Inline Fuel Filter – Fits Mercury/Mariner 4-Stroke 9.9-15 HP (Replaces 35-80365M)
Inline Fuel Filter – Fits Mercury/Mariner 4-Stroke 9.9-15 HP (Replaces 35-80365M) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Inline Fuel Filter – Fits Mercury/Mariner 4-Stroke 9.9-15 HP (Repla...
Inline Fuel Filter – Fits Mercury/Mariner 4-Stroke 9.9-15 HP (Replaces 35-80365M) is backordered and will ship as soon as it is back in stock.
Product Details
This Inline Fuel Filter is designed for a range of 4-stroke outboard motors, including Mercury/Mariner 9.9–15 HP (1995–2004) and Yamaha 6–9.9 HP (1989–2002) models. It ensures clean fuel delivery by filtering out contaminants before they reach the engine, protecting critical components.
It serves as a direct cross-reference for Mercury 35-80365M; Yamaha 646-24251-02-00, 646-24251-01-00, and 646-24251-00-00; Sierra 18-7713; and Tohatsu 369-02230-0.
- Simple in-line installation with 1/4" hose barbs.
- Durable white plastic housing suitable for marine environments.
- Engineered for use with gasoline fuel systems.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 35-80365M |
| Yamaha | 646-24251-02-00 |
| Yamaha | 646-24251-01-00 |
| Yamaha | 646-24251-00-00 |
| Sierra | 18-7713 |
| Tohatsu | 369-02230-0 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Fits various Mercury, Mariner, and Yamaha 4-stroke models. Please check your specific engine's part number to ensure a correct fit.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Mercury | 9.9 HP (232cc) | 9.9 | 4-Stroke | 1995–1998 | 35-80365M |
| Mercury | 9.9 HP (323cc) | 9.9 | 4-Stroke | 1999–2004 | 35-80365M |
| Mercury | 15 HP (323cc) | 15 | 4-Stroke | 1998-Up | 35-80365M |
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. |
|---|---|---|---|---|---|
| Yamaha | 6 HP | 6 | 4-Stroke | 1989, 1992-1999 | 646-24251-02-00 |
| Yamaha | 8 HP | 8 | 4-Stroke | 1989-1999, 2001-2002 | 646-24251-02-00 |
| Yamaha | F4 | 4 | 4-Stroke | 1999-2002 | 646-24251-02-00 |
| Yamaha | F9.9 | 9.9 | 4-Stroke | 1989-1995, 1997-1999, 2001-2002 | 646-24251-02-00 |
| Yamaha | FT9.9 | 9.9 | 4-Stroke | 1988-1990 | 646-24251-02-00 |
Technical Specs
- Product Type
- Inline Fuel Filter
- Installation
- In-line
- Fuel Type
- Gasoline
- Connection
- 1/4" hose
- Housing Material
- Plastic
- Housing Color
- White
- Fitting Type
- Hose barb
- Product Height
- 5.0"
- Product Width
- 10.0"
- Product Length
- 12.0"
What’s in the Box
- 1 x Inline Fuel Filter (Replaces 35-80365M / 646-24251-02-00)
Installation Notes
- Ensure the engine is off and cool. Relieve pressure from the fuel line if applicable.
- Place a rag under the old filter to catch any fuel drips.
- Note the fuel flow direction indicated by an arrow on the old filter.
- Loosen the clamps on the fuel hoses connected to the filter and slide them off.
- Gently twist and pull the hoses off the old filter.
- Install the new filter, ensuring the flow arrow points in the correct direction (towards the engine).
- Slide the fuel hoses onto the new filter and secure them with the clamps.
- Prime the fuel system if required by your engine manufacturer.
- Start the engine and check for any leaks around the new filter and connections.
Troubleshooting & FAQ
How do I know if this fuel filter will fit my engine?
This filter is designed for specific Mercury, Mariner, and Yamaha models listed in the compatibility tables. The best way to confirm fitment is to match your existing part number to one of the cross-reference numbers provided (e.g., 35-80365M or 646-24251-02-00).
What are the signs of a clogged or failing fuel filter?
Common symptoms include engine hesitation or stumbling, difficulty starting, rough idling, reduced power, or stalling, especially under load. If you experience these issues, a clogged fuel filter is a likely cause.
How often should I replace my outboard's fuel filter?
For most outboard engines, it is recommended to replace the fuel filter annually or every 100 hours of operation, whichever comes first. Consult your engine's service manual for the specific maintenance interval.
Is there a difference in quality between this and an OEM filter?
This is an aftermarket part designed to meet or exceed OEM specifications. It is manufactured in an ISO 9001 certified facility and undergoes quality control inspections to ensure performance and reliability comparable to the original part.
Can I install this filter myself?
Yes, replacing an inline fuel filter is a relatively straightforward task for those with basic mechanical skills. However, always follow safety precautions when working with fuel systems. If you are not confident, professional installation is recommended.
What happens if I install the filter backward?
Installing the filter in the reverse direction will restrict or block fuel flow, causing the engine to run poorly or not at all. Always ensure the arrow on the filter housing points in the direction of fuel flow (from the tank to the engine).
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.
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