Fuel Pump – Fits Johnson/Evinrude 25-140 HP Outboard Motors (Replaces 438559)

Fuel Pump – Fits Johnson/Evinrude 25-140 HP Outboard Motors (Replaces 438559)

This fuel pump is designed for a wide range of Johnson/Evinrude outboard engines from 25 HP to 140 HP that utilize a 3-nipple fuel pump configuration. It offers a reliable, direct-fit replacement solution to restore your engine's fuel delivery system to optimal performance.

This component directly replaces Johnson/Evinrude part numbers: 438559, 438557, 343462, 0438559, 0438558, and 5005462.

• Installation Type: Direct OEM replacement
• Fuel Compatibility: Gasoline
• Connection Type: 3-nipple configuration

Part Number Cross-Reference

Use this table to confirm equivalent part numbers.

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 Outboard Fuel Pump (Replaces 438559)

Installation Guide

Follow these general steps to replace your outboard fuel pump. Professional installation is recommended.

1. Safety First: Disconnect the battery and ensure the engine is cool. Work in a well-ventilated area and have a fire extinguisher nearby.
2. Locate the Pump: Identify the old fuel pump on the engine block.
3. Disconnect Fuel Lines: Carefully disconnect the inlet, outlet, and pulse fuel lines from the pump. Have rags ready to catch any spilled fuel. Note the orientation of each line.
4. Remove the Old Pump: Unbolt the mounting screws holding the fuel pump to the engine.
5. Clean the Surface: Clean the mounting surface on the engine block to ensure a proper seal with the new pump.
6. Install the New Pump: Position the new fuel pump and secure it with the mounting screws. Do not overtighten.
7. Reconnect Fuel Lines: Attach the fuel lines to the correct nipples on the new pump. Ensure connections are secure to prevent leaks.
8. Prime the System: Squeeze the primer bulb until it becomes firm to fill the new pump and carburetor with fuel.
9. Check for Leaks: Visually inspect all connections for any signs of fuel leaks.
10. Test the Engine: Reconnect the battery, start the engine on a water supply, and check again for leaks while it runs at idle.

Troubleshooting & FAQ

Q: How do I confirm this pump fits my Johnson/Evinrude engine?

A: This pump fits a wide range of Johnson and Evinrude outboards from 25 HP to 140 HP, plus certain Crossflow engine models. The most important factor is confirming your engine uses a 3-nipple style fuel pump and that your original part number matches one of the numbers listed in our cross-reference table, such as 438559 or 438557.

Q: What are the common signs of a failing fuel pump?

A: Common symptoms include difficulty starting the engine, stalling at low speeds, engine bogging down under acceleration, or a noticeable loss of power. These issues often indicate the pump can no longer supply a consistent flow and pressure of fuel to the carburetors.

Q: What is the third nipple for on this pump?

A: This is a mechanical fuel pump that operates using pressure pulses from the engine's crankcase. The third nipple is the pulse line connection, which allows these pressure fluctuations to activate the pump's internal diaphragm, drawing fuel from the tank and sending it to the carburetors.

Q: Is this a replacement for a VRO pump?

A: Yes, this pump is commonly used to replace a failed or deleted VRO (Variable Ratio Oiling) system pump on many Johnson/Evinrude engines. When converting from VRO, you must pre-mix your gasoline and oil and use a pump like this one for fuel delivery only.

Q: OEM vs. Aftermarket?

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.