These 2D-55E are around 2008 models . I installed 2 new MDI, boxes on the moters. These lasted 27 hours for one and 30 plus for the other. Then I replaced them with new ones numbers 23195776 W1749. I got around 270 hours on these ones, They also failed. I am on a Catana 471 catamaran that has 2 moters. Need some help I am in Mexico have spoken to Volvo Penta dealer and can not get no help from them.