SELVA MARINE Blue Whale 250 EFI, Service Manual

Page: 52 / 377

SPEC
Specification
2-3
6P23H11
Maintenance specification
2
Power unit
Item Unit
Model
250 R 250 L
Power unit
Minimum compression
pressure
(*1)
kPa
(kgf/cm
2
, psi)
740 (7.4, 107.3)
Oil pressure
(*2)
kPa
(kgf/cm
2
, psi)
600 (6.0, 87.0) at 60 °C (140 °F) with SL 10W-
30 engine oil and at 900 r/min
Cylinder head
Warpage limit mm (in) 0.1 (0.0039)
(lines indicate straightedge
position)
Camshaft cap inside diameter
mm (in) 25.000–25.021 (0.9843–0.9851)
Cylinder
Bore size mm (in) 94.000–94.017 (3.7008–3.7014)
Piston
Piston diameter (D) mm (in) 93.921–93.941 (3.6977–3.6985)
Measuring point (H) mm (in) 5.0 (0.20)
Piston clearance
(*3)
mm (in) 0.075–0.080 (0.0030–0.0031)
Piston pin boss bore mm (in) 21.017–21.031 (0.8274–0.8280)
Piston pin
Outside diameter mm (in) 20.995–21.000 (0.8266–0.8268)
Piston ring
Top ring
Dimension B mm (in) 1.17–1.19 (0.046–0.047)
Dimension T mm (in) 2.80–3.00 (0.110–0.118)
End gap
(*3)
mm (in) 0.15–0.30 (0.006–0.012)
Side clearance mm (in) 0.04–0.08 (0.002–0.003)
2nd piston ring
Dimension B mm (in) 1.17–1.19 (0.046–0.047)
Dimension T mm (in) 3.70–3.90 (0.146–0.154)
End gap
(*3)
mm (in) 0.30–0.45 (0.012–0.018)
Side clearance mm (in) 0.03–0.07 (0.001–0.003)
(*1)
Measuring conditions:
Ambient temperature 20 °C (68 °F), wide open throttle, with spark plugs removed from all cylinders.
The figures are for reference only.
(*2)
For details of the checking method, see Chapter 5, “Checking the oil pressure.”
The figures are for reference only.
(*3)
The figures are for reference only.