38580-ZY9-023 38580-ZY9-003 Main Relay Assembly for Honda BF75 BF90 | JLM Marine

Main Relay Assembly for Honda BF75 BF90 – Replaces 38580-ZY9-023, 38580-ZY9-003

This Main Relay Assembly is engineered for Honda BF75 and BF90 EFI outboard engines, delivering reliable ignition system control. Designed as a direct replacement for OEM relay assemblies, it ensures proper electrical switching and ignition timing across a wide range of Honda mid-range outboards.

Direct Replacements: 38580-ZY9-003, 38580-ZY9-023. This aftermarket relay assembly is built to OEM specifications, providing dependable performance for Honda's electronic fuel injection systems.

• High-quality plastic construction for maximum strength and durability
• Plug-and-play installation with factory-style connectors
• Low heat and low power consumption design for extended lifespan

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket sources.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

Your package includes:

• 1 × Main Relay Assembly (CDI Igniter)
• The package contains all parts shown in the product images

Installation Guide

1. Disconnect the battery: Remove the negative terminal to ensure electrical safety before beginning work.
2. Locate the original relay assembly: Refer to your engine's service manual or parts diagram to identify the relay's mounting position.
3. Disconnect electrical connectors: Carefully unplug all wire harness connectors attached to the old relay assembly.
4. Remove mounting hardware: Unbolt or unclip the old relay from its bracket or mounting surface.
5. Compare parts: Verify that the new relay assembly matches the original in connector type, mounting points, and overall dimensions.
6. Mount the new relay: Secure the replacement relay assembly in the same position using the original mounting hardware.
7. Reconnect electrical connectors: Plug all wire harness connectors into the new relay, ensuring each connection is fully seated and secure.
8. Reconnect the battery: Attach the negative terminal and ensure a solid connection.
9. Test engine operation: Start the engine and verify that ignition timing, idle, and throttle response are normal.
10. Inspect for issues: Check for any warning lights, unusual sounds, or electrical faults during initial operation.

Troubleshooting & FAQ

Q: How do I confirm this relay assembly fits my Honda engine?
A: Cross-reference your engine's model number with the compatibility table above. Verify that your original relay bears part number 38580-ZY9-003 or 38580-ZY9-023 to ensure a perfect match.

Q: What are the signs that my main relay assembly is failing?
A: Common symptoms include intermittent starting problems, engine stalling at idle, loss of ignition spark, or complete electrical failure. If you experience these issues, test the relay with a multimeter or replace it as a precautionary measure.

Q: How often should I replace the main relay assembly?
A: Main relays typically last many years under normal conditions. Replace only when you experience ignition system failures or electrical anomalies that testing confirms are relay-related.

Q: Will this aftermarket relay perform the same as the original Honda part?
A: Yes. This relay is manufactured to OEM specifications with comparable materials and design, ensuring proper switching characteristics, heat tolerance, and electrical performance for Honda EFI systems.

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.