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.

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