FOR GEN. 1 SDS PROPS WITH PART NUMBER ENDING IN "00-00" OR "10-00." GEN. 2 SDS PROPS END IN "20-00" AND USE PART # 688-45997-01-00.

F300-F90 (pre 2018) – 6CE-45997-00-00
Early SDS washers used mechanical stops in the washer and are
easily identifiable by the cutouts in the propeller and the distinct shape
of the washer. This was designed specifically for the notches in
the propeller.
6CE-45997-00-00