91-17256 91-36235 18-9803 Spanner Nut Wrench for MerCruiser Alpha One Bravo

Product Overview

This spanner nut wrench is designed for removing and installing the spanner nut on MerCruiser Alpha One and Bravo stern drives. It provides a secure grip to prevent damage during gearcase service. Essential for marine mechanics and DIY boat owners who need a reliable spanner nut wrench.

Key Features & Performance

• Precision fit for MerCruiser Alpha One (Gen I & II) and Bravo (One, Two, Three) drives
• Durable forged steel construction for long-lasting use
• Matches OEM part numbers 91-17256, 91-36235, and 18-9803
• Designed to prevent slipping and rounding of the nut
• Easy to use with standard ratchet or breaker bar

Fitment & Compatibility

• MerCruiser Alpha One (Gen I and Gen II)
• MerCruiser Bravo One
• MerCruiser Bravo Two
• MerCruiser Bravo Three
• Compatible with many 1990s–2000s models using the listed OEM part numbers

Common Uses

• Removing the spanner nut during gearcase removal
• Servicing the water pump on MerCruiser drives
• Replacing shift components or drive shaft seals
• Adjusting the spanner nut for proper gear alignment

Technical Specifications

• Part Number(s): 91-17256, 91-36235, 18-9803
• Material: Forged steel
• Tool Type: Spanner nut wrench

Frequently Asked Questions

Q: Will this wrench fit a 2003 MerCruiser Bravo Three? A: Yes, it is designed for both Alpha One and Bravo series, including Bravo Three drives.

Q: Is this a genuine OEM MerCruiser tool? A: This is a high-quality aftermarket replacement tool that meets OEM specifications and matches the original part numbers.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.