Sensor Pickup for Mercruiser Thunderbolt Electronic Ignition 87-861780A2 BPI18-5116

Ignition Sensor for Mercruiser Thunderbolt Electronic Ignition Systems.

It is for all Mercruiser Thunderbolt Distributors with nut or bullet connections used on V6 & V8 applications.

Replaces Merc. # 87-861780Q4, 87-861780A2

Your current sensor may only have two wires or terminals, this item has improved circuitry which incorporates a separate ground for improved performance and reliability.

Replaces Ring terminal sensor or bullet end connectors.

Troubleshoot This Part with these Instructions