# Yamaha Regulator Rectifier 15-405 – SBT OE Replacement
The **Yamaha Regulator Rectifier 15-405** is a new aftermarket OE replacement electrical component manufactured by **SBT**, designed for compatible **Yamaha GP 1200 and XL 1200** personal watercraft.
This regulator/rectifier replaces Yamaha OEM part number **6H2-81960-00-00**, providing a replacement option for worn, damaged or faulty original charging system components.
The regulator/rectifier plays an important role in the watercraft’s electrical system by helping regulate charging voltage and convert alternating current (AC) into direct current (DC) for battery charging and onboard electrical operation.
Whether you’re troubleshooting a charging issue, replacing a faulty original component or restoring an older Yamaha WaveRunner, the SBT 15-405 provides a practical OE replacement solution.
## Product Details
– **Brand:** SBT
– **SKU:** 15-405
– **Product Type:** Voltage Regulator / Rectifier
– **Application:** Yamaha Personal Watercraft
– **Compatible Models:** Yamaha GP 1200 / XL 1200
– **Replaces OEM:** 6H2-81960-00-00
– **Replacement Type:** Aftermarket OE Replacement
– **Condition:** New
## Compatible Yamaha Models
The **Yamaha Regulator Rectifier 15-405** is listed for compatible applications including:
– Yamaha GP 1200
– Yamaha XL 1200
**Important:** Exact compatibility may vary depending on the model year and electrical system configuration.
Please confirm the original OEM part number and electrical connectors before purchasing.
## Features & Benefits
– **SBT Replacement Component:** New aftermarket regulator/rectifier manufactured by SBT.
– **Yamaha GP & XL Applications:** Listed for compatible GP 1200 and XL 1200 models.
– **OE Replacement:** Replaces Yamaha OEM part number 6H2-81960-00-00.
– **Voltage Regulation:** Helps maintain the charging system’s intended voltage.
– **AC to DC Conversion:** Converts generated alternating current into direct current.
– **Charging System Repairs:** Suitable for replacing a damaged or faulty original regulator/rectifier.
– **Electrical Maintenance:** Useful when repairing or maintaining compatible Yamaha electrical systems.
– **Restoration Projects:** Suitable for servicing older Yamaha WaveRunner models.
## What Does a Regulator Rectifier Do?
The **Yamaha Regulator Rectifier 15-405** performs two important functions within the watercraft’s electrical charging system.
### Voltage Regulation
The regulator helps control the electrical voltage generated by the engine’s charging system.
Correct voltage regulation is important for maintaining battery charging and protecting onboard electrical components from excessive voltage.
### AC to DC Conversion
The rectifier converts alternating current (AC) generated by the engine into direct current (DC).
This allows the electrical energy produced by the charging system to be used by the battery and compatible onboard electrical components.
Together, these functions support normal charging system operation.
## Signs of a Faulty Regulator Rectifier
A damaged or failing regulator/rectifier may cause a range of charging and electrical problems.
Common symptoms include:
– Battery not charging correctly
– Battery repeatedly going flat
– Charging voltage outside the recommended range
– Intermittent electrical problems
– Difficulty starting due to low battery charge
– Overcharging or undercharging
– Electrical components behaving unexpectedly
These symptoms may also be caused by a faulty battery, stator, wiring or poor electrical connections.
Proper electrical testing is recommended before replacing the regulator/rectifier.
## Why Replace Your Yamaha Regulator Rectifier?
Personal watercraft electrical components operate in environments where moisture, vibration and heat can contribute to deterioration over time.
A faulty regulator/rectifier can affect the charging system and prevent the battery from charging correctly.
Replacing a defective unit with a compatible OE replacement helps restore the electrical system’s intended operation.
The **Yamaha Regulator Rectifier 15-405** provides an SBT aftermarket replacement for Yamaha OEM part number 6H2-81960-00-00.
## Important Installation Information
Before installing the replacement regulator/rectifier:
1. Disconnect the battery before working on the electrical system.
2. Confirm that OEM 6H2-81960-00-00 matches your original component.
3. Inspect the wiring harness and electrical connections.
4. Compare the replacement unit’s connectors and mounting arrangement.
5. Remove the faulty regulator/rectifier.
6. Install the new component according to the applicable Yamaha service manual.
7. Ensure all electrical connections are secure.
8. Reconnect the battery and verify charging system operation.
Professional installation is recommended if you are unfamiliar with marine electrical systems.
## Important Fitment Information
**Brand:** SBT
**SKU:** 15-405
**Product:** Regulator / Rectifier
**Compatible Models:** Yamaha GP 1200 / XL 1200
**Replaces OEM:** 6H2-81960-00-00
**Condition:** New
Please confirm your exact Yamaha model, model year, original OEM part number and electrical connector configuration before ordering.
This listing is for the **regulator/rectifier only**. Other electrical charging system components are not included unless specifically stated.
The **Yamaha Regulator Rectifier 15-405** is a new SBT aftermarket OE replacement designed for compatible Yamaha GP 1200 and XL 1200 personal watercraft, providing a suitable solution for charging system maintenance, electrical repairs and restoration projects.
