Abstract: A lawn mower includes a blade housing and a height adjusting mechanism for adjusting a height of the blade housing with respect to the associated ground. The height adjusting mechanism includes rear wheel support members for supporting rear drive wheels. Each rear drive wheel includes a cover having an exterior cover part and an interior cover part. The interior cover part is directly connected to one of the support members without the use of separate associated mechanical fasteners.

Abstract: According to some embodiments of the disclosed subject matter, a ride-on mower can include a main frame, a side member pivotally connected to the main frame, and a transaxle. The transaxle can include a pump portion that has a pump housing fixed on the main frame and a fluid displacement structure located in the pump housing. The transaxle can further include a motor portion including a motor housing and a fluid driven structure located in the motor housing. The motor housing can be separate from the pump housing, and the motor housing can be carried on and movable with the side member. Tubing can interconnect the pump portion and the motor portion.

Abstract: A lawn mower includes a blade housing and a height adjusting mechanism for adjusting a height of the blade housing with respect to the associated ground. The height adjusting mechanism includes rear wheel support members for supporting rear drive wheels. Each rear drive wheel includes a cover having an exterior cover part and an interior cover part. The interior cover part is directly connected to one of the support members without the use of separate associated mechanical fasteners.

Abstract: Fastening method, assembly and structure of engine oil fill extension tube can include an oil fill extension tube and a self-locking washer. The oil fill extension tube can include a plurality of locking edges disposed towards a first distal end of the oil fill extension tube, where the plurality of locking edges can define boundaries of a plurality of slots. The self-locking washer can include a plurality of teeth disposed on its top surface. The self-locking washer can be oriented over an opening in the oil pan, after which the oil fill extension tube can be threaded into the opening. The plurality of slots and plurality of teeth can be ratcheted together to fasten the oil fill extension tube into the oil pan when the oil fill extension tube is rotated clockwise. The washer can further include a locking extension to securely engage a portion of the oil pan.

Abstract: Fastening method, assembly and structure of engine oil fill extension tube can include an oil fill extension tube and a self-locking washer. The oil fill extension tube can include a plurality of locking edges disposed towards a first distal end of the oil fill extension tube, where the plurality of locking edges can define boundaries of a plurality of slots. The self-locking washer can include a plurality of teeth disposed on its top surface. The self-locking washer can be oriented over an opening in the oil pan, after which the oil fill extension tube can be threaded into the opening. The plurality of slots and plurality of teeth can be ratcheted together to fasten the oil fill extension tube into the oil pan when the oil fill extension tube is rotated clockwise. The washer can further include a locking extension to securely engage a portion of the oil pan.

Abstract: Systems and methods for draining fuel from a carburetor of a combustion engine can include a first control valve in communication between a fuel source and a fuel chamber of a carburetor and a second control valve in communication between the fuel chamber of the carburetor and a drain reservoir. The first and second control valves can be coupled and operable such that, upon disengagement of the engine, the first control valve can be closed to block a supply of fuel to the fuel chamber, and the second control valve can be opened to connect the drain reservoir to the fuel chamber, which can operate to draw liquid fuel from the fuel chamber into the drain reservoir. The fuel can then be moved from the drain reservoir into a fuel storage tank, where it can be stored until needed by the carburetor.

Abstract: Systems and methods for draining fuel from a carburetor of a combustion engine can include a first control valve in communication between a fuel source and a fuel chamber of a carburetor and a second control valve in communication between the fuel chamber of the carburetor and a drain reservoir. The first and second control valves can be coupled and operable such that, upon disengagement of the engine, the first control valve can be closed to block a supply of fuel to the fuel chamber, and the second control valve can be opened to connect the drain reservoir to the fuel chamber, which can operate to draw liquid fuel from the fuel chamber into the drain reservoir. The fuel can then be moved from the drain reservoir into a fuel storage tank, where it can be stored until needed by the carburetor.