Mechanical Fuel Pump – Fits Yamaha 25–90 HP, Suzuki 8–65 HP & Tohatsu/Nissan 25–115 HP 2-Stroke Outboards
Mechanical Fuel Pump – Fits Yamaha 25–90 HP, Suzuki 8–65 HP & Tohatsu/Nissan 25–115 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
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Mechanical Fuel Pump – Fits Yamaha 25–90 HP, Suzuki 8–65 HP & T...
Mechanical Fuel Pump – Fits Yamaha 25–90 HP, Suzuki 8–65 HP & Tohatsu/Nissan 25–115 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket mechanical fuel pump is designed as a replacement for selected 2-stroke Yamaha, Suzuki, Tohatsu, and Nissan outboard applications. The pump uses engine crankcase pressure pulses to deliver gasoline to the carburetor or fuel system, helping restore fuel delivery when the original pump is leaking, damaged, or no longer supplying adequate fuel.
Fitment depends on the exact engine model, year, stroke, serial range, mounting arrangement, and original part number. Use the reference numbers and compatibility information below as a guide, then compare your original pump and consult the applicable engine service manual before ordering.
- Mechanical fuel pump for selected 2-stroke outboard engines.
- OEM-style replacement design for applications using the listed reference numbers.
- Hose-barb fuel connections for compatible installations.
- Suitable for gasoline fuel systems when the application requirements match.
Part Number References
The following numbers are reference and interchange identifiers associated with this style of fuel pump. They are not a substitute for checking the complete engine application.
| Brand or source | Reference number |
|---|---|
| Yamaha | 663-24410-00, 692-24410-00 |
| Yamaha | 6A0-24410-00, 6A0-24410-01, 6A0-24410-02, 6A0-24410-03, 6A0-24410-04, 6A0-24410-05 |
| Suzuki | 15100-94300, 15100-94301, 15100-94302, 15100-94303 |
| Suzuki | 15100-94310, 15100-94311, 15100-94312 |
| Tohatsu | 356-04000-0, 356-04000-1 |
| Mallory | 9-35300, 9-35305 |
| Sierra | 18-7334 |
Reference numbers may include format or suffix variations in different catalogs. Confirm the complete number and physical configuration on your original part.
Engine Compatibility Guide
The ranges below summarize the applications associated with this listing. They are not a blanket approval for every engine within a horsepower range. Confirm the exact model and year before installation.
Yamaha 2-Stroke Applications
| Model or application | Rated horsepower | Approximate years | Stroke | Reference number |
|---|---|---|---|---|
| Standard outboard models | 25 HP | 1994 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 30 HP | 1994–1997 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 40 HP | 1984–2006 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 48 HP | 1995–2000 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 50 HP | 1984–2008 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 55 HP | 1989–2005 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 60 HP | 1991–2006 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 70 HP | 1986–2008 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 75 HP | 1994–1999 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 85 HP | 1990–1994 | 2-Stroke | 6A0-24410-00 |
| Standard outboard models | 90 HP | 1984–2009 | 2-Stroke | 6A0-24410-00 |
| Jet and commercial variants | 40–90 HP | Varies by model | 2-Stroke | Verify before ordering |
Suzuki DT and PU 2-Stroke Applications
| Model | Rated horsepower | Approximate years | Stroke | Reference number |
|---|---|---|---|---|
| DT8C | 8 HP | 1986–1998 | 2-Stroke | 15100-94300 |
| DT9.9C | 9.9 HP | 1986–1998 | 2-Stroke | 15100-94300 |
| DT20 | 20 HP | 1986–1998 | 2-Stroke | 15100-94300 |
| DT25 / DT25C | 25 HP | 1989–2000 | 2-Stroke | 15100-94300 |
| DT30 / DT30C | 30 HP | 1988–1997 | 2-Stroke | 15100-94300 |
| DT35 | 35 HP | 1987–1989 | 2-Stroke | 15100-94300 |
| DT40 / DT40C | 40 HP | 1986–1998 | 2-Stroke | 15100-94300 |
| PU40 | 40 HP | 1989–1994 | 2-Stroke | 15100-94300 |
| DT50 | 50 HP | 1986–1997 | 2-Stroke | 15100-94300 |
| DT55 | 55 HP | 1988–1997 | 2-Stroke | 15100-94300 |
| PU55 | 55 HP | 1989–1994 | 2-Stroke | 15100-94300 |
| DT60 | 60 HP | 1986–1997 | 2-Stroke | 15100-94300 |
| DT65 | 65 HP | 1988–1997 | 2-Stroke | 15100-94300 |
Tohatsu and Nissan 2-Stroke Applications
| Model family | Rated horsepower | Stroke or fuel-system note | Reference number |
|---|---|---|---|
| M25C3, NS25C3 | 25 HP | 2-Stroke | 356-04000-1 |
| M30A4, NS30A4 | 30 HP | 2-Stroke | 356-04000-1 |
| M40C, MD40B2, MD40B, NS40C and related variants | 40 HP | 2-Stroke | 356-04000-1 |
| MD50B2, MD50B, NSD50B2 and related variants | 50 HP | 2-Stroke | 356-04000-1 |
| M70C, MD70B, NS70C and related variants | 70 HP | 2-Stroke | 356-04000-1 |
| MD75C2, NSD75C2 | 75 HP | 2-Stroke TLDI application may require additional verification | 356-04000-1 |
| M90A, MD90B, MD90C2, NS90A and related variants | 90 HP | 2-Stroke | 356-04000-1 |
| MD115A2, NSD115A2 | 115 HP | 2-Stroke TLDI application; verify the complete fuel-system configuration | 356-04000-1 |
Technical Specifications
- Product type
- Mechanical fuel pump
- Application
- Selected gasoline 2-stroke outboard fuel systems
- Operation
- Engine crankcase pressure pulse operated
- Installation
- OEM-style replacement for compatible applications
- Connections
- Hose-barb fuel connections; compare with the original pump
- Housing
- Metal pump housing
- Weight
- Approximately 0.17 kg (0.38 lb)
- Gasket and hardware
- Not guaranteed to be included; inspect the package before installation
What's in the Box
- 1 × mechanical fuel pump
- Gasket, clips, or additional installation hardware are not guaranteed and may vary by package or supplier.
Installation Notes
- Stop the engine, disconnect the battery where applicable, and allow the engine to cool.
- Work in a well-ventilated area away from flames, sparks, and other ignition sources.
- Place absorbent material below the pump and relieve fuel-system pressure before disconnecting any hose.
- Label the inlet, outlet, and pulse connections before removing the original pump.
- Remove the mounting fasteners and clean the mounting surface without allowing debris to enter the fuel system.
- Install the replacement pump with the correct gasket or seal for the engine application. Obtain a new gasket separately if one is not supplied.
- Reconnect each hose to the correct port and secure the connections properly.
- Prime the fuel system according to the engine manufacturer's procedure.
- Inspect carefully for leaks before starting the engine, then recheck for leaks during initial operation.
Use the engine manufacturer's service manual for torque values, gasket requirements, hose routing, and any model-specific installation procedure.
Troubleshooting & FAQ
How can I confirm fitment?
Compare the original pump's mounting pattern, hose-port arrangement, pulse connection, and reference number. Then verify the exact engine model, year, stroke, and serial range in the applicable service or parts manual. Horsepower alone is not sufficient to confirm compatibility.
What are common symptoms of a failing mechanical fuel pump?
Possible symptoms include hard starting, fuel starvation at higher throttle, loss of power, stalling, or visible fuel leakage. These symptoms can also be caused by a restricted filter, damaged fuel hose, carburetor issue, tank ventilation problem, or another fuel-system fault.
Is a gasket included?
Package contents can vary. This listing includes the fuel pump only unless the received package specifically states otherwise. Do not reuse a damaged gasket; obtain the correct replacement gasket for your engine.
Is this an OEM pump?
No. This is an aftermarket replacement. Yamaha, Suzuki, Tohatsu, Nissan, Mallory, and Sierra names and numbers are used only to identify compatible applications or reference parts and do not indicate that this product is manufactured by those companies.
Does this fit EFI or 4-stroke engines?
This listing is intended for the specified 2-stroke applications. Do not install it on an EFI or 4-stroke engine unless the manufacturer's parts information specifically confirms that the pump is correct.
When should the pump be replaced?
There is no universal replacement interval. Inspect the pump and surrounding hoses during routine service and replace the pump when it leaks, fails a pressure or delivery test, or shows other signs of damage. Follow the engine manufacturer's service schedule.
What warranty applies?
Warranty coverage, if applicable, depends on the selling channel and the specific supplier or brand supplied. Review the order documentation or contact support before installation if warranty terms are important to your purchase.
Safety & Important Information
- Gasoline is flammable. Keep the work area ventilated and eliminate all ignition sources.
- Confirm the model, year, stroke, serial range, reference number, and physical design before ordering.
- Do not rely on horsepower or brand alone to determine fitment.
- Replace leaking fuel lines, damaged clamps, and deteriorated gaskets as required.
- Professional installation is recommended when you are not familiar with marine fuel systems.
About Sea Sierra
- Marine replacement parts — Practical aftermarket components for service and repair applications.
- Fitment-focused information — Reference numbers and application guidance help you compare the replacement with the original part.
- Support when needed — Contact support with your engine model, year, original part number, and photos of the existing pump when fitment assistance is required.
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