Extend your Mercury engine’s life with this premium OEM SCREW, (#10-16 x .600). Factory-engineered for durability in harsh marine conditions that destroy inferior parts.

Engineered to Mercury’s rigorous OEM standards, this component ensures reliable operation across all engine RPM ranges. Part number 878609 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.

Factory parts exist for a reason — they work. Part 878609 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

Compatible Mercury Marine Engines

FITS: 100-115HP MARINER, MERCURY (DFI, EFI)

• Fits MARINER, MERCURY 100-115HP engines
• Compatible HP: 100HP, 110HP, 115HP
• Model types: DFI, EFI
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

100HP Models

• 100HP EFI (Mariner): 0P459572-2B059605, 1B227000-1B366822, 1B366823-2B059605
• 100HP EFI (Mercury): 0P459572-2B059605, 1B227000-1B366822, 1B366823-2B059605
• 100HP OUTBOARD (Mariner): 0G760300-0G965520, 0P017000-0P058999
• 100HP OUTBOARD (Mercury): 0G760300-0G965520, 0P017000-0P058999

110HP Models

• 110HP JET (Mercury)

115HP Models

• 115HP DFI (Mercury): 0T801000-1B226999
• 115HP OUTBOARD (Mariner): 0G760300-0T979999, 0P017000-0P325499, 0T980000-0T999999
• 115HP 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 878609 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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