Yanmar 4LHA-HTP Operation Manual page 29

(1) Handling of Cooling Water
1) Choose LLC which will not have any adverse effects on the materials (cast iron, aluminum,
copper, etc.) of the engine's fresh water cooling system.
2) Strictly use the proper mixing ratio of LLC to fresh water as instructed by the LLC maker.
3) Replace the cooling water periodically according to the maintenance schedule given in this
operation manual.
4) Remove the scale from the cooling water system periodically according to the instructions this
operation manual.
5) Strictly use the proper mixing ratio of LLC to fresh water as instructed by the LLC maker. If
incorrect ratio of LLC to fresh water is used, the cooling performance of the cooling water
will drop and the engine may become overheated.
6) Do not mix different types (brand) of LLC, chemical reactions may make the LLC useless and
engine trouble could result.
piNOTICE]
Excessive use of LLC also lowers the cooling efficiency of the engine.
Be sure to use the mixing ratios specified by the LLC maker for your temperature
range.
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