An O.S. Safety Propeller Locknut assembly prevents the propeller from being thrown even if it becomes loose in operation. Particularly suitable for medium to larger four strokes and essential for engines that are prone to kicking the prop free due to a backfire. Supplied as standard with all O.S. four strokes from .70 cu.in. capacity and up.
|Type of Engine:
||FT-240, FT-300, FR5-300
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