Mercury 20 EFI FourStroke

Water Flow Diagram
a - Water inlet
b - Water pump
c - Water tube
d - Cylinder block
e - Thermostat
f - Cylinder head
g - Fuel cooler (part of the vapor separator tank)
h - Water pump indicator outlet
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a
b
c
d
e
f
h
g
Cooling System
Page 4D-4 © 2018 Mercury Marine 90-8M0125265 eng NOVEMBER 2017