Brand new aftermarket ignition trigger sensor assembly (timer base) for Mercury and Mariner 2-cylinder outboard motors. Factory-tested to meet or exceed OEM specifications for precise timing advance, smooth idle, and reliable high-RPM spark.DIRECT INTERCHANGE PART NUMBERS:
• Mercury / Quicksilver: 99021A14, 99021A11
• CDI Electronics: 134-9021-2
• WSM: 363-9021-2 / 363-9021-2A1ENGINE COMPATIBILITY:
• Fits Mercury & Mariner 30 HP and 40 HP (2-Cylinder, 2-Stroke) outboard models equipped with TPM modules (typical years 1994–1999)
• Designed for standard factory wiring harness plug-and-play installationKEY FEATURES:
• High-grade temperature-resistant wiring harness and factory-style connector pin
• Fully potted epoxy housing resists harsh saltwater, moisture, and engine vibration
• Solves common weak-spark, misfiring, timing drop, and hard-starting issuesSHIPPING:
• Ships fast and free directly from our US facility
• Packed securely with tracking provided immediately upon shipmentPlease confirm your outboard\'s model year, horsepower, cylinder count, and existing OEM part number before ordering to verify exact fitment.
