How to drain most lower units

How do I drain my lower unit?

Most lower units have both a drain plug and a vent plug. Note:The top plug is named a vent plug, this is sometimes mistaken for the drain / fill plug.  NEVER FILL THE LOWER UNIT FROM THE TOP PLUG.

When draining;

  1. Keep the motor straight up and down
  2. Place a bucket under the lower unit to catch the old oil
  3. Remove the bottom drain plug (use the correct size screwdriver) and set it aside
  4. Remove the top vent plug (again, choose the proper sized screw driver to avoid stripping the slot)
  5. Allow the lower unit oil to drain completely – this may take minutes or hours depending on if the oil has water mixed in (otherwise known as marshmallow fluff)

lower unit draining