Yamaha F15B, Руководство по обслуживанию

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POWR
5-25 6D45F11
Power unit
6. Remove the intake valve and exhaust
valves.
NOTE:
When replacing the valve, also replace the
valve guide and stem seal.
Checking the valve springs
1. Measure the valve spring free length
a
.
Replace if out of specification.
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.
Valve spring free length
a
:
34.40 mm (1.3543 in)
6D450550
a
6
5
6D450540
Valve spring compressor
5
:
90890-04019
Valve spring compressor
attachment
6
:
90890-06320
Valve spring tilt limit
b
:
1.5 mm (0.06 in)
b
6D450560
Valve margin thickness
a
:
Intake:
0.50–0.90 mm (0.0197–0.0354 in)
Exhaust:
0.50–0.90 mm (0.0197–0.0354 in)
a
6D450570
6D45F11-05 03.10.9 20:44 Page 28