Don’t miss another weekend. This genuine Mercury Marine IMPELLER COMPONENT OF WATER PUMP REPAIR KIT [46-803750A06] ships fast and installs easily – get back on the water where you belong.

Engineered to Mercury’s rigorous OEM standards, this pump ensures reliable operation across all engine RPM ranges. Part number 803748 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 803748 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 8-20HP MARINER, MERCURY

• Fits MARINER, MERCURY 8-20HP engines
• Compatible HP: 8HP, 9HP, 10HP, 15HP, 18HP, 20HP
• Covers 23 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

8HP Models

• 8HP OUTBOARD (Mariner)
• 8HP OUTBOARD (Mercury)

9HP Models

• 9HP OUTBOARD (Mariner)
• 9HP OUTBOARD (Mercury)

10HP Models

• 10HP OUTBOARD (Mercury)

15HP Models

• 15HP OUTBOARD (Mariner): 0N001590-0N055284
• 15HP OUTBOARD (Mercury): 0N001590-0N055284
• 15HP SEAPRO (Mercury): 0R051685-0R123564

18HP Models

• 18HP OUTBOARD (Mercury): 0N001590-0N055284

20HP Models

• 20HP OUTBOARD (Mariner)
• 20HP OUTBOARD (Mercury)

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

Verification & Support

Verify part 803748 works with your Mercury using our parts finder tool. Have questions? Reach out using the contact buttons at the bottom of this page — our team is here to help by text, call, or email

40+ years of marine expertise. Competitive pricing, same-day shipping on most orders.