Abstract: An engine assembly includes a crankcase, shaft, blower housing, and cooling fan. The shaft is rotatably coupled to the crankcase and defines a rotational axis. The blower housing includes an internal space. The cooling fan is disposed within the internal space, includes a plate defining an upper surface, and is positioned to rotate with the shaft about the rotational axis. The cooling fan includes a band having an inner band radius and an outer band radius. The cooling fan includes a plurality of reversed fins extending between the band and the upper surface and between a root adjacent to the rotational axis and a tip adjacent to the outer band radius, each fin offset at an angle measured in a counterclockwise direction from a plane passing through the rotational axis and the tip to a plane passing through the root and the tip when viewed from above the cooling fan.

Abstract: An engine assembly includes a crankcase, shaft, blower housing, and cooling fan. The shaft is rotatably coupled to the crankcase and defines a rotational axis. The blower housing includes an internal space. The cooling fan is disposed within the internal space, includes a plate defining an upper surface, and is positioned to rotate with the shaft about the rotational axis. The cooling fan includes a band having an inner band radius and an outer band radius. The cooling fan includes a plurality of reversed fins extending between the band and the upper surface and between a root adjacent to the rotational axis and a tip adjacent to the outer band radius, each fin offset at an angle measured in a counterclockwise direction from a plane passing through the rotational axis and the tip to a plane passing through the root and the tip when viewed from above the cooling fan.

Abstract: An exemplary embodiment of the invention relates to an air cleaner assembly for a small multi-purpose, combustion engine as may be used for mechanically powering pressure washers, lawn mowers, go-carts, electric power generators, and the like. In some embodiments, the air cleaner assembly includes a casing having an air inlet and an air outlet, and the casing is designed to pivot open to allow a user to access the casing interior. In the casing interior, a filter support is designed to hold an air filter between the air inlet and air outlet. In certain embodiments, the air cleaner assembly also includes a hinge that is integrally formed with the casing. A releasable fastener is designed to hold the casing closed.