Maintenance Instructions
CLEANING
46
Engine Air Cooling System
To prevent engine overheating and possible engine
damage, clean grass clippings, chaff and dirt from
the rotating engine air intake screen
every 8 hours
of operation. In certain mowing conditions (dry
grass, leaves, tree “cotton”, etc.) it may be neces-
sary to check and clean this area several times each
day to prevent engine overheating. Also, visually
check inside cylinder head shroud and between cyl-
inder head fins for material packed in this area which
would prevent cooling airflow; remove shroud and
clean as required.
Rotating Engine Cooling
Air Intake Screen
Keep Rotating Engine Cooling
Air Intake Screen Clean
CAUTION
Operating the engine with a blocked air in-
take screen, dirty or plugged cooling fins,
and/or cooling shrouds removed will cause
engine damage from overheating.
Clean these areas
of dirt and debris
Clean Cooling Fins and Fan
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.
Check Airflow
with Hand
Cooling System Airflow
IMPORTANT:
Yearly, it is good maintenance prac-
tice to remove the engine cooling shroud and clean
the cylinder head cooling fins 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.
Summary of Contents for B18
Page 73: ...69 Operator s Notes...
Page 74: ...70 Operator s Notes...
