Abstract: An underwater lake weed cutting apparatus which is adapted to be driven by an electric auger motor from the rear portion of a boat. The weed cutting apparatus includes an elongated drive shaft extending through an elongated tubular housing, wherein the drive shaft is driven by the motor to consequently reciprocate a sickle bar at a lower end thereof. A geared driving mechanism converts rotary motion of the drive shaft to a reciprocating motion of a sickle bar to reciprocate a first elongated toothed cutting blade with respect to an identical second toothed cutting blade to generate a scissors action. The scissors action of the sickle bar severs lake weeds as the apparatus is swept through the water proximate the lake bottom by a boat. The cutting apparatus can be adjusted to various depths of water to facilitate cutting lake weeds proximate the root structure near the lake bottom.