Exmark 850 manual Check for Loose Hardware, Service Air Cleaner, Change Engine Oil

Maintenance

speed control lever in the neutral 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 speed control lever in the neutral position - starter must not crank.

Try to start with operator in seat, parking brake engaged, PTO engaged and speed control lever in the neutral position - starter must not crank.

Try to start with operator in seat, parking brake engaged, PTO disengaged, and the speed control lever forward (out of neutral), starter must not crank.

2.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 initiate shutdown after approximately 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 offof seat (but do not get off of machine) engine must initiate shutdown 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.

Check for Loose Hardware

Service Interval: Before each use or daily

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

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

Service Air Cleaner

Service Interval: Every 50 hours—Service the air cleaner. (May need more often under severe conditions. See the Engine Owner’s

Manual for additional information.)

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

2.Tilt hopper up to gain access to the air cleaner.

3.Loosen retaining clips and remove air cleaner compartment cover.

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

5.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.

6.Do Not wash or use pressurized air to clean paper element or inner element.

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

Change Engine Oil

Service Interval: After the first 5 hours

Every 100 hours (May need more often under severe conditions.)

1.Stop engine, wait for all moving parts to stop, and remove key. Engage parking brake.

2.Drain oil while engine is warm from operation.

3.Tilt hopper up to gain access to the engine area.

4.The oil drain valve is located on right hand side of engine at the back of the unit. Remove two nuts near right hand drive tire and swing out the fuel tank. Install oil drain hose, supplied in the literature pack, onto oil drain valve. Place pan under machine to catch oil. Open valve to allow oil to drain and then close valve

5.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 1/2 to 3/4 turn.

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