Fuel Pump – Fits Johnson/Evinrude 6-15 HP Outboards (Replaces 397274, 397839, 391638, 395091)

$99.99

Worry-free returns

You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This mechanical Fuel Pump fits Johnson/Evinrude 6-15 HP outboards, specifically 6 HP, 8 HP, 9.9 HP, and 15 HP 2-stroke models manufactured between 1981 and 1992. It is also compatible with some historical 9.5 HP (1965) and 25 HP (1970s) engines that use a 2-port fuel pump design.

It serves as a direct cross-reference for Johnson/Evinrude part numbers 397274, 397839, 391638, and 395091, as well as aftermarket equivalents like Sierra 18-7350 and Mallory 9-35350, ensuring wide compatibility.

Direct engine-mount installation for a secure fit.
Mechanically operated by the engine's internal pressure pulse.
Includes a new mounting gasket for a complete, leak-free seal.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket.

Brand	Part Number
Johnson/Evinrude	397274
Johnson/Evinrude	397839
Johnson/Evinrude	391638
Johnson/Evinrude	395091
Sierra	18-7350
Mallory	9-35350
GWA	GWA122
ARCO Marine	FP002

Engine & Model Compatibility

Confirm your engine model/year in the table below.

This pump is engineered for a wide range of Johnson and Evinrude 2-stroke outboards using a 2-port mechanical fuel pump.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Johnson/Evinrude	Seahorse	6 HP	2-Stroke	1981–1992	397839, 391638, 395091, 397274
Johnson/Evinrude	Seahorse	8 HP	2-Stroke	1981–1992	397839, 391638, 395091, 397274
Johnson/Evinrude	Seahorse	9.9 HP	2-Stroke	1981–1992	397839, 391638, 395091, 397274
Johnson/Evinrude	Seahorse	15 HP	2-Stroke	1981–1992	397839, 391638, 395091, 397274
Johnson	-	9.5 HP	2-Stroke	1965	397839, 391638, 395091, 397274
Evinrude	-	25 HP	2-Stroke	1969–1975	397839, 391638, 395091, 397274	Older 70's models
Johnson/Evinrude	Various	10 HP	2-Stroke	1959–1963	397839, 391638, 395091, 397274	May also fit
Johnson/Evinrude	Various	18 HP	2-Stroke	1959–1964	397839, 391638, 395091, 397274	May also fit
Johnson/Evinrude	Various	3–25 HP	2-Stroke	1959–1989	397839, 391638, 395091, 397274	Models using 2-port pump

Technical Specs

Product Type: Mechanical Fuel Pump
Installation: Direct engine mount
Fuel Type: Gasoline
Connection: Hose barb
Housing Material: Aluminum, plastic components
Housing Color: Silver/aluminum
Fitting Type: Mounting gasket interface
Warranty: 1-2 years (varies by manufacturer)
Other Technical Attributes: Mechanical operation (engine-driven), 2-port design

What’s in the Box

1 x Fuel Pump (Replaces OE# 397274, 397839, 391638, 395091)
1 x Mounting Gasket (Equivalent to Sierra 18-0850)

Installation Notes

Disconnect the battery and ensure the engine is cool.
Place a rag below the fuel pump to catch any spilled fuel.
Carefully disconnect the inlet and outlet fuel lines from the pump.
Unscrew the mounting bolts holding the old pump to the engine block.
Remove the old pump and discard the old gasket.
Clean the mounting surface on the engine block thoroughly to ensure a perfect seal.
Place the new gasket onto the engine block, aligning the bolt holes.
Mount the new fuel pump, ensuring it is correctly seated against the gasket.
Tighten the mounting bolts evenly to the manufacturer's specified torque.
Reconnect the fuel lines securely to the correct ports.
Reconnect the battery and prime the fuel system if necessary. Check for any leaks before starting the engine.

Troubleshooting & FAQ

How do I confirm this pump fits my engine?

This pump is designed for Johnson/Evinrude 6, 8, 9.9, and 15 HP 2-stroke outboards from 1981–1992, plus some others. The best method is to match your old part number to the list in our Part Number Matrix and check your engine details against the Compatibility table.

What are the signs of a failing fuel pump?

Common symptoms include the engine sputtering at high speeds, loss of power, difficulty starting, or the engine dying unexpectedly. You may also see fuel "weeping" or leaking from the pump body or its seams.

Is this a 2-port or 3-port pump?

This is a 2-port mechanical fuel pump. It is designed for engine fuel systems that do not use a third hose connection for vacuum pulse or fuel return. Please verify your original pump has two hose connections before ordering.

What maintenance is required for this fuel pump?

Mechanical fuel pumps are generally not serviceable and are replaced when they fail. To maximize its lifespan, use clean, high-quality fuel and regularly service your boat's primary fuel filter(s) to prevent debris from entering the pump.

Is this an OEM part or an aftermarket replacement?

This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials, manufactured in an ISO 9002 facility, and batch-inspected for consistency.

How fast is shipping and what does it cost?

We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options will appear at checkout if they are available for your location.

What is the warranty and return policy?

This part is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. Please see our full 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

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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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