In-line Fuel Filter – Fits Mercury/Mariner 4-Stroke 4–15 HP, Yamaha 6–9.9 HP (Replaces Mercury 35-80365M, Yamaha 646-24251-02-00)
In-line Fuel Filter – Fits Mercury/Mariner 4-Stroke 4–15 HP, Yamaha 6–9.9 HP (Replaces Mercury 35-80365M, Yamaha 646-24251-02-00) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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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.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
In-line Fuel Filter – Fits Mercury/Mariner 4-Stroke 4–15 HP, Yamaha...
In-line Fuel Filter – Fits Mercury/Mariner 4-Stroke 4–15 HP, Yamaha 6–9.9 HP (Replaces Mercury 35-80365M, Yamaha 646-24251-02-00) is backordered and will ship as soon as it is back in stock.
Product Details
This In-line Fuel Filter – Fits Mercury/Mariner 4-Stroke Outboards 4–15 HP (Replaces 35-80365M) is an essential component for maintaining fuel system health in various Mercury/Mariner and Yamaha outboards. It is designed for specific 4-stroke Mercury/Mariner models from 4 HP to 15 HP (1995–2005) and select Yamaha 2-stroke and 4-stroke outboards from 4 HP to 9.9 HP (1988–2002).
This filter serves as a direct interchange for Mercury part numbers 35-80365M and 80365; Yamaha 646-24251-02-00 and 646-24251-01-00; and Sierra 18-7713.
- Features a compact design for external, inline fuel line installation.
- Equipped with 1/4" hose barb connections for simple setup.
- Functions as an effective oil and fuel strainer to protect your engine from contaminants.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Mercury | 35-80365M |
| Mercury | 80365 |
| Yamaha | 646-24251-02-00 |
| Yamaha | 646-24251-01-00 |
| Sierra | 18-7713 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
This filter fits a range of Mercury and Mariner 4-stroke outboards from 4 HP to 15 HP, primarily from the mid-1990s to mid-2000s.
Compatible Yamaha models include select 2-stroke and 4-stroke outboards from 4 HP to 9.9 HP, covering various years from the late 1980s to the early 2000s.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | 9.9 (232cc) | 9.9 | 4-Stroke | 1995–1998 | 35-80365M | |
| Mercury | 15 (4-Stroke) | 15 | 4-Stroke | 1998–2005 | 35-80365M | |
| Mercury | 9.9 (323cc) | 9.9 | 4-Stroke | 1999–2005 | 35-80365M | |
| Mercury | 8 BODENSEE (International) | 8 | 4-Stroke | 1995–2005 | 35-80365M | |
| Mercury | 13.5 (International) | 13.5 | 4-Stroke | 1999–2005 | 35-80365M | |
| Mercury | 2A | 2 | 4-Stroke | 1977–1978 | 35-80365M | |
| Mercury | 8A | 8 | 4-Stroke | 1977–1987 | 35-80365M | |
| Mercury | 8K | 8 | 4-Stroke | 1985–1998 | 35-80365M | |
| Mercury | 6C/8C | 6/8 | 4-Stroke | 1984–1986 | 35-80365M | |
| Mercury | 6D | 6 | 4-Stroke | 1978–1986 | 35-80365M | |
| Yamaha | 6 | 6 | 2-Stroke | 1989, 1992–1999 | 646-24251-02-00 | |
| Yamaha | 8 | 8 | 2-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
- In-Line Fuel Filter
- Installation
- External, inline fuel line installation
- Fuel Type
- Gasoline
- Connection
- 1/4" hose barb inlet/outlet
- Housing Material
- Plastic
- Housing Color
- White
- Fitting Type
- Barbed
- Thread Size
- N/A (barbed connection)
- Other Technical Attributes
- Oil/fuel strainer; compact in-line design
What’s in the Box
- 1 x Inline Fuel Filter (Replaces 35-80365M)
Installation Notes
- Ensure the engine is off and cool, and the work area is well-ventilated. Disconnect the boat's battery.
- Turn off the fuel supply valve.
- Place a suitable container or absorbent rags beneath the old filter to catch any spilled fuel.
- Using appropriate tools, loosen the clamps securing the fuel lines to the filter.
- Carefully detach the fuel lines and remove the old filter. Note the direction of the flow arrow on the old filter.
- Position the new filter, making sure its flow arrow points in the direction of fuel flow (from the tank towards the engine).
- Reconnect the fuel lines and securely tighten the clamps. Do not overtighten.
- Turn the fuel supply back on and check thoroughly for any leaks at the connections.
- If your engine has a primer bulb, squeeze it until it feels firm to prime the system.
- Reconnect the battery, start the engine, and check again for leaks.
Troubleshooting & FAQ
How do I find the right filter for my engine?
To ensure a perfect match, always compare your original part's number against our Part Number Matrix. Additionally, check your engine's model and year in the Engine & Model Compatibility table. If you are unsure, contact us with your engine details before ordering.
What are the signs of a failing fuel filter?
A clogged or failing fuel filter can cause several issues, including the engine struggling to start, stalling at low speeds, poor acceleration, or a general loss of power. If you notice these symptoms, the fuel filter is a common and affordable part to inspect and replace.
How often should this filter be replaced?
For general recreational use, it's best practice to replace your inline fuel filter at least once per season, or every 100 hours of engine operation, whichever comes first. This preventative maintenance helps protect sensitive fuel system components from debris.
Is this filter different from the OEM part?
This is an aftermarket part designed to meet or exceed OEM specifications for fit and function, but it may have minor cosmetic differences. It offers a reliable, cost-effective alternative to the OEM component.
Is this an OEM part?
This listing is for a high-quality aftermarket replacement, not an original equipment manufacturer (OEM) part. It is built to meet or exceed OEM-level specifications with comparable materials, manufactured in an ISO 9002 certified facility, and batch-inspected for quality and consistency.
What are the shipping speed and cost?
We ship worldwide, and most orders are delivered within 5–15 days. Standard shipping is free for most destinations. If expedited shipping is available for your location, the options and costs will be displayed at checkout.
What is the warranty and return policy?
This product is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter an issue, please contact our support team with your order details. Returns are accepted within our standard policy window for items that are unused and in their original packaging. Please see our full policy page or contact us 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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