Omc is a good set got one on my boat as long as the boot is good shape no cracking.As long as the trim is concearned the out drive doesn"t have a trim it does but not for trimmming the boat with. The outdrive and the motor connect by a knuckle when you raise the outdrive it looses contact thats why you have one on the front of the motor it trims the motor therefore trimming the outdrive. always run the outdrive down when in gear