How do you remove the lower unit on a 1989 Johnson 90 hp?

To remove the lower unit on a 1989 Johnson 90 hp outboard motor, first ensure the engine is in the neutral position and disconnect the battery. Remove the screws securing the lower unit, typically located around the gear case and at the front where it meets the powerhead. Next, disconnect the shift rod by removing the retaining clip and sliding it out. Finally, gently pull the lower unit down and away from the powerhead, being careful not to damage any attached components.