Exmark QUEST 406 Operator's Manual page 45

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Installing the Filters
Important: To prevent engine damage, always
operate the engine with both air filters and the
cover installed.
1.
If installing new filters, check each filter for
shipping damage.
Note: Do not use a damaged filter.
2.
If you are replacing the safety filter, carefully slide
it into the filter body (see Figure 39).
3.
Carefully slide the primary filter over the safety
filter.
Note: Ensure that the primary filter is fully
seated by pushing on its outer rim while installing
it.
Important: Do not press on the soft inside
area of the filter.
4.
Install the air cleaner cover with the side indicated
as up facing upward and secure the latches.
Checking the Engine Oil
Service Interval: Before each use or daily
Important: Do not overfill the crankcase with oil
and run the engine; engine damage may result.
1.
Park the machine on a level surface, disengage
the blade control switch, stop the engine, engage
parking brake, and remove the key.
2.
Make sure the engine is stopped, level, and is cool
so the oil has had time to drain into the sump.
3.
To keep dirt, grass clippings, etc., out of
the engine, clean the area around the oil fill
cap/dipstick before removing it.
4.
Check the engine oil level.
5.
If the level is low, wipe off the area around the oil
fill cap, remove cap/dipstick and add oil to the
"FULL" mark on the dipstick. Exmark 4-Cycle
Premium Engine Oil is recommended; refer to
the following information for an appropriate API
rating and viscosity. Always check the level with
45
Maintenance
Figure 40
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