POWR
Power unit
5-27
60C5D11
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:
• Use the valve guide clearance calculation
method or the valve runout measurement
method to check the valve guides.
• Before checking the valve guide make sure
that the valve stem diameter is within spec-
ification.
1.
Measure the valve guide inside diameter
a
.
2.
Calculate the valve stem-to-valve guide
clearance as follows. Replace the valve
guide if out of specification.
Valve margin thickness
a
:
Intake:
0.8–1.2 mm (0.031–0.047 in)
Exhaust:
1.0–1.4 mm (0.039–0.055 in)
Valve stem diameter
b
:
Intake:
5.97–5.99 mm
(0.2350–0.2358 in)
Exhaust:
5.96–5.97 mm
(0.2347–0.2350 in)
Valve stem runout:
Intake: 0.01 mm (0.0004 in)
Exhaust: 0.01 mm (0.0004 in)
Valve guide inside diameter limit
a
:
6.01–6.02 mm (0.2367–0.2370 in)
Valve stem-to-valve guide clearance
= valve guide inside diameter – valve
stem diameter:
Intake:
0.02–0.05 mm
(0.0008–0.0019 in)
Exhaust:
0.04–0.06 mm
(0.0016–0.0023 in)
S60C5450
Summary of Contents for F100B
Page 1: ...SERVICE MANUAL 60C 28197 5D 11 290429 F100B F100C ...
Page 52: ...SPEC Specifications 2 17 60C5D11 MEMO ...
Page 162: ...LOWR Lower unit 6 15 60C5D11 Drive shaft and lower case F100B 6 ...
Page 190: ...LOWR Lower unit 6 43 60C5D11 Drive shaft and lower case F100C 6 ...
Page 200: ...LOWR Lower unit 6 53 60C5D11 Shimming F100C 6 ...
Page 209: ...60C5D11 7 2 1 2 3 4 5 6 7 8 9 MEMO Special service tools ...
Page 210: ...BRKT Bracket unit 7 3 60C5D11 Tiller handle 7 ...
Page 212: ...BRKT Bracket unit 7 5 60C5D11 ...
Page 214: ...BRKT Bracket unit 7 7 60C5D11 ...
Page 244: ...BRKT Bracket unit 7 37 60C5D11 Gear pump F100B 7 ...
Page 341: ......
Page 343: ......
Page 344: ...YAMAHA MOTOR CO LTD Printed in the Netherlands Jun 2001 0 5 1 CR F100BET F100CET E ...