Yamaha F6AMH Service Manual

CAMSHAFT AND VALVES
4. Measure:
 Valve stem outside diameter
d
Out of specification  Replace.
5. Measure:
 Valve stem runout
Out of specification
 Replace.
NOTE:
When replacing the valve, always use a
new valve guide and valve stem oil seal.
CHECKING THE VALVE SPRING
1. Measure:
 Valve spring free length
a
Out of specification  Replace.
2. Measure:
 Valve spring tilt
b
Out of specification  Replace.
Valve stem outside diameter
d
:
Intake valve: 5.475 - 5.490 mm
(0.2156 - 0.2161 in)
Exhaust valve: 5.460 - 5.475 mm
(0.2150 - 0.2156 in)
Valve stem runout limit
(intake valve and exhaust valve):
0.03 mm (0.0012 in)
Valve spring free length limit
a
:
27.6 mm (1.09 in)
Valve spring tilt limit
b
:
1.0 mm (0.04 in)
5-46

Yamaha F6AMH Specifications

General

Brand	Yamaha
Model	F6AMH
Category	Outboard Motor
Language	English