Located on the bottom of the external power trim pump assembly
Mercury and Mariner 30/40 FourStroke
40 hp (4-cyl), 50 hp (3-cyl 1987-1997)
55 hp (3-cyl), 60-90 hp (3-cyl 1987 and newer)
75 hp (4-cyl), 75/90 hp FourStroke
100-125 hp (4-cyl)
115 hp (6-cyl 1984-1988)
All V-6 and OptiMax outboard engines.
Lightweight aluminum material provides excellent anodic protection against galvanic corrosion.