SV-EMS-220/221 Installation and Configuration
7-58 SkyView System Installation Guide - Revision AA
The SV-EMS-220/221 supports differential fuel flow transducer installations in Rotax 912 and
914 installations as illustrated in Figure 73.
General Placement Recommendations for Fuel Flow Transducer
Do not install the fuel flow transducer, hoses and fittings near exhaust system or
turbocharger. Excessive heat can damage fuel system components.
Do not install 90 degree fittings (elbows) on the input or output of the fuel flow transducer.
Doing so will cause turbulence in the fuel flow which causes inaccurate fuel flow data.
Install the fuel flow transducer with the three wires pointed UP.
Install a fuel filter UPSTREAM of the fuel flow transducer to screen out debris.
For best measuring performance, the fuel should travel uphill by one to two inches (25-50
mm) after leaving the fuel flow transducer.
Placement of the fuel flow transducer relative to other items in the fuel system like fuel
pumps is left to the builder. It is common to place the sensor downstream of any auxiliary
electric boost pumps but upstream of the engine driven fuel pump.
When sealing the fittings on the fuel flow transducer, do not use Teflon tape!
Instead, use a sealant such as “United EZ-Turn Fuel Resistant Lubricant” or
“Permatex Thread Sealant”.
EI FT-60 “Red Cube” Installation
The Electronics International FT-60 “Red Cube” fuel flow transducer has ¼” female NPT ports.
Do not exceed a torque of 300 inch-lbs. (.112 Nm) when installing fittings into the transducer.
The FT-60 should NOT be installed with its wires pointing DOWN (the best situation is with the
wires pointing UP). The fuel line on the outlet port should not drop down after exiting the
transducer - this configuration can trap bubbles in the transducer, causing jumpy readings. The
inlet port, outlet port, and flow direction are marked on the top of the FT-60.
Rotax Placement Recommendations
If installing on a Rotax 912, review Figure 73 for recommendations specific to these engines.
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