Sierra Regulator/Rectifier for Johnson Evinrude Outboard Motors, 35-Amp, 18-99409

The Sierra 18-99409 is a 35-amp voltage regulator/rectifier built for Johnson and Evinrude outboard motors. It is part of the charging circuit on the outboard, where it manages the electrical output from the stator so the motor's battery and onboard electronics receive properly regulated direct current at a safe, consistent amperage. A regulator/rectifier of this type performs two jobs in one housing: it converts the alternating current generated by the outboard's stator into direct current, and it regulates that output so voltage stays within a safe range as engine RPM changes, protecting the battery and connected electrical components from overcharging.

Sierra produces this part as a replacement charging-system component for Johnson and Evinrude outboard applications, sized to handle a 35-amp charging load. It is cataloged under Sierra's Evinrude outboard rectifier regulator line and is built to the physical and electrical specifications needed for a direct fit in that charging system role. At 1.1 pounds, it is a compact, self-contained unit intended to mount within the outboard's electrical compartment.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99409
• Product Category: Evinrude Outboard Rectifier Regulator
• Application: Johnson Evinrude outboard motors
• Amperage Rating: 35 Amp
• Weight: 1.1 pounds
• UPC: 808282394400

Fitment

• Johnson outboard motors
• Evinrude outboard motors

Frequently Asked Questions

What is the Sierra 18-99409 used for? It is a voltage regulator/rectifier for the charging system on Johnson and Evinrude outboard motors, converting the stator's AC output to regulated DC current.

What amperage does the Sierra 18-99409 regulator/rectifier handle? The Sierra 18-99409 is rated for a 35-amp charging load.

Which outboard brands is the Sierra 18-99409 designed for? It is built for Johnson and Evinrude outboard motors.

Who manufactures part number 18-99409? Sierra manufactures this regulator/rectifier under part number 18-99409.

How much does the Sierra 18-99409 weigh? This regulator/rectifier weighs 1.1 pounds.

What does a regulator/rectifier like the Sierra 18-99409 actually do? It converts the alternating current produced by the outboard's stator into direct current and regulates the voltage so the battery and electrical system are not overcharged as engine RPM varies.

What is the UPC for the Sierra 18-99409? The UPC for this Sierra part is 808282394400.

What category does the Sierra 18-99409 fall under? Sierra lists 18-99409 in its Evinrude outboard rectifier regulator category, covering charging-system components for Johnson and Evinrude outboards.

Is the Sierra 18-99409 an OEM Johnson or Evinrude part? No, 18-99409 is a Sierra-branded replacement part made for Johnson and Evinrude outboard charging systems.