GENERAL SERVICE INFORMATION Tightening Torques for Standard Bolts and Nuts 12/05 TIGHTENING TORQUES FOR STANDARD BOLTS AND NUTS Tightening Fasteners Use the correct amount of torque when tightening fasteners. Applying excessive torque may damage the fastener or component and not enough torque may cause a leak or component failure. Hexagon Bolts and Nuts Hose Clamps NOTICE: NEVER reuse or retighten hose clamps. ALWAYS install new hose clamps.
© 2009 Yanmar Marine International Nominal Diameter Grade (Lubricated) 8.8 or 8 10.9 or 10 12.9 or 12 M4 2.7 N·m (24 in.-lb) 3.88 N·m (34.3 in.-lb) 4.6 N·m (41 in.-lb) M5 5.5 N·m (48.6 in.-lb) 8 N·m (71 in.-lb) 9.5 N·m (84 in.-lb) M6 9.5 N·m (84 in.-lb) 13 N·m (115 in.-lb) 16 N·m (142 in.-lb) M7 15 N·m (133 in.-lb) 22 N·m (195 in.-lb) 26 N·m (230 in.-lb) M8 23 N·m (204 in.-lb) 32 N·m (24 ft-lb) 39 N·m (29 ft-lb) M8 x 1 25 N·m (221 in.-lb) 35 N·m (26 ft-lb) 42 N·m (31 ft-lb) M10 46 N·m (34 ft-lb) 64 N·m (47 ft-lb) 77 N·m (57 ft-lb) M10 x 1.25 49 N·m (36 ft-lb) 68 N·m (50 ft-lb) 82 N·m (60 ft-lb) M12 80 N·m (59 ft-lb) 110 N·m (81 ft-lb) 135 N·m (100 ft-lb) M12 x 1.5 88 N·m (65 ft-lb) 125 N·m (92 ft-lb) 150 N·m (111 ft-lb) Size Specification 5 mm Hex Head 1.0 to 1.5 N·m (8.9 to 13 in.-lb) 6 mm Hex Head 2.5 to 3.5 N·m (22 to 31 in.-lb) BY Service Manual 3-23