Exmark 920 manual Check Spark Arrester if equipped, Thread Locking Adhesives, Maintenance

Maintenance

3.Drain coolant when engine is cool. Coolant may be drained from the radiator by removing the drain plug in the right rear corner. The engine block may be drained by removing the rear radiator hose and/or by opening the drain cock on the right-hand side of the engine block (see Figure 16).

Figure 16

1. Oil dipstick 2. Drain cock

4.Reinstall all drain plugs and hoses and tighten drain cock.

5.Fill radiator with a 50/50 mix of water and Dex-Cool© coolant as specified in the Check Engine Coolant Level Section, allowing some room (approximately 1/2 inch (12.7 mm)) for expansion. Add 50/50 coolant mix to overflow bottle on the left side of the engine as required to bring the level up to the indicator line on the bottle.

WARNING

Engine compartment contains open belt drives, fans, and other rotating components that can cause injury. Fingers, hands, loose clothing, or jewelry can get caught by the rotating fan and drive shaft.

•Do Not operate machine without the covers in place.

•Keep fingers, hands, and clothing clear of rotating components.

•Shut off engine, wait for moving parts to stop, engage parking brake and remove key, before performing maintenance.

6.With the cap off the radiator, tilt hood closed and put the seat down. Start the engine as stated in the Operating Instructions Section. Return the seat up and hood forward to the open position.

7.Operate engine until the engine thermostat opens and coolant is circulating through the radiator core. As air is purged from the engine block and the coolant level drops, add additional coolant to the radiator.

8.When the radiator is completely full and no additional coolant can be added, continue running and install the radiator cap. Make sure that the cap is completely seated by pressing down firmly while turning until the cap stops. Once the cap is installed, the engine may be stopped.

Check Spark Arrester (if equipped)

Service Interval: Every 50 hours

WARNING

Hot exhaust system components may ignite fuel vapors even after the engine is stopped. Hot particles exhausted during engine operation may ignite flammable materials. Fire may result in personal injury or property damage.

Do Not refuel or run engine unless spark arrester is installed.

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

2.Wait for muffler to cool.

3.If any breaks in the screen or welds are observed, replace arrester.

4.If plugging of the screen is observed, remove arrester and shake loose particles out of the arrester and clean screen with a wire brush (soak in solvent if necessary). Reinstall arrester on exhaust outlet.

Thread Locking Adhesives

Thread locking adhesives such as “Loctite 242” or “Fel-Pro, Pro-Lock Nut Type” are used on the following fasteners:

• Pump drive sheave set screws.

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