Suzuki DF25/DF30 Four Stroke Service Manual, Page 178Get this manual
POWER UNIT 7-61
OPERATION
WATER COOLING SYSTEM
The water cooling system includes the lower unit water pump, lower unit to power unit water supply tube, oil pan water pressure valve, power unit water passages and thermostatThis system cools both the power unit and exhaust and is shown in schematic from belowIf overheating occurs, the components of the cooling system must be inspected for blockage, corrosion buidup or component damageComponent inspection Refer to page