Re: Gear oil in 1970 johnson 9.5
without thinking after I removed the water pump and impeller, I inverted the lower unit to see if the screen was clogged. Only a little bit drained out, but I decided to let the rest drain into a bucket and replace it with new oil. I would estimate only about 1/2 cup of oil came out. I've never attempted outboard repair, so mostly what I do is by trial and error. Right now, mostly error!
Mike