Sierra 18-7426 O-Ring for Mercury / MerCruiser 25-30271

Sierra 18-7426 is an O-ring for Mercury and MerCruiser applications. It cross-references Mercury Marine 25-30271 and 25-302713, with a listed inside diameter of 0.740 inch and width of 0.310 inch.

Sierra 18-7426 O-Ring for Mercury / MerCruiser 25-30271 is listed in the Laken Water Sports marine parts catalog for online ordering and Phoenix-area pickup. Confirm fitment, availability, and pickup timing with the parts team before ordering when compatibility is critical.

Fitment notes: Verify Sierra 18-7426 or Mercury / MerCruiser 25-30271 before ordering.