4 cylinders + 6 cylinders 4 cylinders + 6 cylinders - Steyr Motors

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ToC 05 COOLING SYSTEM Closed cooling circuit To drain the closed cooling circuit, lift or lower the bow of the boat in such a way that the engine is in horizontal position, which permits an ideal drainage of motorblock and manifold. SERVICE MANUAL MARINE ENGINES 1 ATTENTION: Approx. 1 liter of coolant will remain in the motorblock which is to be considered for refilling. With hot engine, the closed cooling circuit is under pressure. Do not try to open the coolant tank cap or the drain plug when the engine is hot. This could lead to severe injuries by hot coolant under pressure. As soon as the engine has cooled down, the cap may be opened by 1/4 turn to the left, to release possibly remaining pressure. Then press down the cap, turn and remove. 00.07 ill.5 1 7 There are two drain plugs on the engine through which the coolant from the internal cooling circuit can be drained. (Refer to ill.5/pos.1 and ill.6/pos.1) 8 Loosen the two drain plugs (ill.5/pos.1 and 6/pos.1), possibly stick a hose onto the drain plugs and collect the coolant in a bucket. 00.07 ill.6 ATTENTION: The closed cooling circuit must always be filled with coolant. If the circuit remains for a long time without coolant, corrosion damages may occur. Page COOLING SYSTEM - 14 Z001019/0_6_July 2008
ToC SERVICE MANUAL MARINE ENGINES 05 COOLING SYSTEM 05.00.08 Fill cooling system Closed cooling system 1 Fill cooling circuit with specified coolant only. Coolant level should reach the lower edge of the filler neck in the expansion tank. 2 For 4 cyl. & 6 cyl. engines with new exhaust (screwed cap) only NOTE: Cooling system deaerate automatically while filling. For 6 cyl. engines (old version) only (item 3-4) Remove venting screw (ill.2/pos.1) (SW6) at the front of heat exchanger. Fill cooling circuit with specified coolant only. Coolant level should reach the lower edge of the filler neck in the expansion tank. 4 Mount venting screw again and tighten. 00.08 ill.1 ATTENTION: For a new filling of the closed cooling circuit, make sure that the cooling system is deaerated completely. 1 5 Let the engine run, check coolant level and refill coolant if necessary. 00.08 ill.2 Raw water circuit After engine start, filling is done automatically via raw water pump. ATTENTION: Raw water intake valve must be open. Z001019/0_6_July 2008 Page COOLING SYSTEM - 15
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STEYR MARINE ENGINES 4 CYLINDERS +
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PREFACE STEYR MOTORS GmbH has devel
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TABLE OF CONTENTS (MAIN ASSEMBLY GR
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05 Cooling system 05.01 Cooler, hea
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ToC SERVICE MANUAL MARINE ENGINES G
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SERVICE MANUAL MARINE ENGINES 03 FU
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ToC SERVICE MANUAL MARINE ENGINES I
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°C °F 250 80 40 100 120 0 L MAIN
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4 cylinders + 6 cylinders 4 cylinders + 6 cylinders - Steyr Motors

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