Yanmar 6LY3 series Service Manual

ENGINE
Inspecting the Cylinder Block and Components
5-24 6LY3 Service Manual
© 2007 Yanmar Marine International
Fabricating a Freeze Plug Driver
Figure 5-11
Figure 5-11
Measuring the Cylinder Bores
Clean the mating surface of the cylinder head, the
cylinder bores and all oil passages. Check the
following items after removing any carbon deposits
and / or gasket material residue.
• Check for any discoloration or cracks. If a crack is
suspected, perform a dye penetrant inspection.
Clean and clear all oil passages.
• Measure the cylinder bore dimensions and
compare the measurements to the allowable
limits. Inspect the cylinder bore(s) for physical
damage and out-of-round conditions.
Figure 5-12
Figure 5-12
• Measure at 20 mm (0.8 in.) (Figure 5-13, (1))
below the top of the cylinder bore.
Figure 5-13
Figure 5-13
1 – 20 mm (0.787 in.) Below Top of Cylinder Bar.
2 – Center of Piston Travel.
3 – 20 mm (0.787 in.) from Bottom of Piston
Skirt.
4 – Measure in Both Directions 4 at Points 1, 2
and 3.
5 – Measure in Both Directions 5 at Points 1, 2
and 3.
• Measure at the center of piston travel
(Figure 5-13, (2)).
• Measure at 20 mm (0.787 in.) (Figure 5-13, (3))
from the bottom of the piston skirt in directions 4
and 5 as shown in Figure 5-13.
NOTICE: Direction 4 is the crankshaft center line.
0005593
D2
L1
L2 L3
L4
L5
R
2
R 2
R2
R2
D3D1D2 D4
Plug Diameter D1 D2 D3 D4 L1 L2 L3 L4 L5
Ø16
(0.63 in.)
12.0 mm
(0.472 in.)
20.0 mm
(0.787 in.)
10.0 mm
(0.393 in.)
10.0 mm
(0.393 in.)
2.5 mm
(0.098 in.)
4.0 mm
(0.157 in.)
20.0 mm
(0.787 in.)
30.0 mm
(1.181 in.)
150.0 mm
(5.905 in.)
Ø40 mm
(1.574 in.)
36.0 mm
(1.417 in.)
48.0 mm
(1.889 in.)
34.0 mm
(1.338 in.)
28.0 mm
(1.102 in.)
8.5 mm
(0.334 in.)
10.0 mm
(0.393 in.)
20.0 mm
(0.787 in.)
30.0 mm
(1.181 in.)
150.0 mm
(5.905 in.)
0005594
0005595
(4)
(1)
(2)
(3)
(5)
20 mm (0.787 in.)
20 mm
(0.787 in.)

Yanmar 6LY3 series Specifications

General

Brand	Yanmar
Model	6LY3 series
Category	Engine
Language	English