How Do You Remove A Lower Unit Mercruiser?
The proper way to remove the lower unit on a MerCruiser stern drive is completed in two steps. First, you remove the sterndrive and then you separate the lower unit from the upper gear box. It is possible to drop the lower unit while the stern drive is still attached to the boat, but replacing it is very difficult. In addition, removing the stern drive allows for inspection of the u-joints and other important components. Remove the Sterndrive Step 1 Lower the sterndrive completely and drain the gear oil by removing the lower fill plug and the upper vent screw. They are found on the starboard side of the drive unit. Check the lubricant for excess metal filings or water. Metal filings or water are signs of trouble in the lower unit. If these are found, you may want to have the drive inspected by a professional mechanic. Step 2 Disconnect the trim cylinders by removing the 9/16 inch nuts on the cylinder anchor pins. These are the pins that attach the cylinder to the lower unit. Use cautio
