Re: power trim unit swap
the trim unit was a direct bolt in, the 83 evinrude hasa 2 wire motor and the 79 has a 3 wire. the trim motors are also a direct swap so i used the 3 wire motor again instead of rewiring the trim circuit.
it was easier to swap the trim unit by removing engine from boat and while hanging on a chain remove the tilt tube, tilt piston pin and then the take complete unit to the bench and remove transom brackets.
the trim cap seals are very easy to replace if you can get the caps out of the housing using the special tool. my 1979 trim caps were frozen solid.
reinstall in reverse order with most bolts hand tight until its all assembled.
good luck.
