I bought Evinrude diagnostics 4.4 CD p/n 764642 - IIRC it's good for DI and ETEC motors - from l and m marine online, $290 plus shipping. You'll also need the cable to hook the computer up to the motor. I had a bad experience with a $60 1.42b I purchased from a Canadian guy on ebay - didn't work for me at all.