Sierra Stator Coil Set 18-99306 for Mercury Mariner Outboards, Replaces CDI 174-6120K1

The Sierra 18-99306 Stator Coil Set is a replacement stator built for Mercury and Mariner outboard engines. The stator is a key part of the outboard's ignition and charging system, generating the AC voltage that the engine's electronics rely on to fire the ignition coils and, on many powerheads, to help supply charging current. A weak or failed stator commonly shows up as hard starting, engine misfire, intermittent power loss, or a no-spark condition, so a properly matched replacement stator is essential to restoring reliable ignition performance.

This stator is built as a coil pack installation with a female connector, matching the factory wiring configuration so it installs in place of the original unit without modification. It is designed for PWC (personal watercraft) outboard applications, giving boaters and technicians a direct replacement option when the factory stator has failed or is showing signs of weak output.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-99306
• Category: Mercury Outboard Stators & Triggers
• Weight: 0.2 pounds
• Vehicle Service Type: PWC
• Compatible with Vehicle Type: PWC
• Installation Type: Coil pack
• Connector Gender: Female

Fitment

Designed for Mercury and Mariner outboard engines.

Replaces (OEM)

• 174-6120K1

Frequently Asked Questions

What engines is the Sierra 18-99306 stator coil designed for? The Sierra 18-99306 stator coil set is designed for Mercury and Mariner outboard engines, specifically PWC (personal watercraft) applications.

Does the 18-99306 stator replace a CDI Electronics part? Yes, the Sierra 18-99306 stator cross-references to CDI Electronics part number 174-6120K1.

How much does the Sierra 18-99306 stator weigh? It weighs 0.2 pounds.

What type of connector does this stator use? The Sierra 18-99306 stator coil uses a female connector.

Is this a coil pack style installation? Yes, the 18-99306 is installed as a coil pack style stator, matching the factory mounting and wiring configuration.

What are the symptoms of a failing stator on a Mercury or Mariner outboard? A failing stator commonly causes hard starting, engine misfire, intermittent loss of power, or a no-spark condition, and replacing the stator with a properly matched unit like the Sierra 18-99306 typically resolves these ignition issues.

Is the Sierra 18-99306 an OEM or aftermarket stator? The 18-99306 is an aftermarket replacement stator sold under the Sierra part number, built to replace the original equipment stator on compatible Mercury and Mariner outboards.

Can this stator be used on PWC outboard engines? Yes, the Sierra 18-99306 stator coil set is designated for PWC (personal watercraft) vehicle service applications.

What does the stator do on a Mercury or Mariner outboard? The stator generates the AC voltage used by the outboard's ignition system to fire the ignition coils, making it a core component of the engine's electrical system.

Does the Sierra 18-99306 come as a complete stator coil set? Yes, it is sold as a complete stator coil set, part number 18-99306, ready to install as a direct replacement.