Exmark Lazer HP Operator's Manual page 26

By moving both levers an equal amount forward or back from the neutral position
the machine can be caused to move forward or backward in a straight line.
Movement of the left lever forward will cause the left drive wheel to rotate in a
forward direction. Movement of the right lever forward will cause the right
drive wheel to rotate in a forward direction. To stop forward travel, pull the
levers back to the neutral position.
To turn left while moving forward, move the left lever back toward neutral to
slow the left drive wheel.
To turn right while moving forward, move the right lever back toward neutral to
slow the right drive wheel.
To make a zero turn to the left, pull the left lever back beyond neutral while
holding the right lever slightly ahead of neutral.
To make a zero turn to the right, pull the right lever back beyond neutral while
holding the left lever slightly ahead of neutral.
Pulling the levers back from the neutral position will cause the respective drive
wheels to rotate in a reverse direction (spring tension can be felt when moving
into reverse from neutral).
To turn to the left while backing, move the left lever forward toward neutral. To
turn to the right while backing, move the right lever forward toward neutral.
POTENTIAL HAZARD
♦ Machine can spin very rapidly by positioning one lever
too much ahead of the other.
WHAT CAN HAPPEN
♦ Operator may lose control of the machine, which may
cause damage to the machine or injury.
HOW TO AVOID THE HAZARD
♦ Use caution when making turns.
♦ Slow the machine down before making sharp turns.
4.1.3 Tracking Adjustment Knob: Located under the seat on the RH pump control
link. Rotating this knob allows fine tuning adjustments so that the machine
tracks straight with the drive levers in the full forward position.
Stop machine and wait for all moving parts to stop. Engage park brake. Unhook
seat latch and tilt seat forward to gain access to the tracking knob. Rotate the knob
clockwise (as viewed from the rear of the machine) to cause the machine to track
more to the right and counterclockwise to cause the machine to track more to the
left. Adjust in quarter-turn increments until the machine tracks straight. Check that
the machine does not creep when in neutral with the park brakes disengaged.
IMPORTANT: Do not rotate the knob too far, as this may cause the
machine to creep in neutral. Refer to section 5.2.13 for control linkage
adjustment.
4.1.4 PTO Engagement Switch: Located on right fuel tank.
Switch must be pulled out to the "ROTATE" position to engage the blades.
Switch is pushed in to the "STOP" position to stop the blades.
4.1.5 Choke Control: Located on right fuel tank.
Choke is used to aid in starting a cold engine. Moving the choke lever forward will
put the choke in the "ON" position and moving the choke lever to the rear will put
the choke in the "OFF" position. DO NOT run a warm engine with choke in the "ON"
position.
CAUTION
- 21 -