Suzuki DF15 - Operation; Water Cooling System

6-44 POWER UNIT
OPERATION
WATER COOLING SYSTEM
The water cooling system consists of the water pump (in the lower unit), the water tube (between the lower
unit and the power unit) and the thermostat (in the cylinder). This system cools both the power unit and the
exhaust and is shown in schematic form below.
If overheating occurs, the components of the cooling system must be inspected for blockage, corrosion
build-up or damage.
Component inspection
Refer to page
Water pump/Impeller........................................................... 8-10
Water tube .......................................................................... 7-9
Thermostat.......................................................................... 6-43
Cylinder head...................................................................... 6-13
Cylinder block ..................................................................... 6-26
COOLING SYSTEM SCHEMATIC
When OPEN
Air vent hole
Water
Exhaust gas
Exhaust tube
THERMOSTAT
CYLINDER HEAD
CYLINDER
WATER TUBE
WATER PUMP
WATER INLET
PILOT WATER HOLE
WATER DRAIN HOSE
DRIVESHAFT HOUSING
WATER PASSAGE
IN OIL PAN
WATER PASSAGE
IN OIL PAN
PROPELLER
EXHAUST OUTLET
WATER