| 摘要 |
Energy is stored in the horse power spring to surely start the engine. The stopper having the engaging engageable with the end behind the rotation direction of the cam plate depressed area is arranged at near the cam plate which is integrally formed with pulley fixed to the engine crank shaft and has the depressed area o the disk rim, and the urging means supporting the stopper in a movable manner to the engaging position where the engaging engages with the depressed area and toe the avoidance position for avoiding the rim of cam plate, and normally urging to move the stopper to the avoidance position, on the other hand, enabling the stopper to move to the engaging position from the outside, and urging not to move the stopper to the avoidance position until a sufficient rotation load is added to the cam plate at the engaging position is provided.
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