Skip to content Skip to navigation menu
Live Chat

Sierra-Propnut Merc Kit


Add to My List
In stock online.
Model # 549790 | Mfg # 18-3701D

The prop nuts (lock nut design) bolt the prop to the prop shaft. The tab washer has ears, that when pressed down over the prop space nut, prevent the prop nut from loosening. 

  • The prop nuts are made of brass and the washers of stainless steel.

West Advisor

The West Advisor articles have answered boaters' questions and provided solutions to boating problems for more than 20 years. West Marine has compiled one of the Web's most comprehensive collections of technical boating information articles.