The ignition pickup is located inside the distributor and plays a role in triggering the ignition system to produce a spark. When something bad happens such as the engine stalling or not being able to start the boat, it means you need a new ignition sensor
The Ignition Sensor Kit is used on MerCruise Thunderbolt ALPHA, BRAVO, I IV, Gen VI, MR, MAG for 1981 - 1997 V-6 V-8 205 260 240 260 305 320 350 425 450 454 465 500 502 525 575 600, 4.3L 5.0L 5.7L 7.4L 8.2L Engines