2009 Yamaha F40 Outboard Service Manual, Page 290Get this manual
Steering friction
2Install the tiller handleSee "Installing the tiller handle" (3-10)3Move the steering lock lever to the position a, and then tighten the friction adjusting nut to the specified torqueFriction adjusting nut d: Nm (0.4 kgfm, 3.0 ftlb)