A snowmobile with an intercooler includes a four-stroke-cycle engine unit disposed in an engine room covered by an engine hood, and the engine unit includes an engine body, a turbocharger, an intercooler for cooling an intake-air, which is pressurized and heated up by the turbocharger, and an electric motor-driven cooling fan provided for the intercooler for introducing an outside air to the intercooler through which the air after cooling the intercooler is discharged toward the inside of the engine room.

 
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> Awakening degree determining system

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