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Sierra Marine 18-3703 Prop Nut, For Mercury/Mariner 9.9-25hp '86 and up

Item # 900431
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In Stock


  • For use with Mercury/Mariner 9.9-25 hp

  • Replaces OE No. 11-88228

  • Sierra Part No. 18-3703

Product Summary 

Worn or scored prop nuts can cause damage to your prop shaft and propeller face. Protect your drive system by changing your prop nut when replacing or inspecting your propeller.

Sierra No. 18-3703
For use with Mercury/Mariner: 9.9 - 25 hp, 1986 and up
Replaces No. 11-88228