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REMOVING AIR BUBBLES IN COOLANT
• Start the engine and warm it up at a low rpm.
• Stop the engine and allow the engine to cool,
and then open the cap of the expansion tank
carefully.
*NOTE: Never open the cap when the engine is
hot. It may cause scalding.
• Refill with coolant if needed.
• Reinstall the expansion tank cap
• Check the level of the expansion tank regularly.
CABIN HEATER CONNECTION
• In order to use a cabin heater, an extra coolant
circulation pump is needed.
• After connecting cabin heater lines, engine
coolant must be refilled and checked.
• Please check coolant flow direction, as shown in
the drawing.
• Outer diameter of connection port is Ø 17.3 mm
INSTALLATION & OPERATION MANUAL
U125 Series Engines
NEVER OPEN THE EXPANSION TANK CAP WHEN THE ENGINE IS
OPERATING OR HOT. IT COULD RESULT IN SERIOUS PERSONAL
INJURY AND MAY CAUSE ENGINE DAMAGE.
* Outer diameter of line is Ø 19.1 mm
WARNING
- 25 -
To heater
From heater
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