16740-ZW5-003 Honda Regulator | Genuine Used Part

🔧 Product Description

Genuine Honda Fuel Pressure Regulator Assembly - Part Number: 16740-ZW5-003

A genuine Honda fuel-rail pressure regulator for selected BF115A and BF130A EFI four-stroke outboards.

The regulator is mounted on the intake-manifold fuel system and maintains the pressure required by the electronic fuel injectors. Excess fuel is bypassed through the return circuit.

⚙️ Key Features

• Genuine Honda fuel-pressure regulator
• Correct part number 16740-ZW5-003
• Approximately 3.0-bar fuel-pressure specification
• Mounts to the EFI fuel rail and intake manifold
• Uses replaceable O-ring 16741-PG7-005

🚤 Compatibility

Commonly used on

• Honda BF115A and BF130A electronic fuel-injection systems

Typically suits

• Engine models:
• Honda BF115A2
• Honda BF115A3
• Honda BF115A4 / BF115A5
• Honda BF130A1
• Honda BF130A2
• Honda BF130A3
• Honda BF130A4
• Standard and counter-rotation models with the ZW5 intake manifold
• HP Range: 115HP - 130HP
• Engine Type: Honda inline-four EFI four-stroke outboard
• Year Range: Approximately 1999-2007, dependent on model and serial number

🔌 Function

The regulator maintains a stable pressure difference across the fuel injectors. A spring-loaded diaphragm opens the return passage when pressure exceeds its calibrated setting.

⚠️ Common Signs of Failure

• Hard starting or extended cranking
• Engine runs lean and loses power under load
• Rich running, black spark plugs or fuel smell
• Rough idle or poor hot restarting
• Fuel leaks into the regulator reference hose if the diaphragm ruptures

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 16740-ZW5-003 current documented pressure-regulator reference

OEM / Related Numbers

• 16740-ZW5-003
• 16741-PG7-005 regulator O-ring
• Related fuel rail and return pipe
• Related intake-manifold fuel hoses and clamps

Aftermarket / Verified Equivalents

• HWATPS 3.0-bar replacement regulator
• Generic 16740-ZW5-003 BF115 / BF130 pressure regulator
• Specialist-tested used or remanufactured regulator

📦 Condition

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