Stop fighting with your Mercury engine. This factory-spec VALVE, Inlet Needle eliminates common issues and delivers the smooth operation you expect from genuine OEM components.

Designed and manufactured to Mercury Marine OEM standards, this component ensures reliable operation across all engine RPM ranges. Part number 803861 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 803861 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: 10-15HP MARINER, MERCURY (MAGNUM, MARATHON, SEA PRO)

• Fits MARINER, MERCURY 10-15HP engines
• Compatible HP: 10HP, 15HP
• Model types: MAGNUM, MARATHON, SEA PRO
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

10HP Models

• 10HP MAGNUM (Mariner): 0G760300-0T979999, 0P017000-0P325499
• 10HP MARATHON (Mariner): 0G760300-0T979999, 0P017000-0P325499, 0T980000-0T999999
• 10HP SEA PRO (Mercury): 0G760300-0T979999, 0P017000-0P325499, 0T980000-0T999999
• 10HP VIKING (Mariner): 0P017000-0P325499
• 10HP VIKING (Mercury): 0P017000-0P325499

15HP Models

• 15HP OUTBOARD (Mariner): 0G760300-0T979999, 0P017000-0P325499, 0T980000-0T999999
• 15HP OUTBOARD (Mercury): 0G760300-0T979999, 0P017000-0P325499, 0T980000-0T999999

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

Double-check compatibility for part 803861 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)

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