6H0-81960-10 Rectifier Regulator for Yamaha 75C 80A 90A C90 | JLM Marine

Rectifier Regulator 6H0-81960-10 – Fits Yamaha 2-Stroke 75–90 HP Outboards

This aftermarket voltage regulator rectifier is engineered to fit Yamaha 2-stroke outboard motors from 75 HP to 90 HP, including the 75C, 80A, 90A, and C90 models manufactured between 2000 and 2017. It delivers reliable voltage regulation and charging performance for your engine's electrical system.

This unit serves as a direct replacement for Yamaha OEM part number 6H0-81960-10, offering plug-and-play installation with no modifications required.

• Plug-and-play design with factory-style connectors for direct fitment
• Improved heat sink and charging capabilities over stock units
• Pre-tested before shipment to ensure reliability

Part Number Cross-Reference

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

Compatible Engine Models

Confirm your engine model/year in the table below. For Yamaha owners, here's a guide to help you identify your engine's serial/model: Yamaha Serial Number Guide. You can also review exploded diagrams to verify part numbers: Yamaha Parts Diagrams & Catalog.

Technical Specifications

Package Contents

The package contains all the parts shown in the picture.

• 1× Voltage Regulator Rectifier

Installation Guide

1. Disconnect the battery – Remove the negative terminal first to prevent electrical shorts.
2. Locate the original rectifier regulator on your Yamaha outboard motor. It is typically mounted near the powerhead or electrical components.
3. Disconnect the wiring harness from the old regulator by carefully unplugging the connector(s).
4. Remove mounting fasteners securing the old rectifier to the engine using the appropriate socket or screwdriver.
5. Compare the new unit with the original to confirm mounting holes, connector configuration, and overall dimensions match.
6. Position the new rectifier in the same location and orientation as the original unit.
7. Secure with fasteners, tightening evenly to ensure good thermal contact with the mounting surface (which often acts as a heat sink).
8. Reconnect the wiring harness by firmly seating the plug(s) until you hear or feel a click.
9. Inspect all connections for security and ensure no wires are pinched or chafing against sharp edges.
10. Reconnect the battery, negative terminal last, and ensure all terminals are clean and tight.
11. Start the engine and verify charging voltage at the battery (typically 13.5–14.5V at idle with no load).
12. Test under load by running accessories and confirming stable voltage without fluctuations or overheating.

Troubleshooting & FAQ

Q: How do I confirm this rectifier fits my Yamaha outboard?
A: Cross-reference your engine's model and year with the compatibility table above. You can also verify the OEM part number (6H0-81960-10) using Yamaha's parts diagrams or your service manual.

Q: What are the signs that my rectifier regulator is failing?
A: Common symptoms include a dead or weak battery, flickering lights, erratic voltage readings (below 13V or above 15V while running), or the engine stalling due to insufficient charging.

Q: How often should I replace the rectifier regulator?
A: There is no fixed interval; replace it when you notice charging issues or electrical faults. Regular voltage checks and visual inspection for corrosion or burn marks can help catch problems early.

Q: Can I install this myself, or do I need a professional?
A: Installation is straightforward if you have basic mechanical skills and tools. However, if you're unfamiliar with marine electrical systems, professional installation is recommended to avoid damage.

Q: What's the difference between this aftermarket unit and the OEM part?
A: This is an aftermarket replacement part (not OEM). It is built to OEM specifications using comparable-grade materials and includes improved heat dissipation features. Production is done in an ISO9002-certified facility, and each unit is tested before shipment for reliable 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.