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Fuel Injector Assembly – Fits Honda BF40D/BF50D 40-50HP Outboard Engines (Replaces 16450-ZZ5-003)
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Fuel Injector Assembly – Fits Honda BF40D/BF50D 40-50HP Outboard Engines (Replaces 16450-ZZ5-003)
This fuel injector assembly is engineered for Honda Marine 40-50HP, 4-stroke BF40D and BF50D series outboard engines. It provides a reliable, direct replacement for original equipment, ensuring proper fuel delivery and engine performance.
This part is a direct cross-reference for Honda OEM part 16450-ZZ5-003 and aftermarket parts from JESBEN (16450ZZ5003) and KEIITYEN (16450-ZZ5-003). Each injector is flow-matched to OEM standards and fully tested for internal coil resistance and fuel flow rates.
- Installation Type: Direct OEM replacement
- Compatible Fuel: Gasoline
- Key Feature: 6-hole injector nozzle for precise fuel atomization
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Honda | 16450-ZZ5-003 |
| JESBEN | 16450ZZ5003 |
| KEIITYEN | 16450-ZZ5-003 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| 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 Specifications
| Specification | Value |
|---|---|
| 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 | 0.05 lbs (0.023 kg) |
| Fitting Type | 6-hole injector nozzle |
| Warranty | 1 Year (aftermarket versions) |
| Other Technical Attributes | Flow matched to OEM standards, 100% tested for internal coil resistance and fuel flow rate |
Package Contents
- 1 x Fuel Injector Assembly (16450-ZZ5-003)
Installation Guide
Professional installation is recommended. Always consult your service manual before beginning work. The following is a general guide:
- Safety First: Ensure the engine is fully cooled. Disconnect the negative terminal from the battery.
- Relieve Fuel Pressure: To prevent fuel spray, safely relieve pressure from the fuel system according to your engine's service manual.
- Disconnect: Unplug the electrical connector from the fuel injector.
- Remove Fuel Line: Place a rag underneath the connection to catch spills and carefully disconnect the fuel line from the injector.
- Unseat Injector: Unbolt the fuel rail and carefully pull the old injector assembly out. Note its orientation.
- Prepare New Injector: Lightly lubricate the new injector's O-rings with clean engine oil for a smooth installation and proper seal.
- Install New Injector: Press the new injector firmly into its port on the fuel rail, ensuring it is properly seated.
- Secure Connections: Re-fasten the fuel rail. Reconnect the fuel line and the electrical connector, ensuring both are secure.
- Check for Leaks: Reconnect the battery. Turn the ignition key to the "On" position (without starting the engine) several times to prime the system and build pressure. Visually inspect for any fuel leaks.
- Final Test: Once confirmed there are no leaks, start the engine and let it idle, checking again for any issues.
Troubleshooting & FAQ
Q: How do I confirm this injector fits my Honda engine?
A: This injector is specifically for Honda BF40D and BF50D series 4-stroke outboards. To ensure a perfect match, please compare your engine's model and serial number with the ranges listed in our "Compatible Engine Models" table. It is a direct replacement for OEM part number 16450-ZZ5-003.
Q: What are the common signs of a failing fuel injector?
A: Symptoms of a faulty injector include rough idling, engine misfires (especially at idle or under load), poor acceleration, reduced fuel economy, and difficulty starting the engine.
Q: Is this a genuine Honda part?
A: This is a high-quality aftermarket part, not a genuine Honda OEM component. It is designed and manufactured to meet or exceed OEM specifications for fit, form, and function, offering a reliable alternative.
Q: Does this injector require any calibration before installation?
A: No. Each injector is 100% tested for flow rate and coil resistance at the factory, so it arrives ready to install without any need for additional calibration.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
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Основанная в 2002 году, компания JLM Marine зарекомендовала себя как специализированный производитель высококачественных морских деталей, базирующийся в Китае. Наша приверженность совершенству в производстве заслужила нам доверие ведущих мировых морских брендов.
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