INSTANCE PLUG P/N INSTANCE NO. INTERNAL RESISTANCE (PIN #1 TO PIN #4)
764915 0 Open circuit
764916 1 390K Ohm
764917 2 150K Ohm
764918 3 56K Ohm
764919 4 15K Ohm
Whether these individual Identity Plugs are still available from Evinrude and could be ordered is not well-known. These plugs could be made-up as needed by using the appropriate connector and resistor. Another possible source is from a dealer who installed several multi-engine-rigged ICON EST control systems with legacy E-TEC engines.
When Evinrude shipped an E-TEC engine from the factory with the ICON EST option already installed, those engines were always sent with the ID Plug configured for INSTANCE 0. If any engine were to be rigged by an installing dealer in a multi-engine set-up, the dealer would have removed the INSTANCE 0 plug and replaced it with the appropriate plug for a higher INSTANCE number, according to how many engines would be rigged. This suggests that a dealer who had installed a few multi-engine legacy ICON EST rigged E-TEC engines might have extra ID plugs hanging around in a drawer in the workshop. Presumably, an INSTANCE 0 plug could be modified in the field by adding the appropriate resistor between pins 1 and 4 of the connector.
[Information from former product manager for E-TEC rigging and from former E-TEC electrical engineer.]