Overview Marine environments place rigorous demands on every component of the ignition system, especially the distributor. The combination of water spray, salt exposure, full throttle acceleration and harsh vibrations all take their toll. | For marine use, the distributor cap is bolted to the aluminum base. There are two flame arrestor holes with brass screens machined into the base of the distributor to prevent ignition of gas fumes that may build up in the engine compartment. A special Weathertight Connector is supplied to provide a positive-lock and water resistant connection. | The MSD Pro-Billet Distributor is the strongest and most accurate distributor you can put in your boat. The housing is CNC-machined from a billet of 6061-T6 aluminum creating a housing with no porosity. Internally, a QPQ coated shaft is guided by a sealed ball bearing and an extra long sintered bushing for highspeed stability. Each distributor uses MSD's race-proven magnetic pickup to trigger the ignition control. Mounted just above the pickup is a mechanical advance assembly that is easy to adjust so you can dial-in an ignition curve to match your boat's application (except PN 8366). | The Marine Pro-Billet Distributors have been tested by Underwriter's Laboratory and are certified to meet or exceed safety standards for marine ignition systems as set by the U.S. Coast Guard. Marine UL-Certified Features Easy-to-adjust mechanical advance with supplied springs and stop bushings Advance plate and weights are fine blanked from chrome moly steel and QPQ coated for friction reduction Must be used with an MSD Ignition Control Special oil tract improves lubrication to the distributor and cam gear Nylon pads ensure smooth operation of the advance weights Supplied with a bolt down HEI style distributor cap and rotor Mechanical advance assembly can be locked out for crank trigger systems Polished steel shaft is QPQ coated and guided by a sealed ball bearing and extra long sintered bushing Designed for use in marine applications with Chevy V8 automotive engines O-ring seals can be added to modified blocks to improve oil pressure control Maintenance-free magnetic pickup and precision reluctor create stable trigger signals throughout the rpm range Will not accept a vacuum advance canister Advance weight pins are staked and tig welded to the plate UL Approved Weathertight connectors are used for locked and sealed connections CNC machined billet aluminum housing and billet aluminum base with two flame arrestor holes with brass screens
