Sierra Ignition Stator 18-99279, 4 Amp, for Johnson Evinrude Outboards, Replaces 584954

The Sierra 18-99279 is a 4 amp ignition stator built as a direct replacement for Johnson and Evinrude outboard ignition systems. The stator is a core component of the outboard's charging and ignition circuit, generating the AC current that powers the ignition system and, on charging-equipped systems, helps maintain battery charge while the engine runs. A worn or failing stator commonly shows up as hard starting, weak or intermittent spark, stalling at low RPM, or a no-charge condition at the battery, and replacing it with a properly rated unit restores consistent ignition output.

This is a 4 amp output stator, matched to the amperage rating of the ignition system it is designed to service, and it ships as a single unit (package quantity of 1) ready to install in place of the original component. It is cross-referenced to the same part used under CDI Electronics part number 1734954 and Evinrude part number 584954, so buyers who have identified either of those numbers on their outboard can confirm the Sierra 18-99279 is the correct equivalent replacement.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99279
• Amperage: 4 Amp
• Weight: 2.2 pounds
• Package Quantity: 1
• Compatible Engine Brands: Johnson, Evinrude

Fitment

Designed for Johnson and Evinrude outboard engines using a 4 amp ignition stator.

Replaces (OEM)

• 1734954
• 584954

Frequently Asked Questions

What is the amperage rating of the Sierra 18-99279 stator? The Sierra 18-99279 is rated at 4 amps, matching the output needed for the Johnson and Evinrude ignition systems it is designed to replace.

Will the 18-99279 stator fit my Johnson or Evinrude outboard? This stator is built for Johnson and Evinrude outboard ignition systems that use a 4 amp stator, and it cross-references directly to Evinrude part number 584954.

Is the Sierra 18-99279 the same part as CDI Electronics 1734954? Yes, the Sierra 18-99279 is the equivalent part to CDI Electronics part number 1734954, so either number can be used to confirm you have the correct replacement stator.

How much does the 18-99279 stator weigh? It weighs 2.2 pounds.

How many stators come in the package? The Sierra 18-99279 ships as a single unit, a package quantity of 1.

What are the symptoms of a failing outboard stator? A failing stator on a Johnson or Evinrude outboard typically causes hard starting, weak or intermittent spark, stalling at low RPM, or a loss of charging output at the battery, all of which point to replacing the stator with a unit like the 18-99279.

Is 584954 the Evinrude number for this stator? Yes, 584954 is listed as the Evinrude number that the Sierra 18-99279 replaces.

Does the 18-99279 stator include installation hardware? The listing covers the stator itself as a single-unit replacement part; no additional hardware is specified in the product information.

Can I use the Sierra 18-99279 as a direct swap for my original stator? Yes, it is designed as a direct replacement for the original 4 amp stator on applicable Johnson and Evinrude outboards, matching the OEM cross-reference numbers 1734954 and 584954.

What ignition function does the 18-99279 stator perform? The stator generates the AC current that powers the outboard's ignition system, which is why a weak or failed stator commonly causes ignition and charging problems on Johnson and Evinrude engines.