NUT – 8128201

Why pay dealer markup? Get genuine Mercury Marine quality at discount pricing. This NUT delivers OEM reliability with savings up to 20% below retail.

Engineered to Mercury’s rigorous OEM standards, this component ensures reliable operation across all engine RPM ranges. Part number 8128201 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 8128201 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: 30-40HP MARINER, MERCURY (EFI)

• Fits MARINER, MERCURY 30-40HP engines
• Compatible HP: 30HP, 40HP
• Model types: EFI
• Covers 24 serial number ranges
• Configurations: Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

30HP Models

• 30HP EFI (Mariner)
• 30HP EFI (Mercury)

40HP Models

• 40HP CARB (Mariner): 1B227000-1B344306, 1C000001-1C018825
• 40HP CARB (Mercury): 1B227000-1B344306, 1C000001-1C018825
• 40HP EFI (Mariner): 0P401000-0P515896, 1B227000-1B344398, 1C000001-1C049738, 0P153500-0P400999
• 40HP EFI (Mercury): 0P401000-0P515896, 1B227000-1B344398, 1C000001-1C049738, 0P153500-0P400999
• 40HP OUTBOARD (Mariner): 0P094500-0P206999, 0T178500-0T598999
• 40HP OUTBOARD (Mercury): 0P094500-0P206999, 0T178500-0T598999

Don’t know where your serial number is? Our quick reference guide shows exactly where to find it on Mercury Marine engines.

Verification & Support

Want to verify compatibility for part 8128201? 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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