2001 Edition Yamaha F225A and LF225A Outboards Service Manual, Page 210Get this manual
LOWR Lower unit
5Install the propeller and propeller nut, and then tighten the nut finger tightPlace block of wood between the anticavitation plate and propeller to keep the propeller from turning, and then tighten the nut to the specified torque
Shift rod push arm: YB-06052 2Install the two dowel pins to the lower unit3Install the lower unit to the upper case, and then tighten the bolts to the specified torque4Install the trim tab to its original position, and then tighten the bolt to the specified torque
WARNING
Do not hold the propeller with your hands when loosening or tightening itBe sure to disconnect the battery cables from the batteries and the engine shut-off switchPut block of wood between the anti-cavitation plate and propeller to keep the propeller from turningNOTE: If the grooves in the propeller nut do not align with the cotter pin hole, tighten the nut until they are alignedPropeller nut 5: 55 Nm (5.5 kgfm, 40 ftlb)