1999 Volvo Penta "WT" Models Workshop Manual, Page 47Get this manual
General Torque Specifications The following specifications are for nut and screw sizes not having specific torque recommendations
U.SScrew Sizes
6 10 12 -20
NoNoNoNo38 -16 716 -14
Metric Thread Sizes
8-12 19-28 38-54 68-96 108-155
2-3.5 3-4 5-7
20-25 32-40
2,2-2,8 2,7-4,7 4,1-5,4 6,8-9,5 15-1 27-34 43-54