"Number on the plate is J140TXCUA" = Johnson 140 v4 Year=1987
Here is the link..
http://shop2.evinrude.com/Index.aspx..._id=0&siteid=1
TX is indcitive of a 25" leg ..Unless someone swap it around ..
BTW I can say for sure its NOT a 89 that Power PACK is for 86 & 87 models only ..I own both models Evinrude 140 v4 from the same year ...