Danger – Exmark NAV20KC User Manual
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3.3 OPERATING INSTRUCTIONS
3.3.1
Open fuel shut-off valve:
The fuel shut-off valve is located on the right side of unit in fuel line next to the fuel
filter. Raise the hopper to access.
3.3.2 Starting
Engine:
Brake must be engaged, speed control lever in neutral position and PTO 
lever “OFF” to start engine. (It is not necessary for the operator to be in the 
seat to start the engine.) 
On a cold engine, place the throttle midway between the “SLOW” and “FAST” 
positions and push choke lever forward into the “ON” position. Turn ignition switch 
to the “start” position. Release the switch as soon as the engine starts. 
IMPORTANT: DO NOT crank the engine continuously for more then ten (10)
seconds at a time. If the engine does not start, allow a 60 second cool-
down period between starting attempts. Failure to follow these guidelines 
can burn out the starter motor. 
After starting a cold engine, gradually return choke to the “OFF” position as the
engine warms up.
On a warm engine, place the throttle midway between the “SLOW” and “FAST”
positions and leave the choke in the “OFF” position.
3.3.3 Engaging
PTO:
DANGER
POTENTIAL HAZARD 
♦ The rotating blades under the mower 
deck are dangerous.
WHAT CAN HAPPEN 
♦ Blade contact can cause serious injury or 
kill you.
HOW TO AVOID THE HAZARD
♦
DO NOT put hands or feet under the
mower or mower deck when the blades 
are engaged.
DANGER
POTENTIAL HAZARD 
♦ An uncovered discharge opening will 
allow objects to be thrown in an 
operator’s or bystander’s direction. Also, 
contact with the blade could occur. 
WHAT CAN HAPPEN 
♦ Thrown objects or blade contact can 
cause serious injury or death.
HOW TO AVOID THE HAZARD
♦
Always operate the mower with the grass
catcher down and with the grass catcher 
door securely closed.
