Exmark Commercial 21 4500-686 Rev. B - Manual (Page 27)

Maintenance
damaged or excessively
dirty.)
Note: Do Not operate the engine without the air
cleaner assembly; extreme engine damage will occur.
1. Stop the engine and wait for all moving parts to
stop.
2. Disconnect the wire from the spark plug
(Figure 10).
3. Press down on the latch tabs on top of the air
cleaner cover.
Figure 28
1. Cover 4. Paper filter
2. Foam element 5. Air cleaner housing
3. Screen grid
4. Open the cover
5. Remove screen grid and paper filter assembly.
6. If the air filter is damaged or is wet with oil or
fuel, replace it.
7. If the air filter is dirty, tap it on a hard surface
several times or blow compressed air less than
30 psi (207 kPa) through the side of the filter
that faces the engine. If the paper element is
excessively dirty, replace it.
Note: Do Not brush the dirt off the filter;
brushing forces dirt into the fibers.
8. Remove the foam element and wash it with a mild
detergent and water, then blot it dry.
9. Saturate the element with clean engine oil, then
squeeze it (Do Not twist) to remove the excess oil.
10. Install the foam element.
11. Remove dirt from the air cleaner housing and
cover using a moist rag. Do Not wipe dirt into
the air duct.
12. Install the filter.
13. Close the cover.
Service Air Filter
(ECXHNBBC21 and
ECXHN21 Units)
Service Interval: Every 25 hours—Clean
the cover, base, foam
and paper elements
(ECXHNBBC21 and
ECXHN21 Units).
Every 250 hours— Replace
the air filter elements
(ECXHNBBC21 and
ECXHN21 Units). (May
need more often if they are
damaged or excessively
dirty.)
Note: Do Not operate the engine without the air
cleaner assembly; extreme engine damage will occur.
1. Stop the engine and wait for all moving parts to
stop.
2. Disconnect the wire from the spark plug
(Figure 10).
3. Remove the two wing nuts that secure the cover
(Figure 29).
27