Sierra 18-99425 Timer Base for Johnson Evinrude Outboard Engines

The Sierra 18-99425 Timer Base is a precision ignition component designed for Johnson and Evinrude outboard engines. This timer base is a critical part of the engine's ignition system, working in conjunction with the power pack to control spark timing and ensure proper engine performance.

Key Features:

• Direct replacement for BRP part number 763782
• Premium quality construction for extended service life
• Meets or exceeds OEM specifications
• Designed for professional marine mechanic installation
• Backed by Sierra's limited lifetime warranty

The timer base mounts inside the engine beneath the flywheel and includes a glide ring for proper seating in the bearing carrier. It connects to the power pack via a multi-pin connector and features a link arm for timing advance control. Sierra is a trusted name in marine ignition components, manufactured by Dometic for reliable performance in demanding marine environments.