Key Check - MARINE PROPELLER JPROP Use And Maintenance Handbook

Section 2 - KEY CHECK
This check avoid serious damage to the propeller.
Make sure that the key:
1 - is at least 8 mm (5/16") away from the aft side of cone;
2 - does not touch the upper or the aft side of keyway
of the propeller ;
3 - does not have too much clearance in the keyway of the
shaft or sideways in the keyway of the propeller.
OK!
min. 8 mm
NO! NO!
NO!
NO!
NO!
NO!
3