Marine Oil Filter Replacement for Yamaha F8, F9.9 & FT9.9 4-Stroke Outboards
Marine Oil Filter Replacement for Yamaha F8, F9.9 & FT9.9 4-Stroke Outboards is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Marine Oil Filter Replacement for Yamaha F8, F9.9 & FT9.9 4-Str...
Marine Oil Filter Replacement for Yamaha F8, F9.9 & FT9.9 4-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Marine Oil Filter is designed for selected Yamaha four-stroke outboards. According to the product fitment information, it is intended for Yamaha F8 models from 1990–1999 and Yamaha F9.9 and FT9.9 models from 1990–2005.
The filter is listed as an aftermarket replacement reference for Yamaha 6G8-13440-00 and 6G8-13440-00-00. The aftermarket reference is 18-7901. Mercury Marine reference numbers 825467A1, 825467T1, and 825467T02 are also associated with this replacement reference; confirm the exact engine application and original part number before ordering.
- Replacement oil filter for selected Yamaha outboards.
- Suitable for the listed F8, F9.9, and FT9.9 four-stroke applications.
- Supplied as one individual filter.
Part Number Matrix
Use the references below to compare the filter with the part installed on your engine. Part-number correspondence does not replace confirmation of the complete model and year fitment.
| Reference Type | Part Number |
|---|---|
| Aftermarket reference | 18-7901 |
| Yamaha OEM reference | 6G8-13440-00 |
| Yamaha OEM reference | 6G8-13440-00-00 |
| Mercury Marine reference | 825467A1 |
| Mercury Marine reference | 825467T1 |
| Mercury Marine reference | 825467T02 |
Engine & Model Compatibility
Check your engine brand, model, horsepower, stroke type, and model year before purchasing. The confirmed company fitment for this product is shown below.
| Brand | Model | Rated HP | Stroke | Model Years | OEM Reference | Application Notes |
|---|---|---|---|---|---|---|
| Yamaha | F8 | 8 HP | 4-Stroke | 1990–1999 | 6G8-13440-00 | Confirm the complete engine model designation before ordering. |
| Yamaha | F9.9 | 9.9 HP | 4-Stroke | 1990–2005 | 6G8-13440-00 | Confirm the complete engine model designation before ordering. |
| Yamaha | FT9.9 | 9.9 HP | 4-Stroke | 1990–2005 | 6G8-13440-00 | Confirm the complete engine model designation before ordering. |
Technical Specs
- Product Type
- Oil Filter
- Part Format
- Individual replacement filter
- Aftermarket Reference
- 18-7901
- Primary Listed Brand Application
- Yamaha Outboard
- Confirmed Stroke Application
- 4-Stroke
- Confirmed Yamaha OEM Reference
- 6G8-13440-00
- Alternate Yamaha Reference
- 6G8-13440-00-00
- Associated Mercury Marine References
- 825467A1, 825467T1, 825467T02
What’s in the Box
- 1 x Oil filter
Installation Notes
- Confirm that the replacement filter matches the original filter and the references listed above.
- Run the engine only as recommended by the engine manufacturer before servicing, then allow hot components and oil to cool as appropriate.
- Place a suitable drain pan beneath the filter area to catch oil.
- Remove the old filter using the appropriate removal method for the engine and filter design.
- Clean the filter mounting area and make sure the old sealing gasket, if fitted, has been removed.
- Prepare and install the replacement filter according to the Yamaha service manual for your exact engine model.
- Refill or check the engine oil as required by the service manual.
- Start the engine briefly, inspect the filter area for leaks, and recheck the oil level before normal operation.
Troubleshooting & FAQ
How do I confirm this filter fits my outboard?
Compare your engine's brand, complete model designation, horsepower, four-stroke configuration, and model year with the compatibility table. Also compare the original filter or service-manual reference with 18-7901, 6G8-13440-00, or 6G8-13440-00-00.
Does this listing fit every Yamaha F8, F9.9, or FT9.9 engine?
No. The confirmed company fitment is Yamaha F8 four-stroke models from 1990–1999 and Yamaha F9.9 and FT9.9 four-stroke models from 1990–2005. Verify the exact model and year before ordering.
Are Mercury references included as fitment confirmation?
The Mercury Marine references 825467A1, 825467T1, and 825467T02 are associated with the listed aftermarket replacement reference. The available product fitment data specifically confirms the Yamaha applications shown above, so Mercury owners should verify the exact engine application and original filter reference before purchase.
When should the oil filter be replaced?
Replace the oil filter at the interval specified in the service manual for your exact outboard. Many maintenance schedules call for filter replacement during an oil change, but the manufacturer's schedule takes priority.
Is this an OEM filter?
No. This is an aftermarket replacement filter. Yamaha and Mercury reference numbers are provided for identification and cross-reference purposes only.
What is included with the purchase?
The package contains one individual oil filter. No additional filter, gasket, wrench, or installation tool is specified as included.
Do I need a special tool to install it?
Tool requirements depend on the original filter and the engine installation. Use the procedure and tools specified in the service manual for your exact model.
Safety & Important Info
- Verify the complete engine model, year, stroke type, and original filter reference before ordering.
- Do not rely on horsepower alone to determine compatibility.
- Follow the engine manufacturer's service instructions for oil type, oil quantity, tightening procedure, and replacement interval.
- This is an aftermarket replacement, not an OEM component.
- Dispose of used oil and the old filter in accordance with local environmental regulations.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for a range of marine applications.
- Application-Focused Listings — Product references and available fitment information are provided to support part identification.
- Customer Support — Compare your original part and complete engine details before ordering when application-specific confirmation is required.
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