VRO Fuel Pump Conversion - Fits Johnson/Evinrude 90-250HP Outboards (Replaces 5007420, 5007422)

VRO Fuel Pump Conversion - Fits Johnson/Evinrude 90-250HP Outboards (Replaces 5007420, 5007422)

This fuel pump assembly is designed to replace the VRO (Variable Ratio Oiling) system on Johnson/Evinrude 90-250HP, 2-Stroke, V4, and V6 outboards (1984-1996) with a 90° cylinder block angle, including both Looper and Crossflow engine designs. It converts the engine to run on a standard 50:1 fuel/oil premix, bypassing the original oil injection system.

This is a direct replacement for Johnson/Evinrude part numbers 5007420 and 5007422, as well as OMC 4-7359, EMP 1399-07359, and Volvo 5007420/5007422.

• Conversion Design: This is a non-oiling pump that bypasses the factory VRO system, requiring the use of 50:1 premixed fuel.
• Installation Method: Mounts directly in the factory location with OEM-style connections for a straightforward installation.
• Included Parts: The package contains one complete fuel pump conversion assembly.

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 Serial Number Guide.

Specific Models:

Technical Specifications

Package Contents

• 1 x VRO Fuel Pump Conversion Assembly (5007422)

Installation Guide

1. Disconnect the negative battery cable and ensure the engine is cool before starting.
2. Relieve any pressure in the fuel system. Place rags around the fuel fittings to catch any minor spills.
3. Carefully disconnect the fuel lines and the electrical connection from the existing VRO pump.
4. Unbolt and remove the old VRO pump from the engine block.
5. Mount the new fuel pump conversion assembly onto the engine, securing it with the original hardware.
6. Connect the fuel inlet line (from the tank) and the fuel outlet line (to the carburetors).
7. Crucially, the original oil line from the oil tank must be disconnected and securely plugged. This pump does not use oil injection.
8. Confirm all connections are tight to prevent fuel leaks.
9. From this point forward, you must use a 50:1 fuel-to-oil premix in your main fuel tank. Failure to do so will cause severe engine damage.
10. Reconnect the battery. Prime the fuel system using the primer bulb until firm and check thoroughly for leaks before starting the engine.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?

A: This pump is designed for Johnson/Evinrude V4 and V6 engines (90-250HP) from 1984-1996 with a 90° cylinder block. Please check the specific models listed in our compatibility table and verify your OEM part number is 5007420 or 5007422.

Q: Is this a direct replacement for my VRO pump? What is the difference?

A: Yes, it is a direct-fit replacement, but it is a non-oiling conversion. It completely bypasses the original VRO system, which means you must switch to using a 50:1 fuel/oil premix in your gasoline tank for proper engine lubrication.

Q: Why should I convert from a VRO system to a premix system?

A: Converting to a non-VRO fuel pump is often done for improved reliability and simplicity. It eliminates a common failure point (the VRO's oiling mechanism), giving the boat owner direct control over the engine's lubrication through premixed fuel.

Q: What are the signs my old VRO pump is failing?

A: Common signs of a failing VRO pump include the engine running rough, stalling at idle, a noticeable loss of power, surging, or the warning horn sounding. A faulty VRO can lead to incorrect oiling and catastrophic engine damage, which is why many boaters choose this conversion for peace of mind.

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

• This pump requires 50:1 fuel/oil premix—the oil injection system is disabled in this assembly. The VRO (Variable Ratio Oiling) system is bypassed completely.
• 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.