Yamaha F150B, Service Manual

Page: 439 / 458

10-16
General Periodic Maintenance
0
1
2
3
4
5
6
7
8
9
10
A
5. Install the spark plugs, tighten
temporarily, and then tighten to the
specified torque using a spark plug
wrench.
Checking the timing belt
1. Check the timing belt. See “Checking the
timing belt and sprocket” (7-29).
Replacing the timing belt
1. Replace the timing belt. See “Replacing
the timing belt” (7-18).
Checking the thermostat
1. Remove the flywheel magnet cover.
2. Remove the cover
a
, gasket
b
, and
thermostat
c
.
TIP:
Do not reuse the gasket
b
, always replace
them with a new one.
3. Suspend the thermostat in a container of
water.
4. Place a thermometer in the water and
slowly heat the water.
5. Measure the thermostat valve opening
a
at the specified water temperatures.
Replace the thermostat if out of
specification.
6. Install the thermostat and cover, and then
tighten the cover bolts to the specified
torques in 2 stages.
Adjusting the throttle link and
throttle cable
1. Remove the intake silencer.
2. Loosen the locknut
a
, remove the clip
b
, and then disconnect the throttle cable
joint
c
at fully closed position.
Spark plug:
25 N·m (2.5 kgf·m, 18.4 ft·lb)
a
c
b
Water temperature Valve lift
a
58.0–62.0 °C
(136.4–143.6 °F)
0.05 mm (0.0020 in)
(valve begins to lift)
Above
70 °C (158 °F)
More than
4.3 mm (0.17 in)
Thermostat cover bolt:
1st: 6 N·m (0.6 kgf·m, 4.4 ft·lb)
2nd: 12 N·m (1.2 kgf·m, 8.9 ft·lb)
a