
Part # 8478Dimensions:-3" o.d.-1/2" width-.669" boreFits Murray 25", 30" & 36"Replaces Murray 420613 and 91178Rear Engine Rider Models: 7-35500, 7-30502 & 7-25501. Composite: Glass Filled Nylon.All Idler Pulleys that have .669" bore can be reduced to 3/8" or 1/2"