Air Filter – Fits Mercury Outboard 115-225 HP V6 Engines (Replaces 35-853333T, 18-7997)
Air Filter – Fits Mercury Outboard 115-225 HP V6 Engines (Replaces 35-853333T, 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.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
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Air Filter – Fits Mercury Outboard 115-225 HP V6 Engines (Replaces ...
Air Filter – Fits Mercury Outboard 115-225 HP V6 Engines (Replaces 35-853333T, 18-7997) is backordered and will ship as soon as it is back in stock.
Product Details
This high-performance Air Filter – Fits Mercury Outboard 115-225 HP V6 Engines is essential for protecting your engine from airborne contaminants. Designed for a precise fit, it is compatible with a range of Mercury Marine 115-225 HP 2-Stroke DFI/OptiMax V6 engines from 1998–2002 and later models, ensuring optimal airflow and engine efficiency.
This filter serves as a direct interchange for several OEM and aftermarket part numbers, including Mercury Marine 35-853333T, Sierra 18-7997, HeuroFosh 853333T, and FridayParts 35-853333T.
- Engineered for simple, direct replacement drop-in installation.
- Designed specifically for DFI (Direct Fuel Injection) engines.
- Helps maintain engine performance and fuel economy by ensuring clean airflow.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury Marine | 35-853333T |
| Mercury Marine | 853333T |
| Mercury Marine | 35-853333 |
| Mercury Marine | 853333 |
| Sierra | 18-7997 |
| HeuroFosh | 853333T |
| FridayParts | 35-853333T |
| JLM Marine | JLM Marine Air Filter |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This air filter is designed for a wide range of Mercury Marine and Mercury DFI, OptiMax, and Jet Drive V6 engines. Verify your specific model and serial number where applicable to ensure correct fitment.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | V-115 DFI (2.5L) | 115 | 2-Stroke | 2000 | 35-853333T | V6 engine |
| Mercury | V-135 DFI (2.5L) | 135 | 2-Stroke | 1998 & Up | 35-853333T | V6 engine |
| Mercury | V-150 DFI (2.5L) | 150 | 2-Stroke | 1998 & Up | 35-853333T | V6 engine |
| Mercury | V-175 DFI (2.5L) | 175 | 2-Stroke | 2001 & Up | 35-853333T | V6 engine |
| Mercury | 200 DFI | 200 | 2-Stroke | 1998–2002 | 35-853333T | V6 engine |
| Mercury | 225 DFI | 225 | 2-Stroke | 1998–2002 | 35-853333T | V6 engine |
Technical Specs
- Product Type
- Air Filter Element
- Installation
- Direct replacement drop-in
- Fuel Type
- Gasoline
- Connection
- Direct fit to air box
- Housing Color
- White
- Dimensions
- Rectangular
- Fitting Type
- Drop-in replacement
- Compatible Engines
- For DFI (Direct Fuel Injection) engines
- Warranty
- Varies by manufacturer (typically 1 year)
What’s in the Box
- 1 x Air Filter Element (Replaces 35-853333T)
- Note: Some aftermarket packages (e.g., from HeuroFosh or XLJOY) may include 2 x Air Filter Elements. Please verify the contents of your specific purchase.
Installation Notes
- Ensure the engine is switched off and has completely cooled down before starting.
- Locate the engine's air filter housing or air box cover.
- Remove the cover, which may be secured with clips, screws, or bolts.
- Take out the old air filter element, noting its orientation.
- Wipe the inside of the air filter housing clean to remove any dust or debris.
- Insert the new air filter, making sure it is seated correctly and securely.
- Replace the air box cover and fasten it tightly.
Troubleshooting & FAQ
How do I know if this air filter fits my Mercury engine?
This filter fits a wide range of Mercury 115-225 HP DFI/OptiMax V6 engines made from 1998 onward. To confirm, please check the detailed "Engine & Model Compatibility" table and match your engine's model, horsepower, and year. When in doubt, compare the part number to 35-853333T or 18-7997.
What are the symptoms of a clogged or failing air filter?
Common signs include a noticeable drop in engine performance, difficulty starting, increased fuel consumption, rough idling, or black smoke from the exhaust. If you notice any of these, it's a good time to inspect your air filter.
How often should I replace this air filter?
For most recreational boaters, inspecting the air filter annually or every 100 hours of operation is a good practice. However, if you operate in dusty or debris-heavy environments, you should check it more frequently. Replace it whenever it appears dirty or clogged.
Is this part a direct drop-in replacement?
Yes, this air filter is designed as a direct, drop-in replacement for the original OEM part. No modifications are required for installation. Simply remove the old filter and insert the new one.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It has been built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility and batch-inspected for consistency and quality.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout where available for your location.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions, with typical transit times of 5–15 days.
- Manufacturer-Direct Value — We offer fair pricing without compromising on materials or quality control.
Payment & Security
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