Review on 🔧 MerCruiser Thunderbolt Distributor Ignition Sensor Kit - 87-91019A3 Replacement | 4.3L, 5.0L, 5.7L, 7.4L, 8.2L Engine - Upgrade: 87-91019A2, 87-91019A6, 87-892150Q02, 87-861780Q4 - Ignition Pickups by Robert Tirona

Easy installation and solution to two annoying problems. Removing the old sensor required sanding the plastic case. Fixed starting problem, no start on my vintage 1985 cruisers. Baron Restoration Project 222. I also couldn't get the engine to run at half speed without stalling. Mercruiser 305 GM Crusader, 230 hp. At the same time I refreshed the coil, cover, rotor, wires and candles. The starter drew too much current and dropped the voltage below the 9 volts needed to signal the Thunderbolt ignition to start the coil. Reconditioned starter. Now the start is instant, 46 mph and the fuel consumption is doubled! It's funny how few people talk about this important sensor!