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INSTALLATION & OPERATION MANUAL
• If the coolant level is low, add enough specified coolant to provide protection against
freezing and corrosion. Bring the level to MAX, but do not overfill.
• If frequent additions are required, see an authorized dealer for a cooling system
inspection.
• Use only soft (demineralized) water in the coolant mixture.
• The engine has aluminum engine parts and must be protected by an ethylene-glycol-
based coolant to prevent corrosion and freezing.
• DO NOT USE alcohol or methanol coolant or mix them with the specified coolant.
• DO NOT USE a solution that contains more than 60% antifreeze or less than 35%
antifreeze, which would reduce the effectiveness of the solution.
• For mixture percentages, refer to the following table:
Ambient
Temperature
-15℃ (5℉)
-25℃ (-13℉)
-35℃ (-31℉)
-45℃ (-49℉)
• In order to drain engine coolant, use a screwdriver to loosen the drain plug ①.
• The drain plug is located under the heat exchanger unit.
U125 Series Engines
Mixture Percentage
(volume)
Antifreeze
Water
35
65
40
60
50
50
60
40
-24-
Engine coolant drain plug
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