"Hi,I need some help here. I a
"Hi,I need some help here. I am going to replace a lower unit of my 80 horse merc. I found a good one at website which is 70HP 3 cyl, serial# 5285869 mercury. it said 79/80 product. My motor serial # is 5006372 , 4 cyl ,80HP . I think it is year 78 motor.
Is it...