Yamaha F225F, Service Manual

Page: 42 / 576

1-19
SPEC
Specification
(*1) Measuring conditions: Ambient temperature 20 °C (68 °F), with spark plugs removed from all
cylinders. The figures are for reference only.
(*2) For the checking method, see “Checking the oil pressure” (7-1). The figures are for reference
only.
Cylinder head assembly
Thermostat
Valve opening temperature °C (°F) 50.0–54.0 (122.0–129.0)
Fully open temperature °C (°F) 62.0 (144.0)
Fully open stroke mm (in) 4.3 (0.17)
Replacement engine oil quan-
tity (at periodic maintenance)
Without oil filter replacement
L (US qt,
Imp qt)
6.0 (6.34, 5.28)
With oil filter replacement
L (US qt,
Imp qt)
6.3 (6.66, 5.54)
Item Unit
Model
F225FET FL225FET F250DET FL250DET
Valve lifter
Outside diameter mm (in) 30.970–30.980 (1.2193–1.2197)
Valve lifter clearance mm (in) 0.020–0.055 (0.0008–0.0022)
Camshaft
Cam lobe height
Intake mm (in) 46.661–46.761 (1.8370–1.8410)
Exhaust mm (in) 46.960–47.060 (1.8488–1.8528)
Cam lobe width
Intake and exhaust mm (in) 35.950–36.050 (1.4154–1.4193)
Journal diameter mm (in) 24.960–24.980 (0.9827–0.9835)
Runout mm (in) 0.030 (0.0012)
Cylinder head
Warpage limit mm (in) 0.10 (0.0039)
Journal inside diameter mm (in) 25.000–25.021 (0.9843–0.9851)
Valve spring
Free length mm (in) 48.1 (1.89)
Tilt limit mm (in) 1.7 (0.07)
Valve
Clearance
Intake mm (in) 0.205 ± 0.035 (0.0081 ± 0.0014)
Exhaust mm (in) 0.345 ± 0.035 (0.0136 ± 0.0014)
Seat contact width
Intake mm (in) 1.100–1.400 (0.0433–0.0551)
Exhaust mm (in) 1.400–1.700 (0.0551–0.0669)
Margin thickness
Intake mm (in) 0.750–1.150 (0.0295–0.0453)
Exhaust mm (in) 0.900–1.300 (0.0354–0.0512)
Item Unit
Model
F300BET FL300BET