Take control of your Mercury maintenance with this genuine NUT, (.437-20) Brass/Nickel Plated (Bravo)(Alpha – Closed Cooling). Straightforward replacement that delivers factory results without shop labor costs.

Manufactured to strict Mercury Marine quality standards, this component ensures reliable operation across all engine RPM ranges. Part number 859135 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.

Cut-rate alternatives might look similar, but they’re not engineered to Mercury’s exacting standards. Part 859135 delivers consistent performance because it’s built right — the same way Mercury does it at the factory.

Compatible Mercury Marine Engines

FITS: 102-350HP MERCRUISER, RACE STERNDRIVE

• Fits MERCRUISER, RACE STERNDRIVE 102-350HP engines
• Compatible with 7 different HP configurations
• Covers 24 serial number ranges
• Configurations: Outboard, Sterndrive
• OEM genuine Mercury Marine part

COMPLETE SERIAL NUMBER COMPATIBILITY:

102HP Models

• 102HP STERNDRIVE (Race Sterndrive)

107HP Models

• 107HP STERNDRIVE (Race Sterndrive): 0M905359-0M957024, 0M957032-0M962885

110HP Models

• 110HP STERNDRIVE (Race Sterndrive)

120HP Models

• 120HP STERNDRIVE (Race Sterndrive): 0M956534-0M962885

135HP Models

• 135HP STERNDRIVE (Race Sterndrive)

165HP Models

• 165HP STERNDRIVE (Race Sterndrive)

350HP Models

• 350HP MAG MPI (Mercruiser): 0M300000-0M599999, 0M600000-0W059999, 0W060000-0W309999
• 350HP OUTBOARD (Mercruiser): 0L331599-0M299999, 0M300000-0M599999, 0M600000-0W059999, 0W060000-0W309999, 0W310000-0W649999, 0W650000-1A299999, 1A300000-1A611927, 1A611928-1A623184, 1A300000-1A611927, 1A611928-1A623184

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

Not sure if part 859135 fits your engine? Try our parts finder tool — it’s quick and easy. Need expert help? Contact us using the buttons at the bottom of this page – text, call, or email, whatever works best for you

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