Which year powerheads are interchangeable with model number 140883C. was very surprised when I looked up the model number on the powerhead of my 1989 sportcraft with a seadrive to find out the powerhead was a 1978 evinrude 140hp. A friend a work has a 140hp, late 70's, but I'm not sure of the year, I"ll have to check, but I'd thought I'd ask here which years would fit. I thought I read that 78 was the year they changed so a 77 or earlier wouldn't fit.