30–300 HP Mercury Mariner Outboard Power Trim Anode 818298Q1 – Zinc / Aluminium

Marine-grade aftermarket power trim sacrificial anode for selected 30–300 HP Mercury and Mariner 2-stroke and 4-stroke outboard engines.

Designed to protect the external power trim pump assembly, transom bracket and surrounding metal components against galvanic corrosion.

The anode is fitted to the bottom of the external power trim pump assembly.

Main Part Number: 818298Q1

Available in Zinc or Aluminium.

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

• Corresponds to the material used for Mercury's original 818298Q1 anode

Please follow Mercury's recommendations when selecting the appropriate material.

Fitment – Mercury / Mariner Outboards

4-Stroke Models

30 HP

• 30 HP FourStroke – selected models

40 HP

• 40 HP FourStroke – selected models

• 40 HP – 4-cylinder

75 HP

• 75 HP FourStroke – selected models

90 HP

• 90 HP FourStroke – selected models

2-Stroke Models

40 HP

• 40 HP – 4-cylinder

50 HP

• 50 HP – 3-cylinder, 1987–1997

55 HP

• 55 HP – 3-cylinder

60–90 HP

• 60 HP – 3-cylinder, 1987 onwards

• 65 HP – selected 3-cylinder applications

• 70 HP – selected 3-cylinder applications

• 75 HP – 3-cylinder, 1987 onwards

• 80 HP – 3-cylinder, 1987 onwards

• 85 HP – selected 3-cylinder applications

• 90 HP – 3-cylinder, 1987 onwards

75 HP

• 75 HP – 4-cylinder

100–125 HP

• 100 HP – 4-cylinder

• 115 HP – 4-cylinder

• 125 HP – 4-cylinder

115 HP

• 115 HP – 6-cylinder, 1984–1988

V6 / EFI / OptiMax Applications

Suitable for selected Mercury / Mariner V6 and OptiMax engines using this power trim anode.

Common horsepower ratings include:

• 135 HP – V6

• 150 HP – V6 / EFI / OptiMax

• 175 HP – V6 / EFI / OptiMax

• 200 HP – V6 / EFI / OptiMax

• 225 HP – V6 / EFI / OptiMax

• 250 HP – selected V6 / OptiMax

• 300 HP – selected high-performance applications

Newer FourStroke V6 / V8 Models

Also listed for selected:

• V6 3.4L FourStroke

• V8 4.6L FourStroke

Excluding Verado and Verado SeaPro versions in these newer V6/V8 applications.

Important Fitment Notes

Not every engine within the listed horsepower range uses this anode.

Compatibility depends on:

• Engine model and serial number

• Engine production year

• Power trim pump assembly

• Transom bracket configuration

• Original anode part number

Please confirm the original part number before ordering.

Replaces Mercury / Mariner Part Numbers

Main Reference

• 818298Q1

Additional References

• 43396A1

• 43396A2

• 8182981

• 818298A1

• 818298T1

• 97-818298Q1

• 97-818298T1

Related Bulk Pack Reference

• 97-8M0059343 – Mercury bulk-pack reference for this anode design

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

Product Details

• Product Type: Power Trim / Transom Bracket Anode

• Material: Zinc or Aluminium

• Application: Mercury / Mariner Outboards

• Horsepower: Selected 30–300 HP

• Engine Types: 2-Stroke and 4-Stroke

• Engine Families: Carburettor, EFI, V6, OptiMax and selected FourStroke

• Location: Bottom of external power trim pump assembly

• Purpose: Sacrificial corrosion protection

• Quality: Marine-grade aftermarket replacement

• Quantity: 1 anode

Package Includes

1 × Power Trim 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 production year and serial number

• Power trim assembly configuration

• Original anode part number

• Existing anode shape and mounting 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 power trim assembly before purchase.