This Is the 7 x 1mm Prop Lock from Harry B Higley.|
An electric starter or a backfire can cause the propeller to spin off
especially with four-stroke engines. Any mechanic knows a second
nut, screwed against the original one, locks both tightly in place.
This Prop Lock replaces the propeller washer. A normal nut, or Heavy
Hub is screwed against the Prop Lock.
(1) Prop Lock
SPECS Shaft Size: 7x1mm