Exmark NAV27KC, NAV20KC manual Service Interval 100 hrs

b)Check the 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 stop after approx. 1/2 second has elapsed (seat has time delay kill switch to prevent cut-outs on rough terrain).

Run engine at one-third throttle, engage PTO and raise off of seat (but do not get off of machine) engine must stop after 1/2 second has elapsed.

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.

5.1.5Check for loose hardware.

Service Interval: Daily

a)Stop engine, wait for all moving parts to stop, and remove key.

b)Visually inspect machine for any loose hardware or any other possible problem. Tighten hardware or correct the problem before operating.

5.1.6Service air cleaner.

Service Interval: 50 hrs.

More often under severe conditions.

See Engine manual for additional information.

a)Stop engine, wait for all moving parts to stop, and remove key.

b)Tilt hopper up to gain access to the air cleaner.

c)Loosen retaining clips and remove air cleaner compartment cover.

d)Remove paper element. Check the condition of the paper element. Replace if dirty, bent or damaged.

e)Check the condition of the inner element. Replace whenever it appears dirty, typically every other time the paper element is replaced. Clean the base around the inner element before removing, so dirt does not get into the engine.

f)DO NOT wash or use pressurized air to clean paper element or inner element.

g)Reinstall elements. Position the cover so that the rubber dust ejector is pointing downward and secure with retaining clips.

5.1.7Change engine oil:

Service Interval: 100 hrs.

NOTE: Change oil and filter after first five (5) hrs. of operation.

a)Stop engine, wait for all moving parts to stop, and remove key.

b)Tilt hopper up to gain access to the engine area.

b)Drain oil while engine is warm from operation.

c)The oil drain valve is located on left hand side of engine at the back of the unit.

Place pan under machine to catch oil and open valve. Allow oil to drain, then close valve.

d)Replace the oil filter every other oil change. Clean around oil filter and unscrew filter to remove. Before reinstalling new filter, apply a thin coating of oil on the surface of the rubber seal. Turn filter clockwise until rubber seal contacts the filter adapter then tighten filter an additional 2/3 to 3/4 turn.

e)Clean around oil fill cap and remove cap. Fill to specified capacity and replace cap. Use oil recommended in engine owner’s manual. DO NOT overfill.

f)Lower hopper.

g)Start the engine and check for leaks.

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