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Please Note: 03/30/21 - We are starting to see a slowdown in the supply chain. As a result, some items shown in-stock may be out of stock when you purchase them. This is due to the inconsistent updating of inventory from our manufactures and distributors. We are doing our best to update the inventory as soon as we receive information. If an item is not available when you purchase it we will notify you within one business day. 

Maretron NMEA 2000 Analog Engine Monitoring System EMS100-01

Brand: Maretron, Condition: Discontinued
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This product has been obsoleted by Maretron and is no longer in production.

 Click here to see our other Engine Monitoring Systems.

Maretron NMEA 2000 Analog Engine Monitoring System EMS100-01

 EMS100 - NMEA 2000® Engine Monitoring System

Maretron's EMS100 plugs directly into engine wiring harnesses and converts analog signals such as water temperature and oil pressure to the new marine digital interface (NMEA 2000®). Critical engine data is then distributed throughout the vessel over a single cable where it can be monitored by any NMEA 2000® compatible display. All the information you need is available anywhere and everywhere you need it.

The EMS100 is compatible with existing instrument panels and key switches so you don't need to remove them while upgrading to newer digital technology. For new installations, the EMS100 and a compatible NMEA 2000® display can replace the traditional analog instrument panel.


  • Tachometer
  • Engine Hours
  • Coolant Water Temperature
  • Engine Oil Pressure
  • Boost Pressure
  • Exhaust Gas Pressure
  • Charging Voltage
  • Drive Trim
  • Fuel Filter Alarm
  • Boost Alarm
  • Coolant Water Level Alarm
  • Engine Oil Pressure Alarm
  • Exhaust (Salt Water Flow) Alarm
  • Coolant Water Temperature Alarm


The EMS100 supports these engines (check back soon for additional engines)

  • Yanmar GM Series
  • Yanmar YM Series
  • Yanmar JH Series
  • Yanmar LH Series
  • Yanmar LP Series
  • Yanmar LY Series



Maretron NMEA 2000 Analog Engine Monitoring System EMS100-01 Datasheet (EMS100_Datasheet.pdf, 407 Kb) [Download]

Maretron NMEA 2000 Analog Engine Monitoring System EMS100-01 Manual (EMS100UM_1.1.pdf, 243 Kb) [Download]

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Note: You are pre ordering this item. It is anticipated to be available for shipment on 09/10/2021