Single replacement filter supplied.
- Aftermarket replacement; not manufactured or branded by Mercury Marine.
Part Number Matrix
Use these manufacturer and aftermarket references to compare the replacement filter with your existing part.
| Brand | Part Number | Reference Type |
|---|---|---|
| Mercury Marine | 35-853333 | OEM reference |
| Mercury Marine | 35-853333T | OEM reference |
| Sierra | 18-7997 | Aftermarket reference |
| Mallory Marine | 9-57725 | Aftermarket reference |
Engine & Model Compatibility
Compatibility must be confirmed using the complete engine model and year or serial-number range. The following applications are listed for this fuel filter:
| Brand | Engine Model | Displacement | Rated HP | Year or Year Range | Fuel System |
|---|---|---|---|---|---|
| Mercury Mariner | V115 DFI | 2.5L | 115 | 2000 | Direct Fuel Injection |
| Mercury Mariner | V-135 DFI | 2.5L | 135 | 1998 and newer | Direct Fuel Injection |
| Mercury Mariner | V-150 DFI | 2.5L | 150 | 1998 and newer | Direct Fuel Injection |
| Mercury Mariner | V-175 DFI | 2.5L | 175 | 2001 and newer | Direct Fuel Injection |
| Mercury Mariner | 200 DFI | Not specified | 200 | 1998-2002 | Direct Fuel Injection |
| Mercury Mariner | 225 DFI | Not specified | 225 | 1998-2002 | Direct Fuel Injection |
Important: The listed applications include different model and year conditions. A general horsepower match alone does not confirm fitment. Check the engine label, serial number, existing filter, and part number before installation.
Technical Specs
- Product Type
- Fuel filter
- Product Configuration
- Single replacement filter
- Fuel System
- Direct Fuel Injection applications listed above
- Brand Application
- Mercury Mariner
- Rated Engine Range
- 115-225 HP, subject to the listed model and year conditions
- Installation
- Replacement component; verify orientation and connections before fitting
- OEM References
- 35-853333 and 35-853333T
What’s in the Box
- 1 x Fuel Filter
Installation Notes
- Run the engine only as directed by the manufacturer, then switch it off and allow it to cool.
- Disconnect the battery and follow the engine manufacturer’s procedure for relieving fuel-system pressure before opening the fuel system.
- Place an approved container or absorbent material beneath the filter to catch residual fuel.
- Note the original filter orientation and hose or fitting locations before removal.
- Remove the old filter using the appropriate procedure and tools for your engine model.
- Install the replacement filter in the same flow direction and secure all connections correctly.
- Inspect for leaks before operating the engine. Do not operate the engine if fuel leakage is present.
Fuel-system service can involve flammable fuel and pressure. Consult the engine service manual or use a qualified marine technician if you are not trained to perform this work.
Troubleshooting & FAQ
How do I confirm this fuel filter fits my Mercury Mariner?
Match the complete engine model and year or serial-number condition against the compatibility table. Also compare the existing filter with Mercury Marine reference 35-853333 or 35-853333T, or with aftermarket reference Sierra 18-7997.
Is this an air filter?
No. This listing is for a fuel filter. It does not replace an air filter and should not be installed in an air-intake housing.
Does this listing include a kit or multiple filters?
No. The matching company record identifies the product as a single filter. The package includes one fuel filter.
What part numbers does this filter replace?
The listed replacement references are Mercury Marine 35-853333 and 35-853333T, Sierra 18-7997, and Mallory Marine 9-57725. Confirm the application and physical match before purchase.
What are common signs of a restricted fuel filter?
Possible symptoms can include hesitation, loss of power, difficult starting, rough running, or reduced engine performance. These symptoms can have other causes, so diagnose the complete fuel system before replacing parts.
Can I install the filter without relieving fuel pressure?
No. Follow the manufacturer’s fuel-pressure relief and safety procedures before opening the fuel system. Fuel may be flammable and may remain under pressure.
Is this a genuine Mercury Marine part?
No. This is an aftermarket replacement fuel filter that references the listed Mercury Marine part numbers for application and comparison.
Shipping speed and cost
Shipping options, delivery estimates, and costs are shown at checkout and may vary by destination and service selected.
Warranty and returns
Warranty coverage and return eligibility are governed by the applicable store policy. Contact support with your order details before returning or installing a suspected defective part.
Safety & Important Info
- Verify the engine model, year or serial-number range, and filter references before ordering.
- This product is a fuel-system component. Work in a well-ventilated area away from sparks, flames, and ignition sources.
- Do not operate the engine if fuel leakage is found after installation.
- This is an aftermarket replacement, not a genuine Mercury Marine component.
- Professional installation is recommended for fuel-system service.
About Sea Sierra
- Marine Replacement Parts — We supply aftermarket parts for common marine service and repair applications.
- Application-Focused Listings — Product information is organized around manufacturer references and engine fitment details.
- Support When You Need It — Contact our support team if you need help comparing the listed application with your engine information.
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