Exmark NAV20KC - Manual (Page 21)

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3.1.6 Throttle Control: Located on right hand console.
Throttle is used to control engine speed. Moving throttle lever forward will increase
engine speed and moving throttle lever to the rear will decrease engine speed.
3.1.7 Brake Lever: Located on left side of unit, between the seat and console. The
brake lever engages a parking brake on the drive wheels.
Pull the lever up and rearward to engage the brake.
Push the lever forward and down to disengage the brake.
The unit must be tied down and brake engaged when transporting.
3.1.8 Ignition Switch: Located on the right hand console.
The ignition switch is used to start and stop the engine. The switch has three
positions “OFF”, “ON” and “START”. Insert key into switch and rotate clockwise
to the “ON” position. Rotate clockwise to the next position to engage the starter
(key must be held against spring pressure in this position).
Brake must be engaged, speed control lever in neutral and PTO lever
“OFF” to start engine. (It is not necessary for the operator to be in the seat to
start the engine.)
3.1.9 Hour Meter: Located on the right hand console. The hour meter is connected to
a pressure switch installed in the engine block and it records the number of
hours that the engine has run. If the ignition switch is left on without engine
running, hour meter will not run.
NOTE: This switch is not a low oil sensor and will not alert the operator if the
engine oil is low.
3.1.10 Engine Oil Temperature Light and Buzzer: Located on the right console. The
engine oil temperature light monitors the temperature of the engine oil. An
illuminated engine oil temperature light and intermittent buzzing sound signals
the engine is overheating.
3.1.11 Fuel Shut-Off Valve: Located in fuel line by fuel tank and fuel filter (accessible by
raising the hopper). The fuel shut-off valve is used to shut off the fuel when the
machine will not be used for a few days, during transport to and from the job site,
and when parked inside a building.
3.1.12 Drive Wheel Release Valves: Located on the top left front corner of hydrostatic
pumps. Drive wheel release valves are used to release the hydrostatic drive
system to allow the machine to be pushed without the engine running. Tilt seat
up to gain access to pumps.
With a 7/16 wrench, turn both valves one turn counter-clockwise to release drive
system. Turn clockwise to reset system. DO NOT overtighten. DO NOT tow
machine.
3.2 PRE-START
3.2.1 Fill fuel tank. For best results use only clean, fresh regular grade unleaded
gasoline with an octane rating of 87 or higher. Regular grade leaded gasoline
may also be used; however, combustion chamber and cylinder head will require
more frequent service. See Engine Owner's Manual.
DO NOT add oil to gasoline.
DO NOT overfill fuel tank. Never fill the fuel tank so that the fuel level rises
above a level that is 1/2” below the bottom of the filler neck to allow for fuel
expansion and prevent fuel spillage.
3.2.2 Make sure you understand the controls, their locations, their functions, and their
safety requirements.
3.2.3 Refer to Maintenance, Section 4, and perform all the necessary inspection and
maintenance steps.