Oil / Power Steering / Transmission Fluid Coolers; General Information - Mercury MerCruiser D2.8L D-Tronic Service Manual

SERVICE MANUAL NUMBER 22

Oil / Power Steering / Transmission Fluid Coolers

General Information

Cooling efficiency of an engine and components is greatly dependent upon heat transfer
through the tubes within the coolers (heat exchanger or exchangers, if equipped with more
than one). During engine operation, contaminants within the seawater (such as salt, silt or
lime) collect on the inside of the tubes, thus reducing heat transfer and greatly decreasing
cooler (heat exchanger) efficiency.
It is therefore, recommended that the seawater coolers be cleaned periodically according
to Maintenance Schedules chart in SECTION 1B, or whenever decreased cooling efficiency
is suspected.
Additionally, inspect cooler hoses and clamps according to Maintenance Schedules chart
in SECTION 1B.
90-860074--1 FEBRUARY 2002
SEAWATER COOLING SYSTEM
Page 6A-31