HOUSING, Upper Water Pump – 16156

Don’t gamble with your Mercury’s reliability. This genuine HOUSING, Upper Water Pump ensures long-term performance and protects your investment in quality marine power.

Built with Mercury Marine’s precision engineering, this pump ensures reliable operation across all engine RPM ranges. Part number 16156 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.

Aftermarket parts might save a few dollars upfront, but genuine Mercury Marine part 16156 saves you money long-term by lasting years instead of months. Factory precision means perfect fit — no modifications, no surprises.

Compatible Mercury Marine Engines

FITS: 4HP MARINER, MERCURY

• Fits MARINER, MERCURY 4HP engines
• Compatible HP: 4HP
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

4HP Models

• 4HP OUTBOARD (Mariner): 0G710613-0T894438, 0P017000-0P400999, 0P073456-0P400999, 0P401000-0R411837, 0R000001-0R067089, 0R067090-0R411837, 0A855097-0G710612, 9589154-0P016999
• 4HP OUTBOARD (Mercury): 0G710613-0T894438, 0P017000-0P400999, 0P073456-0P400999, 0P401000-0R411837, 0R000001-0R067089, 0R067090-0R411837, 0A809601-0A855096, 9477830-9589153, 0A855097-0G710612, 9589154-0P016999

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

Verification & Support

Want to verify compatibility for part 16156? Use our parts finder tool for instant confirmation. Still have questions? No problem – use the contact buttons at the bottom of this page to reach us by text, call, or email

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