5007423 VRO Fuel/Oil Pump Johnson Evinrude VRO Assembly | Genuine Used Part

🔧 Product Description

Genuine BRP Johnson / Evinrude Four-Wire VRO / OMS Fuel-and-Oil Pump - Part Number: 5007423

A genuine BRP four-wire Variable Ratio Oiling / Oil Metering System pump for Johnson and Evinrude outboards. The assembly combines a crankcase-pulse fuel pump with a metered oil pump and electronic no-oil monitoring. It is the principal service replacement for numerous earlier three-wire and four-wire VRO pump assemblies, excluding two-cylinder applications.

⚙️ Key Features

• Genuine BRP VRO / OMS pump assembly
• Current service number 5007423
• Combined fuel delivery and oil metering
• Four-wire electronic no-oil warning circuit
• Broad three-, four- and six-cylinder Johnson / Evinrude coverage

🚤 Compatibility

• Johnson and Evinrude three-cylinder VRO / OMS-equipped outboards
• Johnson and Evinrude V4 outboards
• Johnson and Evinrude V6 outboards
• Applicable carburetted and selected Ficht-era engines using the VRO / OMS pump
• Approximate application era: 1984 onward through the final VRO / OMS-equipped model families
• Not intended as the service replacement for two-cylinder engines
• Exact installation depends on pulse-port, hose, warning-harness and oil-tank system configuration

🔌 Function

The assembly uses crankcase pulses to pump fuel while a second section meters oil from the remote tank into the fuel stream. The electronic circuit monitors oil-pump pulses and activates the no-oil warning when delivery is not detected.

⚠️ Common Signs of Failure

• No-oil alarm activates
• Excessive oil consumption or heavy smoke
• Insufficient oil delivery
• Fuel starvation under load
• Fuel or oil leaks from pump body
• Pulse hose, warning harness or oil-line fittings are damaged

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 5007423 → Supersedes 5004559
• 5007423 also replaces earlier OMC references 0174566, 0174257, 0174425, 0438406, 0175163, 0174879, 0174619, 0174563, 0174720, 0174567, 0174427, 0174264, 0175161, 0174565, 0175425, 0174424, 0174247 and 0175162
• The four-wire replacement can replace applicable earlier three-wire pumps when installed with the correct harness and warning-system arrangement

OEM / Related Numbers

• 5007423
• 5004559
• 0438406 / 438406
• 0174566 / 174566
• 0175163 / 175163
• 0174879 / 174879
• 0174619 / 174619
• 0174720 / 174720
• Related pulse fitting, oil hose, fuel hose and warning harness

Aftermarket / Verified Equivalents

• No widely verified complete aftermarket VRO / OMS pump matching all fuel, oil and warning functions
• Genuine BRP 5007423 is the preferred complete replacement
• Fuel-only replacement pumps are available for correctly configured pre-mix conversions but do not retain automatic oiling or the original VRO monitoring functions
• Aftermarket rebuild components should not be treated as equivalent to a fully tested complete pump

📦 Condition

• Genuine used part
• Removed from running engine where applicable
• In good working condition unless otherwise stated