Mercury D4.2L - Corrosion and Corrosion Protection

99
CD119
Corrosion And Corrosion Protection
INTERNAL COMPONENTS
1 There are anodes as part of the intercooler and heat exchanger systems, which serves as a sacrificial anodes.
Replace when eroded more than 50%; check at least once yearly.
A Length When New - 3/4 in. (19mm)
B Diameter When New - 5/8 in. (15mm)