Westerbeke 20B TWO Tehnical Manual

Specified Value/Standard
Repair Limit
Rocker Arm
Rocker arm 1.0.
0.472
(12 mm)
Rocker arm
to shaft clearance
-0.008 (Service limit)
(-0.2 mm)
Cylinder Block
Camshaft hole dia.
Front
1.654 Ball bearing hole
(42 mm)
NO.2 1.339
(34 mm)
No.3 (30B Three only) 1.299
(33 mm)
Rear 1.299
(33 mm)
Cylinder Bore
Bore size 2.992
+0.008
(76 mm)
(+0.2 mm)
Oversize finish tolerance
o - 0.001 for each oversize
(0 -0.03 mm)
Cylindricity Within
0.0004
(0.01 mm)
Gasket fitting/surface distortion Within
0.0020
0.004
(0.05 mm) (0.1 mm)
Piston
Type
Solid type
Material
Aluminum alloy
0.0. (skirt end)
2.992
(76 mm)
Clearance to cylinder
0.001 (Service limit)
(0.3 mm)
17
Westerbeke Engines

Westerbeke 20B TWO Specifications

General

Brand	Westerbeke
Model	20B TWO
Category	Engine
Language	English