CDI Electronics, LLC is a leading manufacturer of electronic engines and direct-current charging components for maritime and industrial applications. The company provides better ignition and diagnostic solutions and repair services to engine users and manufacturers. The ignition system is alternator-driven capacitor discharge. Flywheel, stator, trigger, capacitor-discharge modules (CDM), and spark plugs are components of the ignition system. The AC voltage is then transferred to the capacitor discharge module (CDM) and stored in a capacitor. CDI Electronics is the finest choice for Mercury Timing Protection! Key Features: Fits Mercury/Mariner engines with 30 and 40 Horsepower from 1994 to 1995 with a three-wire CDM module OEM Style Timing Protection Module with High Performance. Timing Protection Modules meet or exceed OEM specifications. Provides Higher Quality at an Unbeatable Price Installation is simple Processing and approval are required. High-quality materials used Provides long-term timing protection for your boat's sailing Specifications: Brand: CDI Electronics SKU: 144-3251A5 UPC: 736983851734 Weight: 0.80 LBS Manufacturer Part Number (MPN): 144-3251A 5 Condition: New Type: Ignition Repair Parts Hazard Code Land: 9 Country of Origin: United States Replaces Products: 667-1443251A, 5, 736983851734, 823251A5, 144-3251A 1994-1995 (30 & 40HP) w/ 3 Wire CDM Module