ENGINE
Special Torque Chart
5-10 BY Service Manual
© 2009 Yanmar Marine International
Fuel System
Fuel Injection
Nozzles and Lines
Fuel Injector in Cylinder Head
Cover
4BY2
6BY2
M6
-
9 N·m (80 in.-lb)
High-Pressure Line Union
Nuts
4BY2
6BY2
M14 x 1.5
-
23 N·m (204 in.-lb)
Pressure Sensor to Fuel Rail 4BY2
6BY2
-
-
70 N·m (52 ft-lb)
Pressure Regulator to Fuel
Rail
4BY2
6BY2
-
-
80 N·m (59 ft-lb)
Fuel Return to Rail 4BY2
6BY2
Banjo Bolt
-
25 N·m (221 in.-lb)
Poly V-Belt Drive
Idler Pulley to Alternator
Bracket
4BY2
M8 x 35
Grade 10.9
-
28 N·m (21 ft-lb)
Thermostat and
Coolant Pipes
Coolant Return Pipe to
Crankcase and Oil Filter
Housing
4BY2 M8x18
-
11 N·m (97 in.-lb)
Glow Plugs
Glow Plugs 4BY2
6BY2
-
-
17.5 N·m (154 in.-lb)
System Component Model Thread Comments Specification
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