Fuel Pump Assembly for Mercury/Mariner 25–60 HP 4-Stroke Outboards — Replaces 826398A1, 826398A3 and 826398T3
Fuel Pump Assembly for Mercury/Mariner 25–60 HP 4-Stroke Outboards — Replaces 826398A1, 826398A3 and 826398T3 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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Fuel Pump Assembly for Mercury/Mariner 25–60 HP 4-Stroke Outboards ...
Fuel Pump Assembly for Mercury/Mariner 25–60 HP 4-Stroke Outboards — Replaces 826398A1, 826398A3 and 826398T3 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Fuel Pump Assembly is designed for selected Mercury and Mariner 25–60 HP 4-stroke outboard applications. It is intended as a replacement fuel-pump assembly for engines using the matching original application and serial-number range.
The product is listed as a replacement for Mercury reference numbers 826398A1, 826398A3 and 826398T3. The cataloged applications below show fuel-pump listings for selected Mercury 25, 40, 45, 50 and 60 HP 4-stroke models. Because Mercury fitment changes by serial number, verify the complete engine model and serial range before ordering.
- Aftermarket fuel pump assembly for selected Mercury/Mariner 4-stroke outboards.
- Designed as a replacement for the listed original fuel-pump references.
- Supplied as one fuel pump assembly.
- Confirm the engine model, horsepower, stroke and serial number before installation.
Part Number Matrix
Use these references to compare the replacement with the fuel-pump part shown in your engine's parts catalog. These numbers identify replacement references and do not replace serial-number verification.
| Brand | Reference | Reference Type |
|---|---|---|
| Mercury | 826398A1 | Replacement/OEM reference |
| Mercury | 826398A3 | Replacement/OEM reference |
| Mercury | 826398T3 | Replacement/OEM reference |
Engine & Model Compatibility
The following applications are based on cataloged Mercury fuel-pump listings associated with the reference 826398T3. The serial ranges must be read together with the model, horsepower and 4-stroke designation. A similar horsepower rating alone does not confirm fitment.
| Brand | Model | Rated HP | Stroke | Serial Range | Reference |
|---|---|---|---|---|---|
| Mercury | 25 | 25 | 4-Stroke | 0G590000–0G760299 | 826398T3 |
| Mercury | 25 | 25 | 4-Stroke | 0G760300–0T408999 | 826398T3 |
| Mercury | 25 | 25 | 4-Stroke | 9973100–0P016999 | 826398T3 |
| Mercury | 25 | 25 | 4-Stroke | 0P017000–0P153499 | 826398T3 |
| Mercury | 40 | 40 | 4-Stroke | 0G231123–0G760299 | 826398T3 |
| Mercury | 40 | 40 | 4-Stroke | 0G760300–0T408999 | 826398T3 |
| Mercury | 40 | 40 | 4-Stroke | 9944807–0P016999 | 826398T3 |
| Mercury | 40 | 40 | 4-Stroke | 0P017000–0P153499 | 826398T3 |
| Mercury | 40 (4-cylinder) | 40 | 4-Stroke | 0P094500–0P206999 | 826398T3 |
| Mercury | 40 (4-cylinder) | 40 | 4-Stroke | 0T178500–0T598999 | 826398T3 |
| Mercury | 40 Italy | 40 | 4-Stroke | 0G760300–0T178499 | 826398T3 |
| Mercury | 40 Italy | 40 | 4-Stroke | 0P017000–0P094499 | 826398T3 |
| Mercury | 45 Bodensee | 45 | 4-Stroke | 0G231123–0G760299 | 826398T3 |
| Mercury | 45 Bodensee | 45 | 4-Stroke | 9944807–0P016999 | 826398T3 |
| Mercury | 45 Bodensee | 45 | 4-Stroke | 0G760300–0T178499 | 826398T3 |
| Mercury | 45 Bodensee | 45 | 4-Stroke | 0P017000–0P094499 | 826398T3 |
| Mercury | 50 Bigfoot | 50 | 4-Stroke | 0G231123–0G760299 | 826398T3 |
| Mercury | 50 Bigfoot | 50 | 4-Stroke | 9944807–0P016999 | 826398T3 |
| Mercury | 50 Bigfoot | 50 | 4-Stroke | 0G760300–0T178499 | 826398T3 |
| Mercury | 50 Bigfoot | 50 | 4-Stroke | 0P017000–0P094499 | 826398T3 |
| Mercury | 50 (4-cylinder) | 50 | 4-Stroke | 0P094500–0P206999 | 826398T3 |
| Mercury | 50 (4-cylinder) | 50 | 4-Stroke | 0T178500–0T598999 | 826398T3 |
| Mercury | 60 (4-cylinder) | 60 | 4-Stroke | 0P094500–0P206999 | 826398T3 |
| Mercury | 60 (4-cylinder) | 60 | 4-Stroke | 0T178500–0T598999 | 826398T3 |
Important: The table is an application guide, not a universal fitment statement. Compare the old pump, mounting arrangement, connections and engine serial number with the listed application before purchase.
Technical Specs
- Product Type
- Fuel Pump Assembly
- Application
- Selected Mercury/Mariner 25–60 HP 4-stroke outboards
- Installation
- Replacement installation using the original application and mounting arrangement
- Fuel
- Gasoline outboard fuel system
- Product Status
- Aftermarket replacement; not an OEM-manufactured component
What's in the Box
- 1 × Fuel Pump Assembly
Installation Notes
- Disconnect the battery and allow the engine to cool before beginning work.
- Work in a well-ventilated area away from flames, sparks and other ignition sources.
- Relieve fuel-system pressure and contain any fuel released during disassembly.
- Label or photograph the fuel lines and electrical connections before removing the original pump.
- Disconnect the fuel lines and electrical connector, then remove the original pump from its mounting position.
- Install the replacement assembly in the same orientation and secure it with the original mounting hardware where applicable.
- Reconnect the fuel lines and electrical connection, checking that each connection is fully seated and secure.
- Prime the fuel system according to the engine manufacturer's procedure.
- Inspect carefully for fuel leaks before starting the engine, then recheck for leaks during initial operation.
Professional installation is recommended for anyone unfamiliar with marine fuel systems.
Troubleshooting & FAQ
How do I confirm compatibility?
Locate the engine brand, model, horsepower, stroke and complete serial number. Compare all of these details with the application table and compare the original pump's connections and mounting arrangement. Do not rely on horsepower alone.
Where can I find the engine serial number?
On many Mercury and Mariner outboards, the serial number appears on a label or plate on the transom bracket. The exact location can vary by model, so consult the engine documentation if necessary.
What symptoms can indicate a fuel-pump problem?
Possible symptoms include hard starting, stalling, hesitation, loss of power or poor operation under load. These symptoms can also result from restricted fuel lines, clogged filters, electrical faults or other fuel-system problems, so diagnose the system before replacing the pump.
Is this an OEM part?
No. This listing is for an aftermarket replacement fuel pump assembly. The listed Mercury references are used for application and comparison purposes.
Does the assembly require modification?
It is intended as a replacement for the listed applications, but fitment must be confirmed by model and serial number. Do not modify fuel-system components to force installation.
What is included?
The package contains one fuel pump assembly. Additional hoses, filters, gaskets, fasteners or electrical components are not included unless specifically shown or stated in the order details.
Safety & Important Information
- Verify the engine model, horsepower, stroke and serial number before ordering.
- Compare the replacement with the original pump, including fittings, electrical connections, mounting points and orientation.
- Use appropriate fuel-system safety procedures and check thoroughly for leaks after installation.
- This is an aftermarket replacement and is not manufactured by Mercury or Mariner.
About Sea Sierra
- Marine Replacement Parts — Replacement components for selected marine applications.
- Application-Focused Listings — Product references and compatibility information are provided to support model and serial-number verification.
- Customer Support — Contact support with your engine model, serial number and original-part details if you need help confirming an application.
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