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MSD

MSD 6564 Digital 6M-3L Marine Ignition Box

Part # 6564 Be the first to write a review

Marine certified, digital capacitive discharge ignition with built-in rev limiter and start retard.

MSD 6564 Digital 6M-3L Marine Ignition Box

Estimated Ship Date: 06/08/2026
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$599.95
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3

Emissions

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

See Emissions Details
We've raised the bar and added an all-new UL listed marine ignition box to our lineup. The 6M-3L is a fully sealed unit with a single wiring connector makeing installation neat and easy.

Three rotary dials and an LED display simplfy setting the cylinder select, start retard and rev limiter. Plug-in rev limiter chips and hard to read dials are a thing of the past. For diagnostic purposes, the LED display can also be set to a live tach mode on V8's and even display battery voltage with the turn of a knob.

The 6M-3L is a capacitive discharge ignition that multi-sparks from idle to 3,000 RPM providing a clean idle and quick throttle response. Above 3,000, capacitive discharge sparks will run clean through 12,000 RPM . Boasting more features and higher spark energy than its predecessor, the 6M-3L is the performance upgrade your boat needs!

Features:

  • Large, easy to read LED display
  • Shift interrupt feature eases shifting
  • MSD’s smoothest rev limiter yet, protecting parts and saving your engine
  • Records highest RPM the engine turned for last 20 minutes of run time
  • Easy setup of features with three rotary dials on the face of the unit
  • Built-in Start Retard adjustable in 0⁰, 10⁰ or 20⁰ increments for quick, easy starts and extend starter life
  • LED display shows rev limit, highest RMP turned, cylinder select, start retard, battery voltage and can be set to tach mode
  • Full delivery of spark energy and easy starting down to 6 volts battery supply
  • Highly efficient, low current draw for extended battery life
  • Fully potted housing to withstand demanding marine conditions
  • Sealed connector for clean wiring and trouble-free operation
  • Works on 4, 6 and 8 cylinder engines
  • Reverse polarity and overheat protection provide ultimate reliability
  • Can be triggered by magnetic pickup, amplifier, and points inputs
Brand MSD
Emission Code3
Product TypeIgnition Controllers
WarrantyManufacturer's Limited 1 Year
UPC085132065646
Manufacturer Part Number6564
Part Number6564
3

This part is legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles and Racing Use Only Vehicles.

The following vehicles are considered Uncontrolled (Non-Emissions Controlled) Vehicles:

  • 1965 and older U.S. manufactured California Certified vehicles
  • 1967 and older U.S. manufactured Federally Certified vehicles
  • 1967 and older Foreign manufactured vehicle

The following vehicles are considered Racing Use Only Vehicles:

  • Racing Use Only Vehicles are vehicles that are used exclusively for competition and that are not registered and that may never be used on the street

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

The following vehicles are considered Emissions Controlled Vehicles:

  • 1966 and newer U.S. manufactured California Certified vehicles
  • 1968 and newer U.S. manufactured Federally Certified vehicles
  • 1968 and newer Foreign manufactured vehicle
Instructions for PN 6564
UL Certified
Manufacturer's Limited 1 Year: See Details
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    *Free Shipping & Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.

    Some parts are not legal for use in California or other states with similar regulations.