| 摘要 |
Apparatus for cooling outboard motors, comprising a closed circuit for circulating a liquid such as fresh water through the portions of an outboard motor to be cooled. The circuit includes a thermostatically controlled mixing valve and a heat exchanger. The mixing valve is disposed between the cooling lines of the outboard motor and the heat exchanger, and is connected to an outlet line from the outboard motor, the inlet of the heat exchanger, and an inlet line running from the outlet of the heat exchanger to a cooling line of the outboard motor. A temperature responsive device is connected to the outlet line from the motor and is operatively connected to a circulating pump in the inlet line to the motor, and also to a circulating pump which is connected to the heat exchanger so as to circulate cooling fluid, such as sea water, therethrough. When the temperature of the cooling water leaving the outboard motor is below a predetermined value, the mixing valve directs the water from the outlet line from the motor to the inlet line for the motor, without diverting any cooling water to the heat exchanger. When, however, the cooling water leaving the motor exceeds the predetermined temperature, the mixing valve is moved to the appropriate position depending on the temperature to divert a part of the fresh water to the heat exchanger and part of the fresh water to the motor, or all of the fresh water from the outlet line to the heat exchanger for the purpose of cooling the fresh water before it is circulated back to the inlet line for the motor.
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