MSD 83506 Ford Ready-to-Run Marine Distributor - 351C-460

The MSD 83506 Ready-to-Run Marine Distributor is a complete, drop-in ignition upgrade engineered specifically for Ford 351C, 351M, 400, 429, and 460 cubic inch marine engines. Designed to replace worn-out breaker points or weak factory ignition systems, this distributor delivers reliable, high-output spark performance right out of the box — no separate MSD ignition control box required.

Key Features:

• Marine Certified: Built and certified for marine use, ensuring safe and compliant operation in boat applications
• Built-In Ignition Module: A powerful ignition module is integrated directly into the billet aluminum housing, eliminating the need for an external ignition control box
• High-Output Inductive Spark: Produces a stout inductive spark that improves fuel mixture combustion for quicker starts, smoother idle, and enhanced mid-range performance
• Maintenance-Free Magnetic Pickup: A precision magnetic trigger housed beneath the durable bolt-down, injection-molded cap delivers accurate trigger signals with zero adjustment required
• Oversized Shaft with Sealed Ball Bearing: Provides long-term durability and smooth, reliable rotation in demanding marine environments
• Easy-to-Adjust Mechanical Advance: Tune the timing curve to your specific application using the included advance springs and stop bushings
• Simple 3-Wire Installation: Just drop it into the engine, connect three wires, and you're ready to run — no complicated wiring or additional components needed
• HEI/Breakerless Trigger Style: Standard rotation with a Male/HEI cap style for broad compatibility
• Cast Iron Distributor Gear: Durable iron gear compatible with Ford 351C, 351M, 400, 429, and FE engines

What's Included: Distributor cap, rotor, gear, and Weathertight wiring harness — everything needed for a complete, ready-to-run installation.

The MSD 83506 is an ideal ignition solution for performance marine applications running Ford big-block and Cleveland-series engines, delivering the proven reliability and ignition performance that MSD is known for on the water.