1. Personal Watercraft Parts Products
  2. sku: 10707830569558771
  3. YAMAHA 21066-3701

YAMAHA 21066-3701 Electrical Voltage Regulator Rectifier Assfty

fits model: Js300. make: Kawasaki, Yamaha. year: 1986–1988.

21066-3701 Yamaha 1986-1988 Kawasaki Js300 Oem Electrical Voltage Regulator Rectifier Assfty

( Brand: Yamaha ), ( Manufacturer Part Number: 21066-3701 ), ( Part Type: Voltage Regulator Rectifier )

Review YAMAHA Kawasaki Oem Electrical Voltage Regulator Rectifier Assfty fits JS300 1986–1988

The Yamaha 21066-3701 is a high-quality voltage regulator rectifier specifically designed for use with Kawasaki JS300 jet skis manufactured between 1986 and 1988. This essential component of the electrical system ensures that the voltage delivered to the battery remains within an optimal range, preventing overcharging or undercharging.

The regulator rectifier is built with robust materials to withstand the rigors of marine use. The housing is made of durable, corrosion-resistant plastic, while the internal components are protected by a sealed design to prevent water intrusion. This design not only enhances the longevity of the part but also provides peace of mind to the user, knowing that their electrical system is securely safeguarded.

The regulator rectifier employs a self-adjusting voltage regulator feature, which allows it to adapt to various charging conditions and maintain the correct voltage level consistently. This feature is crucial, as an inconsistent voltage level can negatively impact the performance and lifespan of the battery and other electrical components.

The Yamaha 21066-3701 voltage regulator rectifier also features a built-in diode that converts the alternating current (AC) produced by the jet ski's engine into direct current (DC) for charging the battery. This diode ensures that the battery is charged efficiently and effectively, maximizing the overall performance of the electrical system.

In summary, the Yamaha 21066-3701 voltage regulator rectifier is a vital component for maintaining the optimal electrical performance of Kawasaki JS300 jet skis manufactured between 1986 and 1988. Its robust construction, self-adjusting voltage regulator feature, and built-in diode make it an ideal replacement for aging or failed components, ensuring reliable and efficient operation for years to come.

Pros and Cons of Buying a Yamaha 21066-3701 (Kawasaki JS300) Electrical Voltage Regulator/Rectifier

1. Pros:

- OEM Part: This voltage regulator/rectifier is an original equipment manufacturer (OEM) part designed specifically for the Kawasaki JS300 model, ensuring a proper fit and function.

- Reliability: As an OEM part, it is engineered to meet the performance standards of the original equipment, providing a reliable solution for the electrical system.

- Improved Performance: A faulty voltage regulator/rectifier can cause poor battery charging, which may lead to decreased performance or even immobilization of the watercraft. Replacing it with a new one can restore the electrical system to its optimal condition, improving overall performance.

- Safety: A malfunctioning voltage regulator/rectifier can potentially create a fire hazard due to overheating or voltage spikes. Installing a new one can help mitigate these risks.

- Warranty: OEM parts often come with warranties, providing peace of mind and protection against manufacturing defects.

2. Cons:

- Cost: OEM parts, including voltage regulator/rectifiers, may cost more than aftermarket alternatives due to their brand name and higher quality.

- Availability: Depending on the specific model year and availability, it may take some time to source and receive the part.

- Installation Complexity: Installing a voltage regulator/rectifier may require specialized tools and knowledge, potentially adding to the overall cost if professional installation is necessary.

Conclusion:

Buying a Yamaha 21066-3701 (Kawasaki JS300) Electrical Voltage Regulator/Rectifier is an investment in the reliability and performance of your watercraft. While it may come with a higher price tag than aftermarket alternatives, the benefits of an OEM part, such as improved performance, safety, and warranty, can make it a worthwhile expense. Additionally, the part's specific design for the Kawasaki JS300 model ensures a proper fit and function, reducing the risk of compatibility issues.

Recommendation:

If you are experiencing electrical issues with your Kawasaki JS300 and are looking for a reliable and effective solution, we recommend considering the purchase of a Yamaha 21066-3701 Electrical Voltage Regulator/Rectifier. While the upfront cost may be higher than aftermarket alternatives, the benefits, such as improved performance, safety, and warranty, can make it a worthwhile investment for your watercraft.

Details:

Semi # 7 ROEBLING 09/21/25 Kawasaki 134x.

part #: 210663701 price

  • $100.00

specifications perwatercraft:

  • for models: Js300
  • for makes: Kawasaki, Yamaha
  • for years: 1986-1988
  • brand: Yamaha
  • mpn: 21066-3701
  • part type: Voltage Regulator Rectifier

general perwatercraft:

  • condition: Used
  • Parts Accessories > Personal Watercraft Parts > Other Parts

seller perwatercraft:

  • # reviews: 8534
  • city: Lake Placid, Florida
  • rating: 99.9%

shipping perwatercraft:

  • transit: 3-9 Days
  • carrier: USPS
  • class: Standard
  • service: USPS Ground Advantage
  • type: Fixed
  • cost: $10.00

offer perwatercraft:

  • options: Ship-to-home
  • started: February 11, 2026
  • sold: 0
  • quantity: 1
  • availability: In Stock

payments perwatercraft:

  • other
  • wallet: Apple-pay
  • credit card: Visa

returns perwatercraft:

  • policy: Returns Accepted
  • time: 30 Days
  • paid by: Buyer
for models: js300, for makes: kawasaki, yamaha, for years: 1986-1988, part type: voltage regulator rectifier,
category: watercraft parts > parts, sku: 10707830569558771,

Yamaha 21066-3701 Is Similar To:

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1 offer $100.00 USD
  • Offer #1: $100.00 price + $10.00 shipping estimate = $110.00* total. NOTHING MORE OR NOTHING LESS. 1976-1995 Kawasaki JS 300.+$10.00 shipping

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