VRO Conversion Fuel Pump – Fits Johnson Evinrude OMC 120HP-300HP V4 V6 V8 (Replaces 5004558, 435953, 174566, 0438400)

Product Details

This VRO Conversion Fuel Pump – Fits Johnson Evinrude OMC 120HP-300HP V4 V6 V8 is engineered for Evinrude and Johnson marine outboards requiring VRO system elimination. Compatible with 120–300 HP models including V4 Looper configurations and V6/V8 crossflow engines, this fuel-only pump allows reliable operation when the original VRO system fails.

Designed as a direct replacement for OEM part numbers 5004558, 435953, 174566, and 0438400, this conversion pump eliminates the need for costly VRO repairs while restoring fuel delivery to your outboard.

• Fuel-only pump design—requires 50:1 premix (1 pint oil to 6 gallons gas) in your fuel tank
• Mounts using your existing VRO bracket (modification may be required)
• Eliminates VRO system complexity and common failure points

Part Number Matrix

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

Engine & Model Compatibility

Confirm your engine model/year in the table below.

Technical Specs

Pump Type

Fuel-only (non-VRO)

Oil Mixing Requirement

50:1 premix (1 pint oil to 6 gallons gas)

Mounting

Uses existing VRO bracket (modification required)

OEM Equivalents

5004558, 435953, 174566, 0438400

Application

Johnson, Evinrude, OMC 120–300 HP V4/V6/V8 outboards

What's in the Box

• 1 × Fuel Pump (conversion unit)

Installation Notes

1. Disconnect battery and relieve fuel system pressure before beginning work.
2. Remove the existing VRO pump assembly from the mounting bracket.
3. Modify the existing VRO bracket as needed to accommodate the new fuel-only pump.
4. Install the conversion fuel pump onto the modified bracket and secure with appropriate hardware.
5. Connect fuel supply lines to the pump inlet and outlet ports, ensuring all connections are tight and leak-free.
6. Bypass or remove the VRO oil injection system components as they will no longer be used.
7. Prepare your fuel supply by premixing oil and gasoline at a 50:1 ratio (1 pint of two-stroke oil per 6 gallons of gasoline).
8. Prime the fuel system, inspect all connections for leaks, and test-run the engine in a controlled environment before normal operation.

Troubleshooting & FAQ

Will this pump work if I still have the VRO system installed?

This conversion pump is designed to replace a failed or problematic VRO system. It pumps fuel only and does not inject oil. You must premix your fuel at 50:1 and bypass or remove the VRO oil injection components.

What fuel/oil ratio should I use after installing this pump?

Always premix at 50:1—that's 1 pint of two-stroke outboard oil to every 6 gallons of gasoline. Do not rely on oil injection; this pump does not provide it.

Does this kit include the mounting bracket?

No. You must reuse your existing VRO mounting bracket. Modification of the bracket may be required to properly secure the new fuel pump.

How do I know if my VRO system has failed?

Common symptoms include oil starvation, engine seizure, erratic oil delivery, fuel delivery inconsistency, or warning alarms. If you suspect VRO failure, inspect the system immediately and consider conversion to premix for reliability.

Can I use this on a crossflow 150, 175, 185, 200, or 235 HP engine?

Yes. This pump is compatible with large crossflow V6 and V8 models in the 120–300 HP range, including 150, 175, 185, 200, and 235 HP engines with VRO systems.

What is the difference between this and the original VRO pump?

The original VRO pump meters both fuel and oil automatically. This conversion pump delivers fuel only, eliminating VRO complexity and failure-prone oil metering. You gain simplicity and reliability, but must premix fuel manually.

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 against 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.