Abstract: A fan shroud for an internal combustion engine includes a snap-on detachable overflow bottle. The fan shroud has a fan opening and a unitary bottle mount with a deflectable bottle clip with a latch end that engages a groove in the overflow bottle. The mount includes an opposite side with an inwardly directed locking surface that engages a recess in a side face of the overflow bottle. The overflow bottle is held upright and secured to the fan shroud by snapping it into the bottle mount.

Abstract: A fan shroud for an internal combustion engine includes a snap-on detachable overflow bottle. The fan shroud has a fan opening and a unitary bottle mount with a deflectable bottle clip with a latch end that engages a groove the overflow bottle. The mount includes an opposite side with an inwardly directed locking surface that engages a recess in a side face of the overflow bottle. The overflow bottle is held upright and secured to the fan shroud by snapping it into the bottle mount.

Abstract: A housing includes a removable cover having a top side and downwardly extending side walls covers a fixed cradle containing an internal combustion engine. The side walls define a plurality of outwardly opening recessed grooves extending from a bottom edge to a plurality of catches. A plurality of stretchable straps are disposed in the recessed grooves with fixed ends attached to the engine cradle and opposite free ends defining tabs that engage the catches to bias the cover to the engine cradle. The cover also defines an air baffle at the top side having a venturi nozzle defined by a convex circumferential surface having a narrowing diameter from top to bottom so that air drawn into engine through the nozzle is essentially non-turbulent. At one end, the cover houses an air filter and has a downwardly extending hold-down to limit movement of the air filter.

Abstract: An air filtration system for an internal combustion engine is provided wherein the air filter has an exit orifice for sealingly engaging the air intake duct of a carburetor via a friction-fit. The friction-fit provides an integrated seal between the orifice and duct such that additional sealing means are not required. The friction-fit can be provided by a plurality of ridges formed along the interior surface of the orifice or by decreasing the cross-sectional area of the orifice in the direction of the internal cavity formed by the filter walls. Decreasing the cross-sectional area of the orifice is accomplished by providing a plurality of stepped diameters of a bottom surface material or a surface that conically slopes inward towards the cavity. In addition, the air filter can be secured to a platform of an engine by a holding arm having a hook shaped distal end with a catch that can be disengaged by pulling at a grip, thus allowing easy access to the filter for inspection, cleaning, and replacement.

Abstract: A coolant overflow bottle is interposed between the centrifugal fan and the radiator for guiding air expelled by the fan toward the radiator. The bottle includes a top, a bottom, a pair of nested curved sidewalls, and a rear wall. The side walls are joined at a leading edge, and join the top and bottom. The rear wall is joined to the side walls at a trailing edge, and joins the top and bottom. The bottle wails define an exterior shape for guiding air.

Abstract: An internal combustion engine includes a mechanism for releasing compression from the cylinder during starting. That mechanism has an actuator attached to the engine camshaft for sliding between first and second positions. In first position the actuator is engaged by a lifter to open the engine exhaust valve during the compression phase of the combustion cycle. At the second position, the valve lifter does not engage the actuator and the exhaust valve remains closed during the compression phase. A weight lever is pivotally attached to the camshaft and drives the actuator between the first and second positions in response to engine speed. At slow speeds occurring while before the engine starts, the actuator is held the first position so that the compression is relieved. After the engine starts, centrifugal force causes the weight lever to drive the actuator into the second position at which normal compression occurs.

Abstract: A breather device for an internal combustion engine is disclosed which has a simplified construction yet assists in engine cooling. Cooling baffle elements are formed in a one-piece construction and extend outwardly from the device to direct cooling air over engine fins. The breather device does not take up valuable space around the engine as it is accommodated in the vee. Because of its simplified construction, it is easily connected to the engine and removed therefrom for maintenance purposes.