Fuel Pump Assembly for Honda BF40D & BF50D 4-Stroke Outboard Motors – Replaces 16700-ZZ5-003
Fuel Pump Assembly for Honda BF40D & BF50D 4-Stroke Outboard Motors – Replaces 16700-ZZ5-003 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Fuel Pump Assembly for Honda BF40D & BF50D 4-Stroke Outboard Mo...
Fuel Pump Assembly for Honda BF40D & BF50D 4-Stroke Outboard Motors – Replaces 16700-ZZ5-003 is backordered and will ship as soon as it is back in stock.
Product Details
This is an aftermarket replacement fuel pump assembly for Honda Marine BF40D and BF50D 4-stroke outboard motors. It is intended for the Honda Marine 40 HP and 50 HP applications listed below and helps restore dependable mechanical fuel delivery to the engine.
The assembly replaces Honda OEM part number 16700-ZZ5-003. It is a single fuel pump assembly, not a hardware kit.
- Replacement mechanical fuel pump for selected Honda Marine outboards.
- Applicable to BF40D and BF50D model variants listed in the compatibility table.
- Aftermarket reference: 18-35304.
- Verify the original pump number and engine model before ordering.
Part Number Matrix
Use the following references to compare the replacement with your existing fuel pump.
| Reference Type | Brand or Source | Part Number |
|---|---|---|
| OEM replacement reference | Honda | 16700-ZZ5-003 |
| Aftermarket reference | Aftermarket catalog reference | 18-35304 |
Engine & Model Compatibility
Compatibility is based on the Honda model and part-number references shown below. The available source data does not establish a universal year range, so confirm the model designation and original pump number before purchase.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Honda Marine | BF40D | 40 | 4-Stroke | 16700-ZZ5-003 |
| Honda Marine | BF40DK2 | 40 | 4-Stroke | 16700-ZZ5-003 |
| Honda Marine | BF40DK4 | 40 | 4-Stroke | 16700-ZZ5-003 |
| Honda Marine | BF50D | 50 | 4-Stroke | 16700-ZZ5-003 |
| Honda Marine | BF50DK2 | 50 | 4-Stroke | 16700-ZZ5-003 |
| Honda Marine | BF50DK4 | 50 | 4-Stroke | 16700-ZZ5-003 |
Technical Specifications
- Product Type
- Fuel Pump Assembly
- Fuel Pump Type
- Mechanical fuel pump
- Application
- Honda Marine 4-stroke outboard fuel systems
- Fuel Type
- Gasoline
- Replacement OEM Number
- 16700-ZZ5-003
- Aftermarket Reference
- 18-35304
- Product Status
- Aftermarket replacement; not an OEM component
What’s in the Box
- 1 x Fuel Pump Assembly
Hose clamps, O-rings, gaskets, fasteners and other installation hardware are not listed as included with this single-item fuel pump assembly. Reuse only components that remain serviceable and are approved for your engine application.
Installation Notes
- Confirm the engine model and replacement part number before beginning work.
- Turn the engine off, allow it to cool, and disconnect the battery's negative terminal where applicable.
- Relieve fuel-system pressure and work in a well-ventilated area away from flames, sparks and other ignition sources.
- Place absorbent rags around fuel connections to control spilled gasoline.
- Label or photograph the fuel-line routing before disconnecting the original pump.
- Disconnect the fuel lines and remove the original fuel pump according to the engine service manual.
- Inspect the mounting surface, fuel lines and sealing components. Replace damaged or hardened components with the correct application-specific parts.
- Install the replacement fuel pump in the correct orientation and secure it using the original or properly specified fasteners.
- Reconnect the fuel lines and confirm that the routing is free of kinks, abrasion and interference.
- Reconnect the battery, prime the fuel system according to the engine service manual, and inspect all connections for leaks before operation.
- Start the engine only after confirming that no fuel is leaking. Stop immediately if a leak, fuel odor or abnormal engine behavior is observed.
Troubleshooting & FAQ
How do I know if my fuel pump is failing?
Possible symptoms include hard starting, hesitation, sputtering, loss of power under load or poor operation at higher speed. These symptoms can also be caused by restricted fuel lines, a clogged filter, contaminated fuel, ignition faults or other engine problems. Diagnose the complete fuel system before replacing the pump.
Will this fit my specific Honda BF40D or BF50D?
This replacement is listed for Honda Marine BF40D, BF40DK2, BF40DK4, BF50D, BF50DK2 and BF50DK4 4-stroke models. Because year and serial-number coverage is not established in the available product data, compare your original pump with OEM number 16700-ZZ5-003 and confirm the exact engine model before ordering.
Is this a complete installation kit?
No. This listing is for one fuel pump assembly. Hose clamps, O-rings and other installation hardware are not stated as included.
Does the pump replace Honda part number 16700-ZZ5-003?
Yes. The product is listed as an aftermarket replacement for Honda OEM part number 16700-ZZ5-003. It is not manufactured or sold by Honda.
What is the recommended replacement interval for a fuel pump?
Fuel pumps do not have a universal replacement interval. Service life depends on fuel quality, storage, operating conditions and maintenance. Inspect the pump and surrounding fuel-system components when symptoms occur or during troubleshooting of an older engine.
Is this an OEM fuel pump?
No. This is an aftermarket replacement part intended for the listed Honda Marine applications.
Shipping speed and cost
We ship worldwide quickly. Typical transit is 5–15 days. Standard shipping is free, and expedited options appear at checkout where available.
Warranty and returns
Covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within our standard return window when the item is unused and in its original condition. Contact support with your order details for assistance.
Safety & Important Information
- Gasoline is flammable. Work only in a well-ventilated area and keep the fuel system away from flames, sparks and hot surfaces.
- Always compare the original pump, fittings, mounting arrangement and part number before installation.
- Do not operate the engine if any fuel leak is present.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safe and reliable service.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable service in real-world operating conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing with practical product support.
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