Servicing A Kohler Engine - Exmark QUEST S Series Operator's Manual

Maintenance
Checking the Spark Plug
1. Inspect the spark plug
Note: If you see light brown or gray on the
insulator, the engine is operating properly. A
black coating on the insulator usually means the
air cleaner is dirty.
Important: Do Not clean the spark plug(s).
Always replace the spark plug(s) when it has:
a black coating, worn electrodes, an oily film,
or cracks.
1. Center electrode
insulator
2. Side electrode
2. Check the gap between the center and side
electrodes.
3. Set the gap to 0.030 inch (.76 mm).

Servicing a Kohler Engine

Important: Refer to the Engine Owner's Manual
for additional maintenance procedures.
Servicing the Air Cleaner-Kohler
Engine
Service Interval: Every 50 hours—Clean the
air-cleaner paper element
(more often in dusty,
dirty conditions)(Kohler
engine).
Every 100 hours—Replace
the air-cleaner paper
element (more
often in dusty, dirty
conditions)(Kohler
engine).
Note: Operating the engine with loose or damaged
air-cleaner components could allow unfiltered air into
the engine, causing premature wear and failure.
Figure 42
3. Air gap (not to scale)
Removing the Elements:
1. Park machine on level ground, disengage the blade
control switch, engage the parking brake, stop
engine, and remove key. Wait for all moving parts
to stop before leaving the operator's position.
2. Clean around the air cleaner cover to prevent dirt
from getting into the engine and causing damage.
3. Rotate the latches outward.
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1. Latch
2. Engine
4. Remove the cover to access the air-cleaner
element.
5. Separate the foam and paper elements (Figure 44).
1. Paper element
Cleaning the Foam and Paper Elements:
Foam Element:
1. Wash the foam element with water.
2. Dry the element by squeezing it in a clean cloth.
Important: Replace the foam element if it
is torn or worn.
3. Lightly oil the foam element using new engine oil
and squeeze out any excess oil.
48
Figure 43
3. Air-cleaner elements
4. Air-cleaner base
Figure 44
2. Foam element
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