Sierra 18-5108 Pick Up Coil Sensor for Marine Delco HEI Ignition

The Sierra 18-5108 Pick Up Coil Sensor is a critical ignition system component designed for marine engines equipped with Delco HEI (High Energy Ignition) electronic distributors. This sensor works inside the distributor to generate the timing signal that triggers the ignition module, eliminating the need for traditional points and condensers in electronic ignition systems.

Key Features:

• Designed for GM 4-cylinder, V6, and V8 marine engines with Delco HEI ignition systems
• Compatible with Delco electronic ignition distributors manufactured prior to 2002
• Includes retaining clip for secure installation
• Manufactured to meet or exceed OEM specifications for reliable marine performance
• Direct replacement for original equipment parts

OEM Cross-References:

• Replaces Mercury Marine 811639, 811639T
• Replaces OMC 3854001, 986642
• Replaces Volvo Penta 3854001

This pickup coil sensor is commonly used on MerCruiser, OMC Cobra, Volvo Penta, and other marine sterndrives and inboard engines. Installation requires removal of the distributor for proper timing alignment after reassembly. Sierra marine parts are engineered to withstand harsh marine environments and deliver dependable performance.