Reel mower cutting bar

A mower comprising:

• a frame;
• a blade assembly supported by the frame for rotation about a first axis between an engaged position and a disengaged position;
• a reel supported by the frame for rotation about a second axis, the reel defining an outer diameter relative to the second axis and engaging the blade assembly at a contact location in the engaged position, the outer diameter defining a tangent at the contact location,
• wherein a force in a direction substantially parallel to the tangent is operable to produce a first torque in a first direction about the first axis when the blade assembly is in the engaged position, and
• wherein the weight of the blade assembly is operable to produce a second torque in a second direction about the first axis when the blade assembly is in the engaged position;
• a first mechanism coupled to one of the frame or the blade assembly;
• and
• a second mechanism coupled to the other of the frame or the blade assembly,
• wherein the first mechanism is releasably coupled to the second mechanism in the engaged position, and
• wherein the first mechanism includes a protrusion and the second mechanism includes a detent configured to releasably receive the protrusion in the engaged position.