Marine-grade aftermarket gearbox trim tab sacrificial anode for selected 9.9, 13.5, 15, 20 and 25 HP Mercury / Mariner outboard engines, including compatible 2-stroke, 4-stroke BigFoot and Jet models.

Designed to help protect the gearbox and lower unit against galvanic corrosion, particularly in saltwater environments.

Available in Zinc or Aluminium.

Replaces Mercury / Quicksilver Part Numbers: 98432Q6 and 98432T6.

Choose Your Anode Material

Zinc Anode

Traditional sacrificial anode material
Particularly suitable for saltwater applications

Aluminium Anode

Marine-grade aluminium alloy
Suitable for saltwater and brackish water applications
Lightweight alternative to zinc

Please follow the engine manufacturer's recommendations when selecting anode material.

Fitment – Mercury / Mariner Outboards

4-Stroke BigFoot Models

9.9 HP – 4-Stroke BigFoot

13.5 HP – 4-Stroke BigFoot

15 HP – 4-Stroke BigFoot

Applicable serial number ranges for selected models:

0G760300 – 1B226999
0P075166 – 0P400999
0P401000 and Above
1B227000 and Above

Important: BigFoot gearbox applications only. Not suitable for standard gearbox models unless the original trim tab reference matches.

2-Stroke Models – 2 Cylinder

15 HP – 2-Stroke

20 HP – 2-Stroke

25 HP – 2-Stroke

Applicable serial number ranges for selected models:

0P325500 and Above
0T980000 – 0T999999
1B000001 and Above

Jet Models

20 JET – Mercury Outboard

Applicable serial number ranges:

0T980000 – 0T999999
1B000001 and Above

Important: Jet model fitment must be confirmed against the original anode and lower unit arrangement.

Fitment Notes

Mercury / Mariner used different gearbox and trim tab designs across production years.

Compatibility depends on:

Engine model and horsepower
2-stroke or 4-stroke configuration
BigFoot or standard gearbox
Engine serial number
Original anode part number

Replaces Mercury / Quicksilver Part Numbers

98432Q6 – Main product reference
98432T6 – Alternative Mercury reference

OEM part numbers are used for identification and compatibility reference only.

Product Details

Product Type: Gearbox Trim Tab Anode
Material: Zinc or Aluminium
Application: Mercury / Mariner Outboards
Horsepower: 9.9, 13.5, 15, 20 and 25 HP
Engine Type: Selected 2-Stroke and 4-Stroke
Gearbox: Selected BigFoot and compatible 2-stroke applications
Location: Gearbox / Lower Unit
Purpose: Sacrificial corrosion protection
Quality: Marine-grade aftermarket replacement
Quantity: 1 anode

Package Includes

1 × Trim Tab Anode

Supplied in your selected material:

Zinc
Aluminium

Mounting hardware is not included unless otherwise specified.

Important Compatibility Information

Before ordering, please check:

Exact Mercury / Mariner engine model
Engine horsepower and stroke type
Engine serial number
BigFoot or standard gearbox configuration
Original anode part number
Existing trim tab shape and dimensions
Required anode material

If the part looks the same as yours, this does not always mean it is the correct part for your outboard.

If unsure, please contact SSI Marine with your engine model and serial number for assistance.

Why Buy From SSI Marine?

Workshop-tested aftermarket & OEM-spec parts
Same-day dispatch before 1 PM Monday–Friday
Royal Mail Tracked 24
UK stock – collection available from Leigh, Greater Manchester
Technical support from experienced outboard specialists

Buyer Responsibility

Please confirm compatibility with your exact Mercury / Mariner engine model, serial number and gearbox configuration before purchase.

9.9–25 HP Mercury Mariner Outboard Trim Tab Anode 98432Q6 / 98432T6 – Zinc / Aluminium