Sierra CD Power Pack 18-99272 CDI Module USL Conversion Kit for Johnson Evinrude OMC Outboards

The Sierra 18-99272 is a CD (capacitor discharge) power pack and CDI module, supplied as a USL conversion kit for Johnson, Evinrude, and OMC outboards. It replaces the outboard's original capacitor discharge ignition power pack, supplying the switched high-voltage pulses that fire the ignition coils and keep the engine running on a stable, properly timed spark. As a conversion kit, it is built to update or replace the ignition module on outboards using the USL ignition system, restoring reliable starting and running performance when the factory power pack has failed or is no longer serviceable.

The kit ships complete and ready to install as a direct power pack replacement, with a package quantity of one unit. It is intended for outboard owners and marine technicians performing an ignition system repair or upgrade on Johnson, Evinrude, and OMC engines equipped with the USL setup.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99272
• Product Type: CD Power Pack / CDI Module (USL Conversion Kit)
• Fits: Johnson, Evinrude, and OMC outboards with USL ignition
• Package Quantity: 1
• Weight: 1.36 pounds
• UPC: 808282395612

Fitment

• Johnson, Evinrude, and OMC outboards equipped with the USL ignition system

Replaces (OEM)

• 113-4488

Frequently Asked Questions

What is the Sierra 18-99272 power pack used for? It is a CD (capacitor discharge) power pack and CDI module that supplies the ignition coils on Johnson, Evinrude, and OMC outboards, replacing the factory power pack when it fails or needs updating.

Does 18-99272 fit my Johnson or Evinrude outboard? The 18-99272 power pack is designed for Johnson, Evinrude, and OMC outboards equipped with the USL ignition system, since it is supplied as a USL conversion kit.

Is this a USL conversion kit or a direct factory-style replacement? The 18-99272 is sold as a USL conversion kit, meaning it is intended to update or replace the CD power pack on outboards using the USL ignition setup.

How much does the 18-99272 power pack weigh? The Sierra 18-99272 CD power pack weighs 1.36 pounds.

What OEM part number does 18-99272 cross-reference? Sierra part number 18-99272 corresponds to CD power pack / CDI module 113-4488.

How many units come in the package? The 18-99272 kit ships with a package quantity of one power pack unit.

What does a CD power pack do on an outboard? A CD power pack stores and discharges high-voltage electrical energy to fire the ignition coils at the correct moment, which is what the 18-99272 does for Johnson, Evinrude, and OMC outboards.

Is the 18-99272 power pack new or remanufactured? The 18-99272 CD power pack is supplied as a new unit, not a rebuilt or remanufactured module.

What is the UPC for the Sierra 18-99272? The Sierra 18-99272 CD power pack carries UPC 808282395612.

Can I install the 18-99272 power pack myself? The 18-99272 is a bolt-in style CD power pack replacement for the outboard's existing ignition module location, suitable for a technician or experienced DIY installer working on Johnson, Evinrude, or OMC engines with USL ignition.