Installation Guide Owner manual
EMS Configuration
5-4 EMS-D10 Installation Guide
If you need to adjust the tachometer time on the EMS-D10 to match that of your engine, press
DOWN▼ to select the item, SET TACH TIME. Press SEL► to enter the tachometer time
setting submenu. Press SEL► to select the desired digit and then DOWN▼ or UP▲ to change
the value. When you are finished, press BACK.
Engine Type Configuration
Within the GLOBAL menu, press DOWN▼ until you have selected ENGINE TYPE. Press
SEL► to toggle between LY/CON, ROTAX, and OTHER.
ENGINE TYPE: LY/CON
Setting ENGINE TYPE to LY/CON enables a percent power display for normally aspirated/non-
turbocharged Lycoming or Continental engines. Press DOWN▼ to select HP RATING and use
the INC+ and DEC- buttons to set the value to the actual horsepower rating for your engine.
Given the horsepower rating, an OAT, fuel flow, and altitude (from a connected EFIS-based
product or GPS), the EMS-D10 will calculate percent power and lean-of-peak/rich-of-peak
status, displaying both next to the Manifold Pressure gauge.
For percent power status to be calculated as accurately as possible, TACHOMETER
(RPM) HI RED/YEL should be set to the RPM value specified by the Engine
Manufacturer. (This is commonly referred to as “Redline”).
If you do not have a fuel flow sender, the EMS-D10 will still display a percent power reading
based on rich-of-peak calculations only. During lean-of-peak operation, percent power is
displayed but is incorrect. While you are in LEAN mode, percent power is not displayed.
ENGINE TYPE: ROTAX
Setting ENGINE TYPE: to ROTAX pre-configures some settings for a Rotax 912 engine. Rotax
914 engines must be manually configured using ENGINE TYPE: OTHER. A percent power
reading will not be displayed, but the EMS-D10 will automatically configure and dynamically
change the oil temperature and tachometer scales and alert thresholds in accordance with Rotax’s
recommended ranges, described in detail below.
RPM / TACHOMETER for Rotax 912:
When OIL TEMP < 120ºF, the TACHOMETER displays these ranges:
0-1400 and 4000-6000 RPM in RED
1400-1800 and 2500-4000 RPM in YELLOW
1800-2500 RPM in GREEN
When OIL TEMP > 120ºF, the TACHOMETER displays different ranges:
0-1400 and 5800-6000 RPM in RED
1400-1800 and 5500-5800 RPM in YELLOW
1800-5500 RPM in GREEN