Removing The Exhaust Cover; Checking The Pcv; Checking The Thermostat; Checking The Exhaust Cover Anode - Yamaha F150A Service Manual

Removing the exhaust cover

1. Remove the thermoswitch "1", thermo-
stat "2", and PCV "3".
1
3
2. Remove the exhaust cover "1".
1

Checking the PCV

1. Check the PCV "1". Replace if damaged
or worn.
2. Check the grommet "2". Replace if
deformed.
3. Check the spring
deformed or fatigued.
2
"3". Replace

Checking the thermostat

1. Suspend the thermostat in a container of
water.
2. Place a thermometer in the water, and
then heat the water slowly.
3. Measure the thermostat valve opening
"a" at the specified water temperatures.
Replace if out of specification.
a
if
Water
temperature
58–62 °C
(136–144 °F)
above 70 °C
(158 °F)

Checking the exhaust cover anode

1. Check the anodes. Clean if there is
grease, oil, or scales.
7-50
Exhaust cover
1
3
Valve opening "a"
Starts opening
4.3 mm (0.17 in) or above
2