Offshoreonly.com - Changing Drive Oil in TRS

If you can do it while the drive is warm it will go a bit faster. I pull the bottom plug with a drain plug under it. Keep the drive trimmed a little up so that oil in the back of the drive will run forward. Then take out the dipstick inside the transom resovoir. You can also take out the top vent plug to help drain quicker. Once it is totally drained out then put your pump on the bottom of the drive and start to fill it up till you see fluid come out the vent hole. When that happens put the vent plug back in and keep filling it up till the resovior is full. You can not just put fluid in the resovior because you will get air bubbles and never get the drive full. God luck.

Jon