B. Ignition Sensor Kit for MerCruiser Thunderbolt I IV Distributor

Sierra International 18-5273 Medium Tune Up Kit

Sierra 18-5438 Ignition Coil

Boise Boat Works Distributor Cap and Rotor Kit for Mercruiser 4.3 Engines with Thunderbolt I and IV ignitions

Mercruiser Thunderbolt Ignition Coil 4.3 5.0 5.7 305 350 V6 V8 Mercury Marine

Replacement Inboard Ignition Coil - Fits MerCruiser Thunderbolt IV and V Ignition Systems with HEI - Replaces Sierra 18-5438, Mercury 392-805570A2, 392-7803A4, 392-805570A1, GLM 72115, PerTronix 40511

Quicksilver 805759Q3 Distributor Cap Kit - Marinized V-8 Engines by General Motors with Thunderbolt IV and V HEI Ignition Systems

Quicksilver 898264001 AC Delco MR43T Spark Plug, 1-Pack

Boise Boat Works Distributor Cap and Rotor Kit for Mercruiser 5.0, 5.7, 7.4, 8.2 Engines

Thunderbolt Distributor Cap and Trigger Wheel Rotor Kit with Gasket and Screws for Mercruiser 5.0, 5.7, 7.4, 8.2 V8 Engines

Spark Plug Wire Set for Mercruiser V8 Thunderbolt Delco EST Replaces 84-816608Q61