E-3 Manual - MGL Avionics

Infinity E-3 Operating Manual Page 28Please note that the ground connection (black wire) from the E-3 must be connected to the engine block as shown. Selecta suitable point on your engine block for this connection. The engine block itself needs to be connected to the negativesupply, in all cases this should be a direct connection to your batteries minus terminal. This should be a thick coppercable with a very low resistance and it needs to be as short as possible. This requirement is even more severe if you areusing electric start as the very considerable currents required by the starter motor will be using this connection.For this engine we recommend that you use the supplied 220 ohm ballast resistor. Select a value of 6.0 for pulses perrevolution under the “RPM SETUP” menu.Note: Some Rotax engines may require that a 220 ohm ballast resistor is fitted between the revcounter input and the ground terminal. This resistor should be fitted if you cannot obtain stableRPM throughout the range regardless of any setting of the rev counter sensitivity adjustment.