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

Manufactured to strict Mercury Marine quality standards, this component ensures reliable operation across all engine RPM ranges. Part number 76451 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 76451 undergoes rigorous Mercury Marine quality testing that aftermarket manufacturers skip. The result? Reliable performance season after season.

Compatible Mercury Marine Engines

FITS: 2-200HP MARINER, MERCURY, RACE OUTBOARD

• Fits MARINER, MERCURY, RACE OUTBOARD 2-200HP engines
• Compatible with 7 different HP configurations
• Covers 24 serial number ranges
• Configurations: Jet Drive, Outboard
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

2HP Models

• 2HP OUTBOARD (Race Outboard): 0T997974-1E000796

105HP Models

• 105HP JET (Mariner): 0D082000-0G303045, 0G303046-0G760299
• 105HP JET (Mercury): 0D082000-0G303045, 0G303046-0G760299

110HP Models

• 110HP JET (Mercury)

140HP Models

• 140HP JET (Mariner): 0D082000-0G303045, 0G303046-0G760299, 0G760300-0G960499, 0G960500-0T178499
• 140HP JET (Mercury): 0D082000-0G303045, 0G303046-0G760299, 0G760300-0G960499, 0G960500-0T178499

150HP Models

• 150HP OUTBOARD (Mercury)
• 150HP OUTBOARD (Race Outboard): 0D935000-0G610049, 0G610050-0G856999

175HP Models

• 175HP PROXS (Mercury)

200HP Models

• 200HP OUTBOARD (Mariner): 0T750164-0T800999, 0T801000-1B417701
• 200HP OUTBOARD (Mercury): 0T980000-1B417701, 1B417702-1B504988, 0T750164-0T800999

Not sure where to find your engine’s serial number? View our quick reference guide to locate it on your Mercury Marine engine.

Verification & Support

Questions about part 76451? Use our parts finder tool to verify fitment yourself. Prefer to talk to an expert? Use the contact buttons at the bottom of this page to reach our team by text, call, or email

Four decades of marine parts experience. Competitive pricing, same-day shipping on most orders.