I have had numerous inquiries into injector reference material to determine injector size, capacity rating, impedence, and the ability to cross numbers. Here I have provided the Delphi numbers most likely to be used in MerCruiser, Indmar and Volvo marine engines. http://www.mefituning.com/fuel-injector-reference

All MEFI 3 and MEFI 4 ECU's will support either HI or LOW impedance injectors. However, the factory default setting is for HIGH. A program or flash change to the ECU will be required to support LOW impedance injectors. If you should need a specific injector PM me for part number. Secondly, the injector drivers on any MEFI ECU will support up to 10 injectors though I have been successful at driving a max number of 12 injectors


Delphi Injector Reference
Part # lbs/hr cc/min grm/min PSI BAR Impedance
17113738 50 525.5 378 43.5 3 HIGH
17113739 40 420.4 302.4 43.5 3 HIGH
17113741 55 578.1 415.8 43.5 3 LOW
17113742 75 788.3 567 43.5 3 LOW
17113743 85 893.4 642.6 43.5 3 LOW
17113744 96 1009 725.7 43.5 3 LOW
17113812 30 315.3 226.8 43.5 3 HIGH
17113813 42 441.4 317.5 43.5 3 HIGH
17113814 65 683.2 491.4 43.5 3 LOW
17113841 55 578.1 415.8 43.5 3 LOW