1-14
1
Manual starter
Cylinder head assembly
Item
Unit
Model
E.ST. E.ST.PT.
Cylinder
Minimum compression
pressure (*1)
kPa
(kgf/cm
2
,
psi)
870.0 (8.70, 126.2)
Engine oil
Oil pressure (*2)
at 60 °C (140 °F) with SL
10W-30 engine oil and at
950 r/min
kPa
(kgf/cm
2
,
psi)
250.0 (2.50, 36.3)
Thermostat
Valve opening temperature
°C (°F)
58.0–62.0 (136–144)
Fully open temperature
°C (°F)
70.0 (158)
Fully open stroke
mm (in)
3.0 (0.12)
(*1) Measuring conditions: Ambient temperature 20 °C (68 °F), wide open throttle, with spark plugs
removed from all cylinders.
When pulling the starter handle to crank the engine, the compression pressure may vary depending on
the speed at which the starter handle is pulled. (Manual starter model) The figures are for reference
only.
(*2) For details of the checking method, see “Checking the oil pressure” (7-1). The figures are for reference
only.
Item
Unit
Model
STD
Starter rope length
mm (in)
2100.0 (82.7)
—
Starter rope extended length
mm (in)
1700.0–1900.0
(66.9–74.8)
—
Item
Unit
Model
STD
Cylinder head
Warpage limit
mm (in)
0.10 (0.0039)
Valve stem
Diameter
Intake
mm (in)
5.475–5.490 (0.2156–0.2161)
Exhaust
mm (in)
5.460–5.475 (0.2150–0.2156)
Runout
Intake and exhaust
mm (in)
0.010 (0.0004)
Valve guide
Inside diameter
Intake and exhaust
mm (in)
5.500–5.512 (0.2165–0.2170)
Stem-to-guide clearance
Intake
mm (in)
0.010–0.037 (0.0004–0.0015)
Exhaust
mm (in)
0.025–0.052 (0.0010–0.0020)
Installation position
mm (in)
16.3–16.7 (0.64–0.66)
Summary of Contents for Kingfish 25
Page 1: ...YAMAHA MOTOR CO LTD F4A F4 Goldfish 4 Kingfish 25 SERVICE MANUAL...
Page 4: ......
Page 20: ...0 15 GEN INFO General information MEMO...
Page 45: ...1 25 SPEC Specification MEMO...
Page 65: ...2 19 TECH FEA Technical features and description MEMO...
Page 81: ...3 17 RIG GING Rigging information MEMO...
Page 215: ...7 67 POWR Power unit MEMO...
Page 229: ...LOWR Lower unit 8 11 0 A...
Page 392: ...A Appendix Wiring diagram A 1 How to use the wiring diagram A 1...
Page 394: ......
Page 395: ......