Honda Fuel Pump 16700-ZW1-004 BF25 BF30 BF40 BF50 BF75 BF90 Keihin OEM

Honda Fuel Pump 16700-ZW1-004 BF25 BF30 BF40 BF50 BF75 BF90 Keihin OEM.

Restore Constant High-RPM Fuel Delivery & Eliminate Surging: Genuine Honda Keihin Pump

Eliminate fuel starvation at wide-open throttle, hard starting, sluggish hole-shots, and raw fuel leaking into your crankcase oil. This Genuine Honda Marine Factory OEM Fuel Pump Assembly (Part Number 16700-ZW1-004) is the authentic factory fuel pump manufactured by Keihin in Japan for Honda Marine 4-stroke outboard motors, including BF25, BF30, BF40, BF50, BF75, and BF90 models . Operating a multi-cylinder outboard with a torn or stiff fuel pump diaphragm starves cylinders of fuel, causing lean combustion overheating and risking severe engine damage miles from shore.

Manufactured to Honda Marine's highest engineering tolerances, this 100% genuine Keihin pump features corrosion-resistant cast alloy housings, high-grade ethanol-resistant fluoroelastomer diaphragms, and precision internal one-way check valves. Engineered to handle continuous marine vibration and high ambient cowl temperatures, it delivers smooth, consistent low-pressure fuel delivery from idle to maximum RPM. Sourced directly through an Authorized Honda Dealer , this assembly arrives factory-assembled and pressure-tested, ready for a seamless bolt-on replacement that restores original factory performance.

This authentic factory replacement component is cataloged under Honda Marine OEM Part Number 16700-ZW1-004 (16700ZW1004 / Replaces prior 16700-ZW1-003 / Pump Assy., Fuel / Keihin Marine Fuel Pump / BF50 BF90 Low Pressure Pump) .

Why This Genuine Honda 16700-ZW1-004 OEM Keihin Fuel Pump is the Marine Standard:

100% Genuine Factory OEM Component: Manufactured in Japan by Keihin directly for Honda Marine to ensure factory warranty compliance and exact powerhead alignment.

Authorized Dealer Sourced: Guaranteed authentic Honda parts inventory—never an unbranded clone or questionable aftermarket copy.

Ethanol-Resistant Diaphragm: Built with high-grade elastomeric diaphragms engineered to withstand modern ethanol-blended fuels (E10) without cracking or stiffening.

Precision Keihin Check Valves: Delivers consistent fuel pressure across all engine RPMs, eliminating mid-range hesitation and high-RPM fuel lean-out.

Prevents Crankcase Oil Dilution: Sealed design stops raw fuel from leaking past the actuator mount into the engine oil, protecting crank journals and bearings.

Direct Bolt-On Fitment: Matches factory fuel line barb orientations and powerhead mounting bolt holes with zero modification required.

Technical Specifications:

Brand: Genuine Honda Marine / Keihin (OEM Factory Original)

Part Number: 16700-ZW1-004 (16700ZW1004)

Replaces Prior Part Number: 16700-ZW1-003 (16700ZW1003)

Component Type: Engine Mechanical / Pulse Fuel Pump Assembly

Manufacturer: Keihin (Made in Japan)

Application Location: Mounts Directly to Outboard Powerhead / Cylinder Block

Fuel Compatibility: Marine Unleaded Gasoline, E10 Ethanol Blends

Condition: Brand New in Official Factory Honda Packaging

Guaranteed Equipment Model Compatibility Matrix:

Specifically engineered for direct fitment across Honda Marine 4-stroke outboard platforms:

Honda Marine 3-Cylinder & 4-Cylinder Outboard Engines:

Fits Honda BF25 (BF25A, BF25D models).

Fits Honda BF30 (BF30A, BF30D models).

Fits Honda BF40 (BF40A, BF40D models).

Fits Honda BF50 (BF50A, BF50D models).

Fits Honda BF75 (BF75A, BF75DK models).

Fits Honda BF90 (BF90A, BF90DK models).

Direct Application: Direct factory replacement for any Honda Marine owner's manual, parts schematic, or dealer workshop manual specifying fuel pump part number 16700-ZW1-004 or 16700-ZW1-003.

🛠️ Pro-Maintenance Tip: Watch the "Oil Dilution Sniff Test & Mounting O-Ring Secret! " Oil Dilution Sniff Test: Before pulling your old pump, pull your engine dipstick and smell the motor oil! If your oil level has mysteriously risen or smells distinctly like raw gasoline, your fuel pump diaphragm has pinholed. When the pump is mounted to the engine block, vacuum draws raw fuel through the torn diaphragm straight into the crankcase. Always change your engine oil and filter immediately after replacing a failed fuel pump to prevent spun rod bearings caused by thinned oil. Mounting O-Ring / Gasket Secret: When installing the new 16700-ZW1-004 pump, always install a fresh OEM mounting O-ring/gasket on the powerhead flange. Coat the rubber seal with a thin layer of clean motor oil before torquing the mounting bolts evenly to factory spec. This guarantees an airtight crankcase seal and prevents vacuum leaks that interfere with pump actuation.

Specifications

• Non-Domestic Product: No
• Custom Bundle: No
• Manufacturer Part Number: 16700ZW1004
• Country of Origin: Japan
• Modified Item: No

Condition: New