Electronic synchronizers work by comparing the pulse frequencies generated by the ignition systems, alternators, tachometer signal generators of dual engine installations. The synchronizer is hooked up to +12 vDC, Ground, and to each tachometer's signal source. By selecting the right synchronizer and setting the switch on the back to the correct position, you let the synchronizer compare the frequency of pulses sent per each engine's revolution. From this information, the synchronizer displays a variance in engine speed by swinging its pointer toward the slower engine.

The Dual Engine Synchronizer is designed to provide an extremely accurate indication of when the RPM's of both engines are the same - or when they are "synchronized".


  • Improves efficiency
  • Reduced vibration from engines
  • For Gas and Variable Ratio / Alternator type diesels only.

Gauge Sizes Available:
4" - Hole size: 3.375" (85mm)

Parts available
Catalog # Factory # Description