Abstract: An engine starting device includes a self-starting motor drivable to rotate the crankshaft of an engines, and a one-way clutch operable to permit transmission of rotary motion of the self-starting motor in one direction only to the crankshaft. The one-way clutch includes an inner race operatively connected to an output shaft of the self-starting motor, an outer race operatively connected to the crankshaft, a plurality of ratchet pawls pivotally connected to the inner race and urged by springs against the inner race. The one-way clutch is designed such that, when the speed of rotation of the inner race while being rotated by the self-starting motor goes up to a predetermined value, the ratchet pawls are caused to swing in a radial outward direction under the action of centrifugal force against the bias of the springs and become engaged by the outer race to thereby engage the one-way clutch.

Abstract: A starting device for an electric starter motor is described which is capable of downsizing a small-sized motor per se without increasing torque of the small-sized motor by deceleration by gears, is capable of being fabricated in a small size as a whole and inexpensively, and is capable of setting a reduction gear having desired dimensions without significantly changing sizes in a radial direction and in an axial direction of total of a starter case. The starting device for an electric starter motor includes a ring gear driven by two or more small-sized motors and a clutch mechanism installed between the ring gear and an engine for starting the engine by rotating the ring gear. Featured in the starting device for an electric starter motor is a reduction gear which is interposed between the small-sized motors and the ring gear. The reduction gear is arranged on an outer side of the ring gear.

Abstract: An engine starting apparatus has a first one-way clutch provided at one part of a series of gears for transmitting rotation of a starter motor to a crankshaft, and a second one-way clutch provided in a transmission mechanism for transmitting rotation of a recoil starter to the crankshaft. The first one-way clutch includes a small gear, a decelerating gear and a large gear. The small gear is connected to the crankshaft and has step portions on an inner peripheral surface thereof. The decelerating gear is connected to an output shaft of the starter motor. The large gear is connected in meshing engagement with the decelerating gear and has ratchets urged to mesh with the step portions of the small gear to engage the first one-way clutch only when the large gear is rotated via the decelerating gear upon rotation of the starter motor in such a direction as to start an engine.

Abstract: An engine starting apparatus comprises a case having an outer case and a case cover defining an interior space. The outer case has at least first, second and third bolt apertures, for attaching the case to an engine. A motor mounting seat is formed in an inner wall of the outer case for mounting thereon a starter motor for starting the engine. A recoil starter mechanism is disposed in the interior space of the case for starting the engine. The recoil starter mechanism has a starting rope pulling port disposed adjacent to the first bolt aperture. The starter motor is disposed between the first bolt aperture and the third bolt aperture when the starting rope pulling port is positioned between the first bolt aperture and the second bolt aperture, and the starter motor is disposed between the first bolt aperture and the second bolt aperture when the starting rope pulling port is positioned between the first bolt aperture and the third bolt aperture. First louvers extend from an outer surface of the case cover.

Abstract: A throttle lever device for an engine having a decreased number of parts and capable of facilitating an assembling operation. An operation grip for controlling an engine of a mowing machine or the like is provided on opposite sides thereof with a throttle lever and a lock lever engageable with the throttle lever, respectively. A lock button is arranged in proximity to the lock lever so as to hold the throttle lever at a half throttling position. The throttle lever, lock lever and lock button are arranged so as to be pushable in toward a center of the operation grip. The lock lever and lock button are formed integrally with each other and constantly urged by an elastic member so as to be projected outwardly of the operation grip.

Abstract: There is provided a recoil starter for starting an internal combustion engine which has a simple and compact structure with a reduced number of parts and which can be manufactured at a reduced cost.

Abstract: A recoil starter is provided which prevents malfunction, such as disengagement of a claw, after the engine is started repeatedly even if the starter is not made of a material of high intensity. A spring can be wound substantially precisely circularly. It is quite easy to mount a friction plate to the starter. Furthermore, this subassembly does not loosen after long-term usage. A rope guide can be easily mounted to the starter case, thus reducing the fabrication cost. The recoil starter can be placed and locked in position relative to a fan cover with high accuracy. When the ratchet is in its protruded position, the pivotal point of the ratchet is located radially inside a pulley around the position where the pulley engages the ratchet. A ratchet support portion is formed radially outside the pulley on the reel. The ratchet forms a beam supported at its both ends. The beam acts against a force exerted by the pulley due to a resistance produced when the engine is started.

Abstract: A recoil starter casing is made from a plate. The plate has a polygonal top face and a plurality of rectangular side faces integral with and extending from respective edges of the top face. Each of the side faces includes a recess in its edge, and a pair of projections at opposite ends of the recess. A plurality of air inlets are formed in the side faces. The side faces are bent from the top face along the respective edges of the top face. A fan cover has slots. The projections are inserted into the corresponding slots. The free ends of the projections are then bent so as to secure the starter casing to the fan cover. The inside of the starter casing is cooled through the air inlets and the recesses or air vents.