This part fits your Edger
Lock washer 3/8" I.D.
Genuine OEM Part - Manufacturer #736-0169
This part fits your Edger
Lock washer 5/16, split
Genuine OEM Part - Manufacturer #936-0119
This part fits your Edger
Lock washer 1/4" I.D.
Genuine OEM Part - Manufacturer #936-0329