A magnesium trim tab anode for Honda, Mercury outboard & Mercruiser sterndrive and engines. Thread fitting 7/16" UNC. Replaces part 31640. Equivalent to old part CM31640M. Same as Tecnoseal part number 00800MG and 01101-1MG.

The trim tab anode is manufactured to US MIL Spec by Tecnoseal in Italy, one of the world's leading suppliers of sacrificial anodes for cathodic protection in the leisure boat market.

Every magnesium anode sold by Anode Outlet is genuine and manufactured to the highest quality anode specification. Item(s) shown in image may not come in manufacturers' branded packaging due to production processes.

Fits the following:

Mercury: 31640T4 (fits Alpha 1, 120, 140, 470, 485 R, MR), Mercury 50hp.
Honda: 41107-ZW1-003-ZA. Fits Honda BF75AT/AW, BF90AT/AW.
Mariner 40/60 HP built after 1991. Mariner part number 679-45251-00.

Specifications:

Please refer to the diagram in the product images.
h: 61mm.
h1: 19mm.
Ø: 91mm.
Weight: 0.12kg.

Useful Links:

Category: Explore our full range of trim tab anodes for outboard engines.
Blog: Fitting anodes to trim tabs and rudders.
Blog: How often should a sacrificial anode be replaced on a boat?
Blog: Cathodic protection for boats.