Smart boaters fix it right the first time. This factory LATCH, COWL-REAR ensures professional results even for DIY installation – we’ll help verify it’s the right part.

Built with Mercury Marine’s precision engineering, this component ensures reliable operation across all engine RPM ranges. Part number 43554A4 is manufactured to exact Mercury Marine factory specifications for precision installation and optimal performance. Constructed from premium marine-grade materials designed to withstand harsh saltwater and freshwater environments.

Cut-rate alternatives might look similar, but they’re not engineered to Mercury’s exacting standards. Part 43554A4 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 18-25HP MARINER, MERCURY

• Fits MARINER, MERCURY 18-25HP engines
• Compatible HP: 18HP, 20HP, 25HP
• Covers 18 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

18HP Models

• 18HP OUTBOARD (Mariner): 6443973-0B238463, 7209533-0A730006, 9378151-9507380
• 18HP OUTBOARD (Mercury): 6443973-0B238463, 7209533-0A730006, 9378151-9507380

20HP Models

• 20HP OUTBOARD (Mariner): 6443973-0B238463, 7209533-0A730006, 9415101-9507380
• 20HP OUTBOARD (Mercury): 6443973-0B238463, 7209533-0A730006, 9415101-9507380

25HP Models

• 25HP OUTBOARD (Mariner): 6443973-0B238463, 7209533-0A730006, 9415101-9507380
• 25HP OUTBOARD (Mercury): 6443973-0B238463, 7209533-0A730006, 9415101-9507380

Looking for your Mercury engine serial number? Our helpful guide shows you exactly where serial numbers are located on different engines.

Verification & Support

Double-check compatibility for part 43554A4 using our parts finder tool. Still need assistance? No worries – contact us via the buttons at the bottom of this page (text, call, or email)

Serving boaters for over 40 years. Best prices guaranteed – free shipping on orders over $100.