21066-3718 Voltage Regulator for Kawasaki STX-15F 1500 2004-2019

Voltage Regulator for Kawasaki STX-15F 1500

The voltage regulator for Kawasaki STX-15F 1500 keeps charging voltage steady so the battery stays charged and the electrical system stays reliable; it is a direct replacement for OEM 21066-3718.

Overview

This voltage regulator is a direct replacement part for the Kawasaki STX-15F 1500 jet ski, covering the long 2004 through 2019 model run. It manages charging output and guards the battery and electronics against voltage spikes, matching the 21066-3718 reference. Riders replacing a failed regulator get dependable charging for gauges, lights, and ignition.

Built For Performance

• Direct replacement for OEM part number 21066-3718
• Regulates charging voltage to protect the battery and electronics
• Solid-state construction with no moving parts to wear out
• Sealed housing resists water spray and vibration
• Plug-in connector layout matches the original harness

Fits These Machines

• for Kawasaki STX-15F 1500, 2004-2019

On-The-Job Use

• Replacing a failed or weak charging regulator on the STX-15F
• Restoring steady voltage to gauges, lights, and ignition
• Routine electrical maintenance across 2004-2019 models
• Keeping the battery charged during extended rides

Specs At A Glance

Good To Know

Q: Does this regulator cover all STX-15F years? A: It is listed for the STX-15F 1500 from 2004 through 2019 and matches the 21066-3718 reference. Confirm your model year and part number before ordering.

Q: What causes a regulator to fail? A: Heat, vibration, and water exposure can degrade the internal electronics over time. Replacing the regulator restores stable charging voltage.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.