Abstract: An air/fuel mixing apparatus, configured for use with an internal combustion engine, includes a body defining a passageway therein, a throttle lever including a cam surface, a throttle valve positioned in the passageway and responsive to movement of the throttle lever, a choke lever including a follower surface configured to be engaged by the cam surface, and a choke valve positioned in the passageway and responsive to movement of the choke lever and the throttle lever. The air/fuel mixing apparatus also includes a solenoid configured to disengage the choke lever from the throttle lever, and move the choke valve to a substantially-opened position.

Abstract: A muffler suited for use in discharging exhaust gas from an engine. The muffler generally includes a housing that defines a muffler interior, an inlet aperture, and an outlet aperture. A baffle that defines a baffle interior is positioned to divide the muffler interior into an inlet space and an intermediate space. A first aperture is defined within the baffle to provide fluid communication between the inlet space and the intermediate space and a second aperture is formed within the baffle to provide for fluid communication between the intermediate space and the baffle interior. A flow guide is integrally formed with the baffle and is positioned to direct exhaust gas from the baffle interior through the outlet aperture.

Abstract: An engine oil heater suited to use with an engine having an oil fill port in fluid communication with an oil reservoir that is adapted to contain a quantity of oil. The engine heater generally includes a coupling member operable to engage the oil fill port and a heater element interconnected with the coupling member and having a sufficient length such that the heater element is adapted to be at least partially immersed in oil. A temperature sensor is positioned to measure a temperature and a first electrical connector is configured to engage a second electrical connector. The first electrical connector is electrically connectable to the heater element to provide a flow of current and a control circuit is operable to vary the flow of current to the heater element in response to the measured temperature.

Abstract: A rewind cover guard for an internal combustion engine. The guard has a mounting surface and a flange. The mounting surface has an inner edge and an outer edge, and is disposed between the blower housing and the starter rewind cover of the engine. The flange is formed integral with the mounting surface and projects outwardly from the mounting surface near the outer edge. The flange is disposed adjacent the starter rewind cover. The flange extends in a direction transverse to the mounting surface, and is disposed vertically above the rewind cover. The flange has a deflecting surface facing away from the rewind cover, and a lip along the free edge of the flange. The guard diverts water and melted snow away from the rewind cover to help prevent moisture from entering the engine.

Abstract: A rewind cover guard for an internal combustion engine. The guard has a mounting surface and a flange. The mounting surface has an inner edge and an outer edge, and is disposed between the blower housing and the starter rewind cover of the engine. The flange is formed integral with the mounting surface and projects outwardly from the mounting surface near the outer edge. The flange is disposed adjacent the starter rewind cover. The flange extends in a direction transverse to the mounting surface, and is disposed vertically above the rewind cover. The flange has a deflecting surface facing away from the rewind cover, and a lip along the free edge of the flange. The guard diverts water and melted snow away from the rewind cover to help prevent moisture from entering the engine.

Abstract: An engine oil heater suited to use with an engine having an oil fill port in fluid communication with an oil reservoir that is adapted to contain a quantity of oil. The engine heater generally includes a coupling member operable to engage the oil fill port and a heater element interconnected with the coupling member and having a sufficient length such that the heater element is adapted to be at least partially immersed in oil. A temperature sensor is positioned to measure a temperature and a first electrical connector is configured to engage a second electrical connector. The first electrical connector is electrically connectable to the heater element to provide a flow of current and a control circuit is operable to vary the flow of current to the heater element in response to the measured temperature.