QUICKMARINE Outboard Trim Tab Anode Model 688-45371 Zinc for Yamaha 50-90 HP with Mounting Bolt

QUICKMARINE 688-45371-01 is a zinc sacrificial trim tab anode with bolt, built to protect and stabilize Yamaha 50–90 HP outboard lower casings.

If you run a Yamaha 50, 60, 70, 75, 85 or 90 horsepower outboard, this trim tab anode replaces worn or missing corrosion protection and restores the hydrodynamic balance that helps steering and trim. Made from a zinc alloy, the unit is sacrificial: it corrodes preferentially to ferrous and aluminum components, extending the life of your lower unit and trim tab. It ships with the mounting bolt for a straightforward swap over compatible OEM and aftermarket references.

How does this anode protect my outboard from corrosion?

The QUICKMARINE trim tab anode attracts corrosive electrochemical activity, sacrificing itself to prevent damage to the metal trim tab and adjacent lower unit parts. Because it is placed where stray currents or galvanic corrosion would attack, it slows degradation of more expensive components.

• Made from zinc alloy formulated for marine cathodic protection
• Positioned on the trim tab where corrosion commonly starts
• Sacrificial action reduces pitting and galvanic wear on the lower casing

Will this part fit my Yamaha 50–90 HP outboard?

This anode is designed specifically for many Yamaha lower-unit configurations in the 50–90 HP range and matches several OEM and aftermarket part numbers. It’s a direct replacement for common references, making compatibility checks simple before purchase.

• Direct replacement for Yamaha references like 67F-45371-00 and related numbers
• Cross-compatible with GLM 12881 and multiple aftermarket codes
• Includes the required bolt to streamline installation on compatible models

How easy is installation and what tools do I need?

Installation is straightforward for anyone comfortable with basic outboard maintenance. The kit includes the trim tab anode and one mounting bolt so you only need common hand tools to remove the old anode and fit the new one.

• Remove old anode using a socket or wrench sized for the bolt
• Clean mounting surface to ensure good contact and proper alignment
• Tighten supplied bolt to manufacturer torque recommendations (hand tools required)

What performance benefits does the trim tab anode provide?

Beyond corrosion protection, replacing a worn trim tab anode restores the intended hydrodynamic trim and steering balance of the outboard. That can lead to more consistent handling, reduced vibration, and better control at planing speeds.

• Helps maintain correct trim tab angle for stable steering and tracking
• Reduces vibration caused by uneven erosion or missing anode material
• Contributes to longer service life for lower-unit components

Package contents include one QUICKMARINE zinc alloy trim tab anode and one mounting bolt. This part is commonly cross-referenced with Yamaha 67F-45371-00, 688-45371-01, 688-45371-02, 6K5-45251-00, 6K5-45371-00, GLM 12881, and aftermarket equivalents such as Tecnoseal 01104/01104MG, CMP CM6884537102Z, and Sierra 18-6070/18-6111.

Who is this for: boat owners, mariners and maintenance technicians running Yamaha 50–90 HP outboards who need an affordable, OEM-compatible sacrificial anode to prevent galvanic damage and keep steering and trim performance consistent. It’s suited for routine winterization projects, spring prep, or any time a visible anode is corroded or missing and needs a direct-fit replacement.