Maintenance Instructions
CLEANING
53
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 con-
ditions (dry grass, leaves, tree “cotton”, etc.), it may
be nec essary to check and clean this area several
times each day to prevent engine overheating.
CAUTION
Operating the engine with a blocked air
intake screen, dirty or plugged cooling
fins, and/or cooling shrouds removed will
cause engine damage from overheating.
Rotating Engine
Cooling Air
Intake Screen
Keep Rotating Engine Cooling
Air Intake Screen Clean
Cylinder Head Cooling Fins
It is essential for performance and longevity of the
air-cooled engine to keep the cylinder head cooling
fins 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 airflow. If there is little or no airflow, clean
the cooling fins as follows:
DANGER
Make sure to keep hands clear of exhaust
pipe, muffler, and moving parts when
checking airflow.
NOTE:
The planned maintenance schedule calls
for cleaning the cylinder head cooling fins
yearly or
every 300 hours
as a minimum.
Check for Airflow
Cooling System Airflow
1. Inspect accessible cooling fins and clean with
compressed air as needed. If the buildup is ex-
cessive, refer to step 2.
2. Remove the spark plug wire. Remove the cyl-
inder head shroud by removing the one (1) bolt,
as shown in the
Inspect and Clean Cylinder
Head Cooling Fins
photo. Cover the spark
plug boot before cleaning out the cooling fins.
Clean the cooling fins by blowing with com
-
pressed air. If the buildup is excessive, use a
piece of wire to probe into the fins for cleaning.
3. Reinstall the shrouds by reversing the preced-
ing steps. Start the engine and confirm the
cooling airflow.
Cylinder Head Shroud
Bolt (Not Visible)
Spark Plug
Wire
Cooling
Fins
Inspect and Clean Cylinder Head Cooling Fins
(Viewed from Left Side of Tractor)
Summary of Contents for MS
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