corrected at 20°C (68°F). If changes about
0.0007 for every 1°C (1.8°F). If the specific
gravity for electrolyte does not reach the
desirable value, charge the battery soon.
In hot weather
Oil
Engine oil should be changed to summer type
oil (Refer to RECOMMENDED LUBRICANTS)
Coolant
Because the engine is more likely to overheat
in hot weather, the engine should be placed
in the shade. Overheating sometimes comes
from defective hoses, connections, loosened
radiator cap, or defective fan belt. So check
carefully the cooling system to maintain the
best cooling effect.
It is recommended to add antifreeze solution
into the cooling system because it increases
the coolant boiling point.
Battery
Since the battery electrolyte evaporates much
in hot weather, it is necessary to top up dis-
tilled water frequently.
WHEN USING THE ENGINE ONLY
DURING A PARTICULAR PERIOD
OF THE YEAR
When the engine is to be used only in a par-
ticular period of the year, such as summer or
winter, the service life of the engine will be
determined by how it is maintained during
the out-of-use period. Follow the procedures
below when preparing the engine.
During in-use period
Follow the normal handling procedures dur-
ing this period. However, it will be necessary
to shorten the oil replacement internal and
other service intervals, because the engine
will often be operated for a longer than nor-
mal period of time during a single day and
the load applied will often be greater than
usual.
During out-of-use period
During the out-of-use period, perform the fol-
lowing maintenance procedures for the
engine. If it is impossible to perform these
operations, refer to “Long Term Storage”.
1. Perform loaded operation once a month.
Run the engine and perform checks set forth
in item 1 above.
Apply a load in excess of 50% of the rated
load to the engine, and operate it for more
than 10 minutes. Make sure that no abnormal
noise or vibration is produced.
2. Perform the following inspection and
adjustment before placing the engine in
use period.
Drain sediment from the fuel system (fuel
filter and fuel tank).
Change engine oil and oil filter element.
Check and adjust valve clearance.
Check and adjust fan belt tension.
Check battery electrolyte level and
specific gravity.
Change air cleaner element.
Check cooling water
Check exhaust leakage
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