Factory EVINRUDE Retaining Ring (#0318603) – Authentic OEM replacement from U.S. Boatworks. Trusted for 40+ years nationwide.

Family-owned and trusted since 1984, U.S. Boatworks specializes in hard-to-find EVINRUDE parts like #0318603. Our team is here to help — DIY boater or professional mechanic.

Choose Quality, Choose OEM

• Factory-engineered for your exact engine
• Built to withstand marine conditions
• Better performance than generic parts

FITS: Verify compatibility for your engine — use our boat parts finder to find the right parts by model and year.

MARINE PARTS SPECIALISTS

• Hard-to-find parts? We’ve got them — including #0318603
• Trusted by boaters nationwide since 1984
• Unsure about compatibility? See contact options below ↓

Find everything your engine needs — explore our Boat Parts Finder to search by model and year.