Problem to be solved: to provide an amphibious vehicle capable of suppressing the occurrence of overheat by cooling the running internal combustion engine when traveling on the ground.Solution: a vehicle body 4 having an engine space 13, a running means 6 for running on land, and a propulsion means 8 for propelling in water are provided, and the traveling means 6 is a running internal combustion engine 14 accommodated in the engine space An amphibious vehicle equipped with a radiator 20 for cooling the cooling water of the running internal combustion engine 14.In accordance with the running internal combustion engine 14, a cooling water injection means 72 is provided on the upstream side of the radiator 20, and the cooling water injection means 72 is operated on the basis of the running internal combustion engine 14 or its ambient temperature, and injects cooling water upstream of the radiator 20.The operation of the cooling water injection means 72 may be operated manually or manually based on the temperature detected by the temperature detecting sensors 82 and 84.Diagram
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