Marine Oil Filter – Fits Mercury & Yamaha Outboards (Replaces 825467A1, 825467T1, 6G8-13440-00-00)
Marine Oil Filter – Fits Mercury & Yamaha Outboards (Replaces 825467A1, 825467T1, 6G8-13440-00-00) is backordered and will ship as soon as it is back in stock.
Couldn't load pickup availability
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
Marine Oil Filter – Fits Mercury & Yamaha Outboards (Replaces 8...
Product Details
This high-efficiency Marine Oil Filter – Fits Mercury & Yamaha Outboards (Replaces 825467A1, 825467T1, 6G8-13440-00-00) is engineered for reliable performance in harsh marine environments. It offers precise fitment for Mercury 4-Stroke 8–9.9 HP outboards from 2004 to present and early model Yamaha 4-Stroke 9.9 HP outboards.
It serves as a direct interchange for several part numbers, including Sierra 18-7901, Mercury 825467A1, 825467T1, 825467T02, and Yamaha 6G8-13440-00-00.
- Features a user-friendly spin-on installation design.
- Epoxy-coated steel canister provides superior corrosion resistance.
- Heavy-walled housing ensures durability and long service life.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Sierra | 18-7901 |
| Mercury | 825467A1 |
| Mercury | 825467T1 |
| Mercury | 825467T02 |
| Yamaha | 6G8-13440-00-00 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Mercury/Mariner owners: This filter fits 8 HP and 9.9 HP four-stroke models manufactured from 2004 onwards.
For Yamaha owners: This filter is compatible with 9.9 HP four-stroke models produced up to approximately 2012.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | F8/F9.9 | 8-9.9 | 4-Stroke | 2004–present | 825467A1/825467T1/825467T02 | |
| Yamaha | F9.9 | 9.9 | 4-Stroke | Up to 2012 | 6G8-13440-00-00 |
Technical Specs
- Product Type
- Oil Filter
- Installation
- Spin-On
- Filtration Rating
- High-efficiency (meets OE specifications)
- Connection
- Threaded
- Housing Material
- Steel (epoxy coated)
- Housing Color
- Black/Gray
- Dimensions
- 9.9 × 9.9 × 9.9 mm (0.39 × 0.39 × 0.39 in)
- Weight
- 0.06 kg (0.13 lb)
- Fitting Type
- Spin-On
- Thread Size
- M16 × 1.5
- Warranty
- Limited Lifetime (Sierra)
- Other Technical Attributes
- Epoxy coated for corrosion resistance; heavy-walled steel canister for long life
What’s in the Box
- 1 x Oil Filter (Sierra 18-7901)
Installation Notes
- Place an oil drain pan beneath the existing oil filter to catch any spills.
- Using an appropriate oil filter wrench, turn the old filter counter-clockwise to loosen and remove it.
- Wipe the engine's filter mounting surface clean with a lint-free cloth, ensuring the old gasket is not stuck to it.
- Lightly coat the gasket of the new filter with a thin film of fresh engine oil.
- Carefully screw the new filter onto the threaded mount by hand until the gasket makes contact with the mounting surface.
- Tighten the filter an additional three-quarters to one full turn by hand. Do not overtighten.
- After refilling the engine with oil, run it for a few minutes and carefully inspect for any leaks around the filter.
Troubleshooting & FAQ
How do I confirm this filter fits my specific outboard model?
The surest way is to check your current filter for a part number. Cross-reference that number with those listed in our Part Number Matrix. You can also consult the Engine & Model Compatibility table to see if your engine's HP, stroke, and year range are listed.
What is the recommended replacement interval for this oil filter?
As a best practice, replace your oil filter every time you change your engine oil. This is typically recommended every 100 hours of operation or at least once per season, whichever comes first. Refer to your engine's service manual for specific guidance.
What are the signs of a clogged or failing oil filter?
Symptoms of a failing oil filter can include a drop in oil pressure, engine sputtering or poor performance, and unusual metallic noises from the engine. If you notice these signs, check and replace your filter and oil immediately.
Is this filter compatible with synthetic and conventional oils?
Yes, this filter is designed to work effectively with all major brands of conventional and synthetic 4-stroke marine engine oils.
Do I need a special tool to install this filter?
You will likely need a standard oil filter wrench to remove the old filter, as it can be tight. The new filter should be tightened by hand, but a wrench can provide the final quarter-turn if you cannot achieve a firm grip.
OEM vs. Aftermarket?
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.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
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
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
