Water-cooled engine

摘要

A water pump is provided on one lower side of a crankcase and connected to a water jacket on the rear surface of the cylinder block through a water hose. The outlet section of the water jacket is connected to the thermostat case near this connecting section. The thermostat valve is a bottom bypass type thermostat valve, directly attached to the rear surface of the cylinder head. The bypass hose is connected to the water pump and passes along the side of a starter motor and passes between the starter motor and a speed sensor. The arrangement of the bypass hose in a bottom bypass type thermostat valve effectively utilizes space.