Fuel Pump – Fits Johnson Evinrude 6HP-15HP Outboards (Replaces 397839, 391638, 395091)

Fuel Pump – Fits Johnson Evinrude 6HP-15HP Outboards (Replaces 397839, 391638, 395091)

This mechanical fuel pump is a direct-fit replacement for a wide range of Johnson and Evinrude 2-stroke outboard engines, primarily covering 6 HP, 8 HP, 9.9 HP, and 15 HP models from 1981-1992, including the Seahorse series. It also provides coverage for select older models from 1959-1975.

Engineered for reliable fuel delivery, this pump serves as a direct replacement for Johnson/Evinrude part numbers 397839, 397274, 391638, and 395091, as well as aftermarket equivalents from Sierra and Mallory.

• Installation: Direct bolt-on replacement for a straightforward installation.
• Adjustable Design: The fuel inlet/outlet configuration can be adjusted by rotating the front plate to match your setup.
• Fuel Type: Designed for use with Gasoline.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

Technical Specifications

Package Contents

• 1 x Fuel Pump with Gasket (Replaces 397839 / 391638 / 395091 / 397274)

Installation Guide

Warning: Always work in a well-ventilated area and take precautions against fuel spills. Disconnect the battery before beginning.

1. Disconnect Battery: Disconnect the negative battery terminal to prevent accidental starting.
2. Locate Fuel Pump: Identify the existing fuel pump on the engine block.
3. Disconnect Fuel Lines: Carefully loosen the clamps and disconnect the inlet and outlet fuel lines. Have a rag ready to catch any residual fuel.
4. Remove Old Pump: Unbolt the two mounting bolts holding the pump to the engine block. Remove the old pump and its gasket.
5. Clean Mounting Surface: Thoroughly clean the mounting surface on the engine block to ensure a proper seal. Remove any old gasket material.
6. Install New Pump: Place the new gasket onto the engine block, then mount the new fuel pump. Ensure the pump arm is correctly engaging with the camshaft lobe.
7. Secure Pump: Tighten the mounting bolts evenly to the manufacturer's specified torque. Do not overtighten.
8. Reconnect Fuel Lines: Re-attach the inlet and outlet fuel lines to the correct barbs and secure the clamps. If your pump's orientation differs, adjust the front plate as needed.
9. Prime System: Use the primer bulb on your main fuel line to pump fuel into the new pump and carburetors until it is firm.
10. Check for Leaks: With the system primed, carefully inspect all connections for any signs of fuel leaks before starting the engine.
11. Test Operation: Reconnect the battery. Start the engine and let it run, checking again for any leaks and ensuring smooth operation.

Troubleshooting & FAQ

Q: How do I confirm this pump fits my specific engine model?

A: The best way is to match your existing part number to one of the numbers listed in our Part Number Cross-Reference table. You can also use our Compatible Engine Models table to check your HP and year range. For Johnson/Evinrude owners, we recommend using the serial number guide linked above to verify your engine details.

Q: What are the common signs that my old fuel pump needs replacement?

A: Common symptoms of a failing fuel pump include the engine bogging down at high speeds, difficulty starting, stalling, rough idling, or a noticeable drop in overall performance. A physical inspection might reveal fuel leaks from the pump housing or weep holes.

Q: How does the adjustable inlet/outlet work?

A: The front plate of the fuel pump can be rotated. This allows you to change the orientation of the inlet and outlet hose barbs to better match the fuel line routing on your specific engine, simplifying installation.

Q: Is this an OEM part?

A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?

A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?

A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.