21066-3718 Voltage Regulator for Kawasaki Ultra 310X SE 1500 2014-2019

Voltage Regulator for Kawasaki Ultra 310X SE

This voltage regulator keeps the charging system on your Kawasaki Ultra 310X SE 1500 running at a steady output, replacing OEM cross-reference 21066-3718 so the battery stays charged and the electronics stay stable.

Overview

This voltage regulator for Kawasaki is a direct-fit replacement for the OEM 21066-3718 regulator used on Ultra 310X SE 1500 watercraft. It controls charging voltage so the battery, ECU, and accessories receive consistent power instead of spikes or drops. Built for riders who want a dependable replacement regulator for Kawasaki personal watercraft without paying OEM pricing.

Built For Performance

• Regulates charging output to protect the battery and electrical components
• Direct replacement for OEM part number 21066-3718
• Solid-state construction resists vibration and moisture in marine use
• Sealed housing helps keep water and debris out of internal circuitry
• Plug-in style connector matches factory wiring for a simple install

Fits These Machines

• for Kawasaki Ultra 310X SE 1500, 2014-2019

On-The-Job Use

• Replacing a failed regulator that is overcharging or undercharging the battery
• Restoring charging output on a personal watercraft that will not hold a charge
• Routine electrical maintenance on a Kawasaki Ultra 310X SE
• Keeping gauges, lights, and ignition systems powered reliably on the water

Specs At A Glance

Good To Know

Q: How do I know if my regulator has failed? A: Common signs include a battery that will not stay charged, dim or flickering lights, and erratic gauge readings. Testing charging voltage with a multimeter confirms whether the regulator is the fault.

Q: Is this an original Kawasaki part? A: No, this is an aftermarket voltage regulator made to replace OEM part 21066-3718. It is not manufactured or endorsed by Kawasaki.

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