Chapter 5 TPD1317e Б Г В А а а а а Cylinder jacket cooler Pipework to suit 32mm (1.25”) ID В А Cooler for intercooler system hose Pipework to suit 45mm (1.75”) ID А Intercooler circuit inlet for 32mm (1.25”) diameter hose. Б Intercooler circuit outlet for 32mm (1.25”) diameter hose. В Engine circuit inlet for 45mm (1.75”) diameter hose. Г Engine circuit outlet for 45mm (1.75”) diameter hose. hose Figure 2 - Connections for keel coolers (M185C, M215C, M225Ti) 5.4 Keel Cooling System: M135 and M130C Engine Both engine models may be purchased in a form suitable for keel cooling, using a cooler for the engine circuit. Figure 3 shows the connections provided for the cooler. Note:
Under extreme conditions the water flow in the system may increase to 180 l/min (40 gallons/min). Pipework should have a clear bore of 38mm (1.5”) The pipework between the engine and the cooler should be as short and direct as is possible but should be sufficiently flexible to allow the engine to move on it’s flexible mountings. The layout should discourage the formation of air locks, and venting points should be provided wherever an air lock is likely to occur. The keel cooling system should normally be filled with a water/antifreeze mixture containing 50% antifreeze.
This mixture is necessary even in warm climates, as the anti freeze contains corrosion inhibitors which protect the engine cooling system. Page 28 M135 M130C Engine Circuit Heat rejection 123kW (7000Btu/min) 123kW (7000Btu/min) Design value for the water temperature at the exit from the keel cooler 60oC (140oF) 60oC (140oF) Design value for the water flow through the cooler. Pipework to suit 45mm (1.75”) bore hose connections 77 l/min (17galls/min) 77 l/min (17galls/min)