Stand-on terrain working vehicle propulsion control system

A stand-on terrain working vehicle comprising:

• a control tower;
• a steering lever pivotally coupled to the control tower, the steering lever configured to move between a first position and a second position;
• a blocking bar pivotally coupled to the control tower, the blocking bar configured to move between a blocking position and an unblocking position;
• a locking bar pivotally coupled to the blocking bar;
• and
• a locking bracket coupled to the control tower, the locking bracket having a first engagement portion and a second engagement portion, wherein the locking bar is configured to selectively engage the locking bracket at one of the first engagement portion and the second engagement portion,
• wherein the blocking bar, when in the blocking position, obstructs full movement of the steering lever between the first position and the second position and, when in the unblocking position, does not obstruct movement of the steering lever between the first position and the second position,
• wherein the locking bar engages the locking bracket at the first engagement portion when the blocking bar is in the blocking position and the locking bar engages the locking bracket at the second engagement portion when the blocking bar is in the unblocking position.