Suzuki DF200/DF225/DF250 V6 4-Stroke Outboards Service Manual, Page 282Get this manual
POWER UNIT
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 thermostatsThis system cools both the power unit and exhaust and is shown in schematic form belowIf overheating occurs, the components of the cooling system must be inspected for blockage, corrosion build-up or component damageComponent inspection Refer to page Water pumpImpeller 9-11, 10-11 Water tube 7-9 Thermostat6-96 Water pressure valve 7-26 Cylinder head6-63 Cylinder block 6-78