Original OEM factory motor for the model R-4375C, R-2800C, R-1650C and R-1650A power nozzle. If you experience a burning smell or see a blue arc from the side of the main housing, this may be the item causing the issue.
If you have a metal sole plate that you remove with two screws, then this is the correct part.
This item includes the R3550 motor shaft sleeve to help with belt performance and torque.