Yamaha F4B - Blowby Hose, Oil Return Hose, and Cooling Water Hose

6-2
Hose routing
0
1
2
3
4
5
6
7
8
9
10
A
Blowby hose, oil return hose, and cooling water hose
a Blowby hose (cylinder block to intake
silencer)
b Oil return hose (intake silencer to crank-
case)
c Cooling water hose (thermostat cover to
crankcase)
a Intake silencer
a
b
c
a