Exmark Commercial 21 850 - Manual (Page 29)

Maintenance
Change Oil Filter
(EC21KA, EC21KABBC,
EC21KAX, EC21KAY,
EC21KABBCX,
EC21KABBCY, EC21KACA,
and EC21KABBCCA)
Service Interval: Every 100 hours
1. Run the engine to warm the oil.
2. Stop the engine and wait for all moving parts to
stop.
3. Disconnect the wire from the spark plug.
4. Drain the engine oil.
5. Place a rag under the oil filter to catch any oil that
may leak out as you remove the filter.
6. Remove the oil filter.
7. Use your finger to coat the gasket on the new
filter with clean engine oil (see Figure 30).
Figure 30
1. Gasket
8. Install the new filter and hand tighten it 2/3 turn
only.
9. Fill the crankcase to the Full line on the dipstick
with fresh oil.
10. Connect the wire to the spark plug.
11. Run the engine for about 3 minutes.
12. Stop the engine, wait for all moving parts to stop,
and check for oil leakage around the filter.
13. Add oil to compensate for the oil in the oil filter.
14. Recycle the used oil filter according to local codes.
Check Condition Of Belt
(Self-Propelled Units Only)
Service Interval: Every 40 hours
1. Stop engine, wait for all moving parts to stop.
2. Remove the belt cover to the lawn mower housing.
3. Check the belt for cracks, frayed edges, burn
marks or any other damage.
4. Replace the damaged belt.
Check Spark Plugs
Service Interval: Every 100 hours
1. Stop the engine and wait for all moving parts to
stop.
2. Disconnect the wire from the spark plug
(Figure 10 and Figure 11).
3. Clean around the spark plug.
4. Remove the spark plug from the cylinder head.
Note: Replace a cracked, fouled, or dirty spark
plug. Do Not clean the electrodes because grit
entering the cylinder can damage the engine.
5. Set the gap on the plug to 0.030 inch (0.76 mm)
(Figure 31).
Figure 31
1. Side electrode 3. Air gap—0.030 inch
(0.76 mm)
2. Center electrode
insulator
6. Install the spark plug and the gasket seal.
7. Torque the plug to 17 ft-lb (23 N-m).
8. Connect the wire to the spark plug.
Emptying the Fuel Tank and
Cleaning the Fuel Filter
Service Interval: Every 100 hours
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