Cooling System - Yamaha F150B Service Manual

Cooling system

The fresh cooling water is taken into the front of the trim tab and supplied to the exhaust passage of
the lower case to cool the exhaust gas.
Cooling water also flows around the muffler to cool the upper case and reduce exhaust noise.
PCV
Upper case (muffler)
Lower case
Propeller boss
A
Cooling water flow
Thermostat
Cylinder block
Cylinder head
Cylinder block
Exhaust cover
Exhaust guide
Oil pan
Water pump
Trim tab
Water inlet
Water
Lubrication system / Cooling system Cooling system
Fuel cooler
Cooling water pilot hole
0
1
2
3
4
5
6
7
A
8
9
10
A
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