A.A Zinc Trim Tab Anode for Yamaha 60–100HP 4-Stroke — OEM Fit, Corrosion Protection

A.A Zinc trim tab anode designed to replace Yamaha 60–100HP 4-stroke factory anodes and protect lower units from galvanic corrosion.

This zinc trim tab anode is a direct replacement for common Yamaha part numbers used on many 60–100 horsepower four-stroke outboards. It installs on the trim tab to sacrificially corrode instead of your aluminum lower unit and is sized to match OEM fitment, bolt pattern, and profile for straightforward swap-outs. The part is compatible with numerous Yamaha model codes, making it a practical spare for boat owners and service shops that maintain mid-range outboards.

Which Yamaha engines does this anode fit?

The A.A Zinc trim tab anode replaces multiple Yamaha part numbers and fits a wide group of 60–100HP four-stroke outboards from different production years. Check the listed OEM references and the bolt hole spacing on your trim tab to confirm fitment before ordering.

• Replaces Yamaha parts: 67F-45371-00, 688-45371-02-00, 688-45371-01-00
• Works with F70, F75, F80, F90, F100 series model codes listed in product features
• Designed for 60–100HP four-stroke lower units where OEM trim-tab anode is used

How do I install the replacement trim tab anode?

Installation is a simple service task for most mechanically inclined boat owners or technicians. Remove the old anode, clean mating surfaces, align the new part to OEM bolt holes, and tighten to the manufacturer's torque recommendations.

• Remove the trim tab anode bolts and old anode
• Clean corrosion and debris from the attachment area for good metal-to-metal contact
• Fit the A.A anode, secure bolts evenly, and check alignment during launch

What materials and design features matter for performance?

This product is cast from high-purity zinc chosen for predictable sacrificial behavior in salt and brackish water. The shape and thickness mirror OEM geometry to ensure electrical contact and hydrodynamic compatibility with the lower unit.

• High-quality zinc alloy formulated for galvanic protection
• OEM-style profile and bolt pattern for direct replacement
• Corrosion-ready finish to prolong effective service life until replacement

How often should the trim tab anode be inspected or replaced?

Frequency depends on water type and usage: saltwater exposure accelerates wear while freshwater slows it. Inspect the anode at routine service intervals and replace it when more than 50% of the mass is consumed or when pitting compromises fitment.

• Inspect visually every season or after extended exposure to saltwater
• Replace when anode is more than 50% eroded or misshapen
• Keep spare anodes on-hand if boating frequently in corrosive environments

Who is this for: Boat owners, mechanics, and service yards maintaining Yamaha 60–100HP four-stroke outboards who need a reliable, OEM-compatible zinc trim tab anode. Ideal for those who prefer direct-fit aftermarket parts that match factory dimensions, simplify maintenance, and help prevent costly lower-unit corrosion over time.