Abstract: Disclosed herein is a lawn mower comprising a blade housing, wheels for supporting the blade housing for movement along the ground, a rotary cutting blade supported in the blade housing, and an internal combustion engine carried by the blade housing and rotatably driving the rotary cutting blade. The engine includes a carburetor and a movable throttle control for controlling fluid flow through the carburetor, the throttle control being movable from an open position to a flow restricting position. The engine further includes a movable air vane connected to the throttle control for moving the throttle control, a fan for impelleing air against the air vane so as to urge the throttle control to the flow restricting position, and a spring connected to the throttle control for urging the throttle control toward the open position.

Abstract: Disclosed herein is a starter mechanism for an engine having a starter gear, which starter mechanism includes a rotatable starter shaft, a starter pinion rotatably mounted on the starter shaft for axial movement, in response to rotation of the starter shaft in one direction, to an engine starting position in driving engagement with the engine starter gear, and a drive member mounted for rotation coaxially with the starter shaft and drivingly connected to the starter shaft. Manual starting of the engine is selectively effected by rotating a circular member or rotor drivingly connected to the drive member through a first one-way clutch which, in response to rotation of the rotor in the one direction, affords common rotary movement of the rotor and the drive member and permits free wheeling of the drive member relative to the rotor in the same direction when the rotor is not operated.