Fuel Injector Assembly – Fits Honda BF40D/BF50D 40-50HP (Replaces 16450-ZZ5-003)
Fuel Injector Assembly – Fits Honda BF40D/BF50D 40-50HP (Replaces 16450-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
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Fuel Injector Assembly – Fits Honda BF40D/BF50D 40-50HP (Replaces 1...
Fuel Injector Assembly – Fits Honda BF40D/BF50D 40-50HP (Replaces 16450-ZZ5-003) is backordered and will ship as soon as it is back in stock.
Product Details
This high-performance Fuel Injector Assembly – Fits Honda BF40D/BF50D 40-50HP Outboard Engines (Replaces 16450-ZZ5-003) is engineered for Honda Marine's 40-50HP, 4-stroke outboard engines, specifically the BF40D and BF50D series from the 2000s with BBDJ/BBEJ serial prefixes.
It serves as a direct aftermarket replacement for Honda part 16450-ZZ5-003 and provides an equivalent for JESBEN 16450ZZ5003 and KEIITYEN 16450-ZZ5-003.
- Offers a direct OEM replacement fit for straightforward installation.
- Flow-matched to OEM standards to ensure optimal fuel delivery and engine performance.
- Each unit is 100% tested for internal coil resistance and fuel flow rate before shipping.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Honda | 16450-ZZ5-003 |
| JESBEN | 16450ZZ5003 |
| KEIITYEN | 16450-ZZ5-003 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
For Honda owners: Please verify your engine’s model and serial number prefix (e.g., BBDJ, BBEJ) against this list to ensure proper fitment for your 40HP or 50HP outboard.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Honda | BF40D LHA | 40 | 4-Stroke | 16450-ZZ5-003 | BBDJ-1000001 - BBDJ-9999999 |
| Honda | BF40D LRTA | 40 | 4-Stroke | 16450-ZZ5-003 | BBDJ-1000001 - BBDJ-9999999 |
| Honda | BF40DK2 LHA | 40 | 4-Stroke | 16450-ZZ5-003 | BBDJ-1100001 - BBDJ-9999999 |
| Honda | BF40DK2 LRTA | 40 | 4-Stroke | 16450-ZZ5-003 | BBDJ-1100001 - BBDJ-9999999 |
| Honda | BF40DK4 LHA | 40 | 4-Stroke | 16450-ZZ5-003 | BBDJ-1300001 - BBDJ-9999999 |
| Honda | BF40DK4 LRTA | 40 | 4-Stroke | 16450-ZZ5-003 | BBDJ-1300001 - BBDJ-9999999 |
| Honda | BF50D LRTA | 50 | 4-Stroke | 16450-ZZ5-003 | BBEJ-1000001 - BBEJ-9999999 |
| Honda | BF50D XRTA | 50 | 4-Stroke | 16450-ZZ5-003 | BBEJ-1000001 - BBEJ-9999999 |
| Honda | BF50DK2 LRTA | 50 | 4-Stroke | 16450-ZZ5-003 | BBEJ-1100001 - BBEJ-9999999 |
| Honda | BF50DK2 XRTA | 50 | 4-Stroke | 16450-ZZ5-003 | BBEJ-1100001 - BBEJ-9999999 |
| Honda | BF50DK4 LRTA | 50 | 4-Stroke | 16450-ZZ5-003 | BBEJ-1300001 - BBEJ-9999999 |
| Honda | BF50DK4 XRTA | 50 | 4-Stroke | 16450-ZZ5-003 | BBEJ-1300001 - BBEJ-9999999 |
Technical Specs
- Product Type
- Fuel Injector Assembly
- Installation
- Direct OEM replacement
- Fuel Type
- Gasoline
- Connection
- Electrical connector with fuel line
- Housing Material
- Metal
- Housing Color
- Silver/metallic
- Dimensions
- 8 cm x 4.5 cm x 3.5 cm
- Weight
- 0.023 kg (0.05 lbs)
- Fitting Type
- 6-hole injector nozzle
- Other Technical Attributes
- Flow matched to OEM standards, 100% tested for internal coil resistance and fuel flow rate
- Warranty
- 1 Year (aftermarket versions)
What’s in the Box
- 1 x Fuel Injector Assembly (16450-ZZ5-003)
Installation Notes
- Disconnect the negative battery terminal and relieve all pressure from the fuel system.
- Carefully disconnect the electrical connector and fuel line from the old injector.
- Remove the fuel rail assembly to access the injectors.
- Remove the old injector from the fuel rail.
- Lubricate the O-rings on the new injector with clean engine oil before installation.
- Press the new injector firmly into the fuel rail and intake manifold, ensuring it is properly seated.
- Re-secure the fuel rail and torque its bolts to the manufacturer's specification.
- Reconnect the fuel line and electrical connector.
- Reconnect the battery, prime the fuel system, and carefully check for any leaks before starting the engine.
Troubleshooting & FAQ
How do I know if my fuel injector is failing?
Common signs include engine misfires, rough idling, poor acceleration, increased fuel consumption, or difficulty starting. A "check engine" light may also illuminate.
Is this injector sold individually or as a set?
This listing is for a single (1) fuel injector assembly. While you can replace just one, it is often recommended to replace them as a full set to ensure balanced cylinder performance and fuel delivery.
What is the benefit of a "flow-matched" injector?
Flow matching ensures that each injector delivers the same amount of fuel under identical conditions. This leads to a smoother running engine, balanced power across all cylinders, and optimal fuel efficiency.
Will this fit my Honda BF40A model?
No, this injector is specifically for the newer "D" models (BF40D/BF50D) as indicated by the compatible serial number prefixes (BBDJ/BBEJ). Always check your engine's specific part number and serial range before ordering.
What is the recommended replacement interval for fuel injectors?
There is no fixed interval; replacement is typically done when performance issues are diagnosed. Injector lifespan can be extended by using high-quality marine fuel and replacing fuel filters regularly.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials, manufactured in an ISO 9002 facility, and batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
This product is 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 for unused items in their original condition. See our policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement part, not an OEM component. Brand names and part numbers are used for reference purposes only.
- Professional installation is recommended for safety and performance. Improper installation can lead to fuel leaks or engine damage.
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, getting you back on the water faster.
- Manufacturer-Direct Value — We offer fair pricing without compromising on materials or quality control.
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