2000-2005 Yamaha F40B Outboard Service Manual, Page 248Get this manual
IpOWRI& CRANKSHAFT AND PISTON 1st 2nd 15 Nm (1.5kgf, 11 ft -Ib) 3ONm(3.0mkgf, 22ft- Ib)
2nd Nm (0.6 kgf, 4.3 ft Ib) 12 Nm (12 kgf, 8.7ft Ib)
8.4 Nm (0.8 kgf, 5.9 ft Ib) 40