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Operation
The Safety Interlock System
CAUTION
If safety interlock switches are disconnected
or damaged the machine could operate
unexpectedly causing personal injury.
• Do Not tamper with the interlock
switches.
• Check the operation of the interlock
switches daily and replace any damaged
switches before operating the machine.
Understanding the Safety Interlock
System
The safety interlock system is designed to prevent the
engine from starting unless:
• The blades are disengaged.
• The motion control levers are in the neutral
position.
• The parking brake is engaged.
The safety interlock system is designed to initiate
engine shutdown when:
• The parking brake is disengaged and the operator
gets off machine.
• The PTO is engaged and the operator gets off
machine.
• The parking brake is disengaged and levers are in
and the operator gets off machine.
• The parking brake is engaged and motion control
levers are in.
Testing the Safety Interlock System
Test the safety interlock system before you use the
machine each time
1. Check starting circuit. Starter should crank with
parking brake engaged, PTO disengaged and
motion control levers moved out in the neutral
lock position. The operator does not need to be
in the seat to start the engine.
Try to start with operator in seat, parking brake
disengaged, PTO disengaged and motion control
levers in the neutral lock position - starter must
not crank.
Try to start with operator in seat, parking brake
engaged, PTO engaged and motion control
levers in the neutral lock position - starter must
not crank.
Try to start with operator in seat, parking brake
engaged, PTO disengaged, and the left motion
control lever in, starter must not crank, repeat
again with the right lever in, then with both
levers in - starter must not crank.
2. Check kill circuits. Run engine at one-third
throttle, disengage parking brake and raise off
of seat (but do not get off of machine) engine
must initiate shutdown.
Run engine at one-third throttle, engage PTO
and raise off of seat (but do not get off of
machine) engine must initiate shutdown.
Run engine at one-third throttle, with brake
disengaged, move levers in and raise off seat (but
do not get off of machine) engine must initiate
shutdown.
Again, run engine at one-third throttle, brake
engaged, and move left motion control lever in
- engine must initiate shutdown.
Repeat again moving the right lever in, then
moving both levers in - engine must initiate
shutdown whether operator is on seat or not.
Note: If machine does not pass any of these tests,
Do Not operate. Contact your authorized EXMARK
SERVICE DEALER.
Important: It is essential that operator safety
mechanisms be connected and in proper
operating condition prior to use for mowing.
Driving Forward or Backward
The throttle control regulates the engine speed as
measured in rpm (revolutions per minute). Place
the throttle control in the Fast position for best
performance. Always operate in the Fast (full throttle)
position.
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