Exmark NAV20KC User Manual download pdf (Page 21)

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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.

4.2 PRE-START

4.2.1 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.

4.2.2 Make sure you understand the controls, their locations, their functions, and their

safety requirements.

4.2.3 Refer to Maintenance, Section 5, and perform all the necessary inspection and

maintenance steps.

4.3 OPERATING INSTRUCTIONS

4.3.1 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.

4.3.2 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.

4.3.3 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.

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