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Maintenance Instructions CLEANING
63
Engine Cooling System
Cooling Air Intake System
To prevent engine overheating and possible engine
damage, clean grass clippings, chaff, and dirt from
the rotating engine cooling air intake screen after
every 8 hours of operation. In certain mowing
conditions (dry grass, leaves, tree “cotton”, etc.), it
may be nec essary to check and clean the screen
several times each day to prevent engine overheat-
ing. Also, visually check inside cylinder head shroud
and between cylinder head ns for material packed
in this area which would prevent cooling airow; re-
move shroud and clean as required.
CAUTION
Operating the engine with a blocked air
intake screen, dirty or plugged cooling
ns, and/or cooling shrouds removed will
cause engine damage from overheating.
Cylinder Head Cooling Fins
It is essential for performance and longevity of the
air-cooled engine to keep the cylinder head cooling
ns clean and free of obstruction. After every 8
hours of operation, check the performance of the
cooling system by starting the engine, holding a
hand adjacent to the cylinder head, and feeling the
cooling airow. If there is little or no airow, clean
the cooling ns as described below.
DANGER
Make sure to keep hands clear of exhaust
pipe, mufer, and moving parts when
checking airow.
Every 100 hours, inspect and clean the cooling ns
(more often when operating in extremely dusty, dirty
conditions). Remove the two (2) cooling n access
panels in the engine shroud and clean the cooling
ns and external surfaces using compressed air.
Make sure to reinstall the access panels before op-
erating the engine.
NOTE: If dirt is packed into the cooling ns it may
be necessary to remove the engine shroud in order
to thoroughly clean the cooling ns.
Kohler Engine
Shroud
Engine Cooling
Fin Access Panels
Rotating Cooling
Air Intake Screen
Keep Rotating Cooling Air Intake
Screen and Cooling Fins Clean
IMPORTANT: Yearly, it is good maintenance prac-
tice to remove the engine cooling shroud and clean
the cylinder head cooling ns thoroughly to prevent
overheating and extend engine life. Make sure cool-
ing shroud is reinstalled properly. This procedure
will require removing the engine from the chassis.