Engine Sychronizers, Tach Sender Extension - 2 Required for Sychronizer

The Glendinning Automatic Engine Synchronizer is vital on twin engine boats, not only for the purpose of increased efficiency, but also to eliminate the annoying noise and vibration cause by engines operating at different RPMs.
• Automatic synchronization - unlike synchronizing lights and gauges, the Glendinning Automatic Synchronizer adjusts engine speed automatically and continually, without any effort on the part of the boat operator
• Single lever control for two engines - when the synchronizer is on, it will adjust the speed of the slave engine to exactly match the lead engine speed; the boat operator can then control the speed of both engines by merely adjusting the speed of the master engine
• Compatible with all types of engines and controls - adapters are available for interfacing the synchronizer with virtually every engine or control system, including push-pull, hydraulic, pneumatic and electronic controls.
• Very dependable - over 25,000 synchronizers currently operating throughout the world; some units have been operating since the product's initial release