Maintenance Specification; Power Unit - SELVA MARINE Blue Whale 250 EFI Service Manual

SPEC

Maintenance specification

Power unit

Item
Power unit
Minimum compression
(*1)
pressure
(*2)
Oil pressure
Cylinder head
Warpage limit
(lines indicate straightedge
position)
Camshaft cap inside diameter
Cylinder
Bore size
Piston
Piston diameter (D)
Measuring point (H)
(*3)
Piston clearance
Piston pin boss bore
Piston pin
Outside diameter
Piston ring
Top ring
Dimension B
Dimension T
(*3)
End gap
Side clearance
2nd piston ring
Dimension B
Dimension T
(*3)
End gap
Side clearance
(*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.
2-3
Specification
Unit
kPa
(kgf/cm
kPa
(kgf/cm
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
mm (in)
250 R
2
, psi)
600 (6.0, 87.0) at 60 °C (140 °F) with SL 10W-
2
, psi) 30 engine oil and at 900 r/min
25.000–25.021 (0.9843–0.9851)
94.000–94.017 (3.7008–3.7014)
93.921–93.941 (3.6977–3.6985)
0.075–0.080 (0.0030–0.0031)
21.017–21.031 (0.8274–0.8280)
20.995–21.000 (0.8266–0.8268)
1.17–1.19 (0.046–0.047)
2.80–3.00 (0.110–0.118)
0.15–0.30 (0.006–0.012)
0.04–0.08 (0.002–0.003)
1.17–1.19 (0.046–0.047)
3.70–3.90 (0.146–0.154)
0.30–0.45 (0.012–0.018)
0.03–0.07 (0.001–0.003)
Model
250 L
740 (7.4, 107.3)
0.1 (0.0039)
5.0 (0.20)
2
6P23H11