Sierra Power Pack 18-99346 for Johnson Evinrude CD3/6 Outboard Ignition Systems

The Sierra 18-99346 is a power pack built for Johnson Evinrude CD3/6 outboard ignition systems. The power pack is a core component of the capacitor discharge (CD) ignition circuit, working alongside the stator, trigger, and coils to generate and time the spark that fires each cylinder. When a power pack begins to fail, common symptoms include hard starting, misfiring, rough idle, loss of power at higher RPM, or a complete no-spark condition, so replacing it with a correctly matched unit restores reliable ignition timing and spark output. This unit is designated for CD3/6 applications and is intended as a direct replacement for the ignition power pack in that system.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99346
• Product Name: Johnson Evinrude Power Pack CD3/6
• Category: Evinrude Outboard Power Packs
• UPC: 808282398477
• Weight: 0.58 pounds

Frequently Asked Questions

What is the Sierra 18-99346 power pack used for? The Sierra 18-99346 is a power pack for Johnson Evinrude CD3/6 outboard ignition systems, supplying the timed electrical discharge that fires the ignition coils.

Which ignition system does part number 18-99346 fit? Part number 18-99346 is designated for the Johnson Evinrude CD3/6 capacitor discharge ignition system.

How much does the 18-99346 power pack weigh? The Sierra 18-99346 power pack weighs 0.58 pounds.

What is the UPC for the Sierra 18-99346 power pack? The UPC for the Sierra 18-99346 Johnson Evinrude CD3/6 power pack is 808282398477.

What are the symptoms of a failing power pack on a CD3/6 ignition system? Hard starting, misfiring, rough idle, loss of power at higher RPM, or no spark at all are typical signs that the power pack in a CD3/6 ignition system needs replacement.

Is the 18-99346 an original equipment part or an aftermarket part? The 18-99346 is sold under the Sierra brand as a power pack for the Johnson Evinrude CD3/6 ignition system.

Does the power pack come with the stator or ignition coils? No, the Sierra 18-99346 is the power pack component only; it does not include the stator, trigger, or ignition coils used elsewhere in the CD3/6 system.

Can the power pack be installed without special tools? The Sierra 18-99346 power pack mounts to the ignition system wiring harness of the CD3/6 setup using standard hand tools and connectors already present on the outboard.

What category of part is the 18-99346? The 18-99346 is listed in the Evinrude Outboard Power Packs category as an ignition component.

Why replace a power pack instead of the whole ignition system? If diagnosis points specifically to the power pack rather than the stator or coils, replacing just the Sierra 18-99346 power pack restores CD3/6 ignition function without the added cost of replacing the entire ignition system.