Yamaha F150 [114/313] Checking the valve guides

Yamaha F150 [114/313] Checking the valve guides
POWR
Power unit
5-29
63P3F11
2. Measure the valve spring tilt
b
. Replace
if out of specification.
Checking the valves
1. Check the valve face for pitting or wear.
Replace if necessary.
2. Measure the valve margin thickness
a
.
Replace if out of specification.
3. Measure the valve stem diameter
b
.
Replace if out of specification.
4. Measure the valve stem runout. Replace
if out of specification.
Checking the valve guides
NOTE:
Before checking the valve guide make sure
that the valve stem diameter is within specifi-
cation.
1. Measure the valve guide inside diameter
a
.
Valve spring tilt limit
b
:
1.5 mm (0.06 in)
Valve margin thickness
a
:
Intake: 0.70 mm (0.0276 in)
Exhaust: 1.00 mm (0.0394 in)
Valve stem diameter
b
:
Intake:
5.4775.492 mm
(0.21560.2162 in)
Exhaust:
5.4645.479 mm
(0.21510.2157 in)
Valve stem runout:
0.01 mm (0.0004 in)
Valve guide inside diameter
a
:
5.5045.522 mm
(0.21670.2174 in)
S69J5770
a

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