In-Line Fuel Filter for Mercury/Mariner 4-Stroke and Yamaha 2-/4-Stroke Outboards – Replaces Mercury 35-80365M and Yamaha 646-24251-02-00
In-Line Fuel Filter for Mercury/Mariner 4-Stroke and Yamaha 2-/4-Stroke Outboards – Replaces Mercury 35-80365M and Yamaha 646-24251-02-00 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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In-Line Fuel Filter for Mercury/Mariner 4-Stroke and Yamaha 2-/4-St...
In-Line Fuel Filter for Mercury/Mariner 4-Stroke and Yamaha 2-/4-Stroke Outboards – Replaces Mercury 35-80365M and 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 is an aftermarket replacement for selected Mercury/Mariner and Yamaha outboard fuel systems. It installs in the fuel line to help reduce contamination reaching the engine and is listed as a replacement for Mercury part number 35-80365M and Yamaha part number 646-24251-02-00.
The filter is identified in aftermarket catalogs as Sierra 18-7713. Confirm the engine model, stroke, year, serial-number range, hose size, and the original filter before ordering. Catalog references are application-specific; a part-number match alone does not confirm every engine configuration.
- Compact external, in-line fuel-filter design.
- For gasoline outboard fuel systems.
- Barbed hose connections for installation in a compatible fuel line.
- Helps capture fuel-system contaminants before they reach sensitive engine components.
Part Number Matrix
Use the following references to compare the filter with the part installed on your engine.
| Brand or source | Reference | Reference type |
|---|---|---|
| Mercury | 35-80365M | OEM replacement reference |
| Yamaha | 646-24251-02-00 | OEM replacement reference |
| Sierra | 18-7713 | Aftermarket cross-reference |
Engine & Model Compatibility
The applications below are the engine families and conditions associated with the referenced filter in the available catalog data. Always verify the complete model designation and serial-number range against your engine documentation.
| Brand | Model or family | Rated HP | Stroke | Year or serial condition | Reference |
|---|---|---|---|---|---|
| Mercury/Mariner | 9.9 4-Stroke | 9.9 | 4-Stroke | 1995–1998 | 35-80365M |
| Mercury/Mariner | 15 4-Stroke | 15 | 4-Stroke | 1998 and later | 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 |
Important: The available references do not establish universal fitment for every 4–15 HP Mercury/Mariner model or every Yamaha 4–9.9 HP model. Some catalogs list the same number as an internal strainer or fuel-pump component under other engine configurations. Verify the application before installation.
Technical Specifications
- Product type
- In-line fuel filter
- Installation
- External installation in a compatible fuel line
- Fuel type
- Gasoline
- Connection
- Barbed hose inlet and outlet; verify hose size against the original filter before installation
- Housing
- Compact plastic filter housing
- Flow direction
- Install according to the flow arrow on the filter
What's in the Box
- 1 x In-line fuel filter
Installation Notes
- Turn the engine off, allow it to cool, and work in a well-ventilated area away from ignition sources.
- Shut off the fuel supply where applicable and disconnect the battery if required by the engine manufacturer.
- Place an approved container or absorbent material beneath the filter to catch fuel.
- Note the flow direction and hose routing before removing the old filter.
- Remove the hose clamps, disconnect the fuel hoses, and take out the old filter.
- Install the replacement with the flow arrow pointing from the fuel tank toward the engine.
- Reconnect the hoses and secure the clamps without overtightening.
- Restore the fuel supply and prime the system if the engine uses a primer bulb.
- Inspect every connection for leaks before and after starting the engine.
Troubleshooting & FAQ
How do I confirm fitment?
Compare the original filter and part number with the Part Number Matrix, then verify the complete engine model, horsepower, stroke, year, and serial-number range. If any condition differs, confirm the application before ordering.
What symptoms can a restricted fuel filter cause?
A restricted filter may contribute to hard starting, stalling, poor acceleration, or loss of power. These symptoms can also have other causes, so inspect the complete fuel system before replacing parts.
How often should the filter be replaced?
Replace the filter according to the engine manufacturer's maintenance schedule, or sooner if it is contaminated, damaged, restricted, or if fuel flow is poor. Inspect it whenever fuel-system service is performed.
Is this an OEM filter?
No. This is an aftermarket replacement filter. Mercury, Yamaha, and other brand names and part numbers are used only to identify reference applications and compatibility.
Does the package include hose clamps or fuel hose?
No. The package contains one in-line fuel filter only. Reuse or replace clamps and hose separately as required by the engine manufacturer's service instructions.
Safety & Important Information
- Fuel is flammable. Do not smoke or work near flames, sparks, hot surfaces, or other ignition sources.
- Use fuel-system-compatible hose and clamps suitable for the application.
- Do not install this filter in an oil line or in an application requiring a different filter style, hose size, or flow capacity.
- Check for leaks carefully before operating the boat.
- Professional installation is recommended if you are not familiar with marine fuel systems.
About Sea Sierra
- Marine replacement parts — Practical aftermarket components for routine maintenance and repair.
- Application-focused selection — Compare part numbers and engine conditions before ordering.
- Support when needed — Provide the complete engine model and serial information when requesting fitment assistance.
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