A throttle cable locking assembly for a power tool, the power tool comprising a source of power having an internal combustion engine, a machine implement engaged to the source of power, and a throttle handle connected to the internal combustion engine for regulating power supply to the machine implement, the throttle cable locking assembly comprising: a cable assembly comprising: a throttle cable extending from the internal combustion engine, an outer cable extending from the internal combustion engine and enclosing a portion of the throttle cable, and an engagement member carried by a first end portion of the outer cable; and an adjuster bolt capable of being engaged with the engagement member provided on the first end portion of the outer cable, characterized in that a locking case provided for securing one end of the adjuster bolt and a portion of the engagement member precluding any possibility of accidental disengagement or loosening of the adjuster bolt and the engagement member, the locking case comprising: a first member, configured to be engaged with each of the engagement member and the adjuster bolt and a second member being configured to be moved about a hinged joint for locking the engagement member and the adjuster bolt; an internal surface of the first member and the second member are configured to be integrated with a portion of an outer surface of the adjuster bolt and with a portion of the engagement member so that the adjuster bolt can be conveniently adjusted by rotating the locking case. a cable assembly comprising: a throttle cable extending from the internal combustion engine, an outer cable extending from the internal combustion engine and enclosing a portion of the throttle cable, and an engagement member carried by a first end portion of the outer cable; and an adjuster bolt capable of being engaged with the engagement member provided on the first end portion of the outer cable, characterized in that a locking case provided for securing one end of the adjuster bolt and a portion of the engagement member precluding any possibility of accidental disengagement or loosening of the adjuster bolt and the engagement member, the locking case comprising: a first member, configured to be engaged with each of the engagement member and the adjuster bolt and a second member being configured to be moved about a hinged joint for locking the engagement member and the adjuster bolt; an internal surface of the first member and the second member are configured to be integrated with a portion of an outer surface of the adjuster bolt and with a portion of the engagement member so that the adjuster bolt can be conveniently adjusted by rotating the locking case. a throttle cable extending from the internal combustion engine, an outer cable extending from the internal combustion engine and enclosing a portion of the throttle cable, and an engagement member carried by a first end portion of the outer cable; and an adjuster bolt capable of being engaged with the engagement member provided on the first end portion of the outer cable, characterized in that a locking case provided for securing one end of the adjuster bolt and a portion of the engagement member precluding any possibility of accidental disengagement or loosening of the adjuster bolt and the engagement member, the locking case comprising: a first member, configured to be engaged with each of the engagement member and the adjuster bolt and a second member being configured to be moved about a hinged joint for locking the engagement member and the adjuster bolt; an internal surface of the first member and the second member are configured to be integrated with a portion of an outer surface of the adjuster bolt and with a portion of the engagement member so that the adjuster bolt can be conveniently adjusted by rotating the locking case. a first member, configured to be engaged with each of the engagement member and the adjuster bolt and a second member being configured to be moved about a hinged joint for locking the engagement member and the adjuster bolt; an internal surface of the first member and the second member are configured to be integrated with a portion of an outer surface of the adjuster bolt and with a portion of the engagement member so that the adjuster bolt can be conveniently adjusted by rotating the locking case.