ID: 1-15/16"
OD: 2-1/8"

691606 Genuine Briggs & Stratton Seal O Ring
Fits models 135202, 135207, 135212, 135217, 135232, 135237, 135252, 135292, 135297, 327431 and other models
Replaces Old Briggs 65978, 555122, 691606