got my first I/O latley 89 2.3L OMC. Cleaned it up, changed all the oils, engine, stern drive(sorta). This is where the BIG opps comes in. Didn't know it was any different than an out board. Drained the leg through the lower hole, then filled through the same hole till oil came out the upper hole (in the leg) took it for a ride. Didn't make it far. took out the top gear set. Got a new set with bearing and seal. going to change them out. Is there any other damage that I should look for. Will I have to take the lower section apart also.