Sierra 18-5105 Marine Ignition Module for Chrysler Inboard Engines

The Sierra 18-5105 is a replacement 5-prong ignition module designed for Chrysler small block marine engines with Prestolite electronic distributors from 1983 and up. This Sierra product meets or exceeds the original equipment part it replaces, ensuring reliable engine performance and proper spark timing control.

Key Features:

• 5-prong connector design for Prestolite electronic distributor systems
• Engineered to OEM specifications for precise ignition control
• Fits Chrysler LM318, M340, and M360 marine engines from 1983 to present
• Compatible with multiple engine models including 318, 340, 360, and 440 cubic inch displacements
• Works with Prestolite electronic distributors

Replaces OEM Part Numbers:

• Chrysler 4111850 and 3874020-1
• Chrysler 3874020
• Mallory 9-29809

This ignition module is essential for controlling the ignition system on Chrysler marine inboard engines, providing the critical switching function needed to fire the ignition coil at the proper timing intervals for optimal engine performance.