Sierra 18-99423 Timer Base for Johnson Evinrude V6 Outboard Engines

The Sierra 18-99423 Timer Base is a premium quality ignition component designed for Johnson and Evinrude 6-cylinder outboard engines. This timer base is a critical part of the electronic ignition system, working in conjunction with the power pack to control ignition timing and ensure proper engine performance.

Key Features:

• Designed for 1979-1988 Johnson/Evinrude 150, 155, 175, 185, 200, and 235 HP V6 engines
• Fits cross-flow engines equipped with twin power packs
• Premium quality construction for extended service life
• Meets or exceeds OEM manufacturer specifications
• Includes white glide ring and necessary installation hardware
• Features 4-pin Amphenol connector for power pack connection

OEM Replacement: This Sierra timer base directly replaces BRP part number 583377 (also 778472) and CDI part number 133-3377. It also supersedes OEM numbers 581985, 582122, 582356, 582357, 582371, 582394, 583129, and 584558.

Sierra marine ignition components are manufactured to rigorous quality standards and are backed by Sierra's limited lifetime warranty. Professional installation by a qualified marine technician is recommended for proper timing and system integration.