Mercury MerCruiser Bravo Outdrives Sterndrives Marine Engines Service Manual Number 28

SERVICE MANUAL NUMBER 28
TROUBLESHOOTING
Testing Procedure for Corrosion Protection
1.
2.
Unplug shore power (if  equipped).
Measure hull potential with silver/silver chloride reference electrode and digital volt/ohm
meter.
READINGS
Potential
Diagnosis
Drive is corroding.
(Refer to “Drive Corroding”)
Below 850 millivolts
Saltwater
Between 850 - 1100
millivolts
Drive is protected
Drive is overprotected.
(Refer to “Drive Corroding”)
Above 1100 millivolts
Potential
Diagnosis
Drive is corroding.
(Refer to “Drive Corroding”)
Below 750 millivolts
Freshwater
Between 750 - 1050
millivolts
Drive is protected
Drive is overprotected.
(Refer to “Drive Corroding”)
Above 1050 millivolts
CORROSION SYMPTOMS
•
•
Paint blistering (usually on  sharp edges)
Loosely adhering white corrosion  products on exposed aluminum surfaces (do  not
confuse these with tenaciously  clinging calcium carbonate deposits)
•
Aluminum pitting
INDEX
90-863160
MAY 2000
Page 1C-33
Product Specification
CategoriesMercury MerCruiser Manuals
Tags
Model Year1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
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Mercury MerCruiser Bravo Outdrives Sterndrives Marine Engines Service Manual Number 28 SKU UPC Model
Andrew Hearn on Jul 25, 2018. missing information

I could not find any mention of the seawater pump assembly.
Maybe I have the wrong unit

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