TPD1317e Chapter 5 5.2 Keel Cooling Statement: M300Ti and M265Ti Engines - keel cooling is not offered with these models. 5.3 Keel Cooling System: M225Ti, M215C and M185C Engines All engine models may be purchased in a form suitable for keel cooling, using two separate coolers, one for the cylinder jacket circuit and one for the intercooler circuit. Figure 2 shows the connections provided for the coolers. The requirements for each section are as follows: Note: Under extreme conditions the water flow in the jacket circuit may increase to 40 gallons/min.
Pipework should have a clear bore of 38mm (1.5”) The pipework between the engine and coolers 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 27 M215C/M225Ti M185C Cylinder Jacket Circuit Heat rejection.
132kW (7500 Btu/min) 123kW (7000 Btu/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) 66 l/min (14.5galls/min) Intercooler Circuit (Includes gearbox oil cooler) Heat rejection 25kW (1400 Btu/min) 19kW (1100 Btu/min) Design value for the water temperature at the exit from the cooler. 38oC (100oF) 38oC (100oF) Design value for the water flow through the cooler. Pipework to suit 32mm (1.25”) bore hose connections. 123 l/min (27galls/min) 109 l/min (24 galls/min)