You currently have the QSB5.9 425hp marine engine right? I need a set of injectors identical to the ones that come in your engine, but all of the Cummins dealers need a serial number for that type of motor. Would you mind sending me your motors serial number to see if the Cummins shop can find the injector part number? You can email it to me at rajinkajin9119@hotmail.com or if it allows you to pm me.
Thanks,
Scott