Mercury 25 EFI FourStroke User Manual page 161

NOTE: If the propeller nut does not align with the propeller shaft
hole after tightening to the specified torque, then tighten the nut
further to align it with the hole in the propeller shaft.
6. Align the propeller nut with the propeller shaft hole. Insert a
new cotter pin in the hole and bend the cotter pin ends.
Description
Propeller nut
eng
INSTALLATION
28353
151
Nm lb. in.
25
28351
lb. ft.
18