Weekend coming up? Order this Mercury O-RING, BEARING CARRIER 2,15Componet of Engine Gasket Set [27- 85489A87] :Component of Water Pump Seal Kit [26- 79831A 1] now for fast shipping. Most orders placed by 1pm ship today so you’re fishing, not fixing.

Factory-built to exact Mercury Marine specifications, this pump ensures reliable operation across all engine RPM ranges. Part number 31986 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 31986 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: 0-402HP MARINER, MERCRUISER, MERCURY

• Fits MARINER, MERCRUISER, MERCURY 0-402HP engines
• Compatible with 7 different HP configurations
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard, Sterndrive
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

0HP Models

• 0HP STERNDRIVE (Mercruiser): 1830753-2063740

30HP Models

• 30HP JET (Mariner): 0C159200-0G589999
• 30HP JET (Mercury): 0C159200-0G589999

35HP Models

• 35HP OUTBOARD (Mercury): 6445653-0B110788

40HP Models

• 40HP OUTBOARD (Mariner)
• 40HP OUTBOARD (Mercury)

350HP Models

• 350HP OUTBOARD (Mercury): 1571114-1812753, 1812754-1960826, 1960827-2874703

400HP Models

• 400HP OUTBOARD (Mercury): 2874704-3336257

402HP Models

• 402HP OUTBOARD (Mercury): 3336258-4117709, 3339688-9076838, 3340783-7047607, 4117710-4860102, 7047608-7112422, 8002335-8027439

Need help finding your serial number? Check our serial number location guide for step-by-step instructions on locating it on your Mercury engine.

Verification & Support

Want to verify compatibility for part 31986? 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

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