Oil Filter – Fits Mercury/Mariner Outboard 25HP–300HP (Replaces Mercury Marine 35-877761K01)
Oil Filter – Fits Mercury/Mariner Outboard 25HP–300HP (Replaces Mercury Marine 35-877761K01) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
Worry-free returns
You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Delivery and Shipping
Delivery and Shipping
Free standard shipping on all orders under 1 KG
Oil Filter – Fits Mercury/Mariner Outboard 25HP–300HP (Replaces Mer...
Product Details
This Oil Filter is designed for a wide range of Mercury and Mariner 4-Stroke outboards from 25HP to 300HP, fitting various models manufactured between 2007 and 2023. It ensures reliable engine protection and performance by filtering harmful contaminants from the oil.
It is a direct replacement for Mercury Marine part number 35-877761K01 and also supersedes older part numbers 35-877761004 and 35-8M0065103.
- Features a simple engine-mounted, spin-on installation process.
- Built with an anti-drain back valve and a bypass valve for consistent oil pressure and flow.
- Provides fine filtration down to 28 microns to protect internal engine components.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury Marine | 35-877761004 | Superseded by 35-877761K01 |
| Mercury Marine | 35-8M0065103 | Superseded by 35-877761K01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This filter is compatible with the following Mercury Marine outboard models.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury Marine | F25 EFI (3 & 4 cyl.) | 25 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 30 EFI (3 & 4 cyl.) | 30 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 40 EFI (3 & 4 cyl.) | 40 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 50 EFI | 50 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 60 EFI | 60 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 75 FourStroke | 75 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 80 FourStroke | 80 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 90 FourStroke | 90 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 100 FourStroke | 100 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 115 EFI | 115 | 4-Stroke | 2007–2023 | 35-877761K01 | |
| Mercury Marine | 150 FourStroke | 150 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | 175DTS | 175 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | 200DTS | 200 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | 225DTS | 225 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | 250DTS | 250 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | Pro FourStroke | 250 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | 300DTS | 300 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | Verado | 250 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | Verado | 275 | 4-Stroke | 2007–2018 | 35-877761K01 | |
| Mercury Marine | Verado | 300 | 4-Stroke | 2007–2018 | 35-877761K01 |
Technical Specs
- Product Type
- Oil Filter
- Installation
- Engine-mounted, spin-on
- Filtration Rating
- 28 microns
- Fuel Type
- Gasoline
- Connection
- Threaded
- Housing Material
- Steel
- Housing Color
- Black
- Dimensions
- Height: 76.2 mm (3 in), Width: 266.7 mm (10.5 in), Length: 279.4 mm (11 in)
- Weight
- 0.22 kg (0.48 lb)
- Fitting Type
- Spin-on
- Thread Size
- 13/16"-16 UNF
- Other Technical Attributes
- Anti-drain back valve, bypass valve
What’s in the Box
- 1 x Oil Filter (35-877761K01)
Installation Notes
- Before you begin, make sure the engine is cool and place a drain pan under the old filter to catch any oil.
- Using an appropriate filter wrench, unscrew and remove the old oil filter. Turn it counter-clockwise.
- With a clean cloth, wipe the filter mounting base on the engine clean. Ensure the surface is free of old gasket residue and debris.
- Lightly lubricate the gasket of the new filter with a thin film of clean engine oil.
- Carefully spin the new filter on by hand until the gasket makes contact with the engine mounting surface.
- Tighten the filter an additional 3/4 to one full turn by hand. Do not use a wrench to tighten, as this can cause damage.
- After installation, run the engine for a few minutes and carefully check for any leaks around the filter seal.
- Turn the engine off, wait several minutes for the oil to settle, and re-check the engine oil level, topping off if necessary.
Troubleshooting & FAQ
How do I know if this oil filter fits my engine?
This filter fits a wide range of Mercury and Mariner 4-stroke outboards from 25HP to 300HP (2007-2023). Please check the "Engine & Model Compatibility" table on this page to confirm your specific model and year before ordering.
What is the filtration rating of this filter?
This filter has a filtration rating of 28 microns, designed to effectively capture harmful contaminants and protect your engine according to manufacturer specifications.
What is the correct replacement interval for this oil filter?
We recommend changing the oil filter with every oil change, or at least once per season (or every 100 hours of use), as specified in your engine's service manual.
What are the signs of a failing oil filter?
Signs of a clogged or failing oil filter can include low oil pressure warnings from your gauge or monitoring system, a noticeable decrease in engine performance, or unusually dirty exhaust smoke. If you suspect an issue, inspect or replace the filter immediately.
What does the anti-drain back valve do?
The anti-drain back valve is a critical feature that prevents oil from draining out of the filter and engine's oil galleries when the engine is off. This ensures a quicker supply of oil on startup to reduce engine wear.
Is this a spin-on type filter?
Yes, this is an engine-mounted, spin-on oil filter designed for straightforward removal and installation.
Is this an OEM or aftermarket part?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
How much is shipping and how long does it take?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
What is the warranty and return policy?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, 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 in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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