Air cleaner with crankcase breather assembly

A crankcase breather of the type having an air filter container portion with a tube connector conduit extending outward from an arcuate shaped outboard wall of the container portion and which is adapted to be secured in and against the upright wall of the outer housing shell of an air cleaner with the tube connector conduit project out through the upright wall of the outer housing shell, the improvement wherein said crankcase breather includes a raised boss retainer portion extending outward from said outboard wall and encircling said tube connector conduit, a U-shaped groove in the lower portion of said raised boss retainer portion and, wherein said upright wall of outer housing shell has an aperture therein of a configuration conforming to the base of said U-shaped groove and the adjacent upper portion of said raised boss retainer portion whereby said groove can receive a portion of the material of said upright wall defining said aperture and the remainder of said raised boss retainer portion can be snapped into locking engagement with the remaining edge portions of said upright wall defining said aperture.