168
POWERHEAD
COOLING SYSTEM DIAGRAM
COOLING SYSTEM DIAGRAM
The water cooling system includes the lower unit water pump, lower unit to powerhead water supply
tube, oil pan water pressure valve, powerhead water passages, and thermostat.
The cooling system cools both the powerhead and exhaust. If overheating occurs, inspect the cooling
system for blockage, corrosion, or damage.
005765
OIL PAN
OIL PAN
PILOT WATER HOLE
WATER TUBE
WATER PUMP
CYLINDER
BLOCK
THERMOSTAT
CYLINDER BLOCK
When open
STBD
CYLINDER HEAD
PORT
CYLINDER HEAD
WATER
PRESSURE VALVE
WATER INTAKE
DRIVE SHAFT
HOUSING
PROPELLER
EXHAUST OUTLET
WATER