Oster M98111-000-000 Service Manual page 3

In order to replace the motor you need to verify your blender base. If you have a blender base
type S (M9811 I), You need to used either the old motor bracket that is in your previous motor
or use the # 56 (027878-000-000) to install the new motor.
Type "S" - (M98111-000-000)
(M98111-001-000)
Current Base - 101793-001-000
101793-002-000