Evinrude Ficht EMM Computer  778611 75 90 100 115 135 150 175 200 225 250 hp ECU

tested functions as it should, sold as-is, sorry no returns on electronics.These EMM units are not plug and play, they must be programed to your engine specs. You can not remove one and replace it with another without programing it. You must have the software program with the use of a laptop to program the EMM. This EMM will work on most OMC engines once it is programed to your engine specs. Please find an OMC dealer with the software to program your engine.