Fuel Pump – Fits Johnson Evinrude 6HP-15HP Outboards (Replaces 397839, 391638, 395091)
Fuel Pump – Fits Johnson Evinrude 6HP-15HP Outboards (Replaces 397839, 391638, 395091) 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 – Fits Johnson Evinrude 6HP-15HP Outboards (Replaces 3978...
Fuel Pump – Fits Johnson Evinrude 6HP-15HP Outboards (Replaces 397839, 391638, 395091) is backordered and will ship as soon as it is back in stock.
Product Details
This is a direct-replacement mechanical Fuel Pump – Fits Johnson Evinrude 6HP-15HP Outboards, including the Seahorse series from 1981–1992. It is also compatible with select older Johnson and Evinrude models, including 9.5HP (1965), 10HP (1959–1963), 18HP (1959–1964), and 25HP (1969–1975) outboards that use a 2-port fuel pump.
This component provides interchange for Johnson/Evinrude part numbers 397839, 397274, 391638, 395091, as well as Sierra Marine 18-7350 and Mallory 9-35350.
- Installs via a direct bolt-on flange mount.
- The fuel inlet/outlet configuration can be adjusted by rotating the front plate.
- Includes the fuel pump and a new mounting gasket.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Johnson/Evinrude | 397839 |
| Johnson/Evinrude | 397274 |
| Johnson/Evinrude | 391638 |
| Johnson/Evinrude | 395091 |
| Sierra Marine | 18-7350 |
| Mallory | 9-35350 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Johnson/Evinrude owners, this pump fits a wide range of 2-stroke outboards from 1959–1992. Please verify your specific model and OEM part number before ordering.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Johnson/Evinrude | Seahorse | 6 | 2-Stroke | 1981–1992 | 397839 | |
| Johnson/Evinrude | Seahorse | 8 | 2-Stroke | 1981–1992 | 397839 | |
| Johnson/Evinrude | Seahorse | 9.9 | 2-Stroke | 1981–1992 | 397839 | |
| Johnson/Evinrude | Seahorse | 15 | 2-Stroke | 1981–1992 | 397839 | |
| Johnson | Standard | 9.5 | 2-Stroke | 1965 | Verified compatible | |
| Johnson/Evinrude | Standard | 10 | 2-Stroke | 1959–1963 | ||
| Johnson/Evinrude | Standard | 18 | 2-Stroke | 1959–1964 | ||
| Evinrude | Standard | 25 | 2-Stroke | 1969–1975 | ||
| Johnson/Evinrude | Various | 3-25 | 2-Stroke | 1959–1989 | Various | For 2-port pump models |
Technical Specs
- Product Type
- Mechanical Fuel Pump
- Installation
- Direct bolt-on replacement
- Fuel Type
- Gasoline
- Connection
- Hose barb (inlet/outlet)
- Housing Material
- Metal
- Housing Color
- Silver/aluminum
- Weight
- 0.11 kg (3.98 oz)
- Fitting Type
- Flange mount
- Warranty
- Varies by manufacturer, typically 1-year
- Other Technical Attributes
- Adjustable fuel inlet/outlet configuration by rotating front plate
What’s in the Box
- 1 x Fuel Pump with Gasket (397839/391638/395091/397274)
Installation Notes
- Disconnect the negative battery terminal for safety.
- Place a rag under the fuel pump to catch any spilled fuel.
- Carefully disconnect the inlet and outlet fuel lines from the pump.
- Remove the mounting bolts that secure the old fuel pump to the engine block.
- Clean the mounting surface on the engine, ensuring it is free of old gasket material and debris.
- Place the new gasket onto the engine block, aligning it with the mounting holes.
- Install the new fuel pump, ensuring it is seated correctly against the gasket. Hand-tighten the mounting bolts evenly.
- Torque the bolts to the manufacturer's specification. Do not overtighten.
- Reconnect the fuel inlet and outlet lines securely.
- Prime the fuel system if required by your engine model.
- Reconnect the battery, start the engine, and carefully check for any fuel leaks around the pump and its connections.
Troubleshooting & FAQ
How do I know if this fuel pump fits my engine?
The best way to ensure compatibility is to compare your old fuel pump's part number to the list in our Part Number Matrix. Also, check your engine’s make, model, HP, and year against the Engine & Model Compatibility table. Visually comparing your old part to our product images is also a crucial final step.
What are the common signs of a failing fuel pump?
Symptoms of a bad or failing fuel pump include difficulty starting the engine, engine sputtering at high speeds, loss of power, or the engine dying unexpectedly. You may also notice fuel leaks or unusual noises from the pump area.
Is a new gasket included with this pump?
Yes, a new mounting gasket is included in the package to ensure a proper seal during installation.
Can the fuel inlet and outlet orientation be customized?
Yes, the front plate of the fuel pump can be rotated to adjust the angle of the inlet and outlet hose barbs, providing flexibility for different fuel line routing configurations.
What is the typical lifespan of an outboard fuel pump?
The lifespan of a mechanical fuel pump can vary based on usage, fuel quality, and environmental conditions. It is considered a wear item and should be inspected regularly and replaced as part of preventative maintenance every few hundred hours or if performance issues arise.
Do I need any special tools for this installation?
Basic hand tools such as wrenches or a socket set are typically all that is required. A gasket scraper can be helpful for cleaning the mounting surface. Always refer to your engine's service manual for specific tool recommendations and torque specifications.
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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