SERVICE MANUAL NUMBER 28
CORROSION PROTECTION - ALL MODELS
Low Readings
Cause
Special Instructions
Loss of continuity between sterndrive unit Ensure that continuity devices are not
components and negative (-) battery
terminal.
missing or damaged and that connections
are clean and tight.
Shore power green safety grounding lead Disconnect shore power and verify if
not isolated from the power package
ground on boats equipped with shore
power.
reading increases. If so, install a
Quicksilver Isolator P/N 18478A2 or an
isolation transformer.
Underwater metal parts on the sterndrive Prime and paint underwater metal parts.
unit and/or boat are unpainted or the paint This will reduce the load on the anodes
is in poor condition. The boat has more
exposed metal than the anodes and/or
MerCathode system can protect.
and/or MerCathode system.
Anodes painted.
Remove paint or replace anodes.
The anodes are improperly grounded or
inactive.
Clean anode mounting surface or replace
anodes if they have oxidized.
Anodes consumed (no longer protect).
Replace anodes if eroded 50% or more.
Sterndrive unit and/or boat bottom painted Avoid any electrical interconnection
with anti-fouling paint containing copper or between the MerCruiser product, anodic
tin.
blocks, or MerCathode system and the
paint by allowing a minimum of 1-1/2 in.
(40
mm) of UNPAINTED area around
these items on the transom of the boat.
MerCathode reference electrode or anode Remove paint.
painted.
Anodic heads used instead of plastic caps. Reinstall the plastic caps.
No power to MerCathode controller.
Connect the positive (+) volt meter lead
(set on 0-20 volt scale) to the positive (+)
controller terminal and the negative (–)
volt meter lead to the negative (–)
terminal. The meter should indicate
battery voltage. Check for a blown fuse (if
equipped) on the starboard MerCathode
system. Clean the connection or repair
wiring as required.
Poor connection between reference
electrode lead (brown) or anode lead
(orange) and MerCathode controller.
Clean and/or tighten the connection.
Repair the wiring.
INDEX
90-863160
MAY 2000
Page 7A-19
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | MerCruiser Sterndrives 90-863160 |
| Model Year | 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 3 out of 3)
Marine readers have rated Mercury MerCruiser Bravo Outdrives Sterndrives Marine Engines Service Manual Number 28 3.0 out of 3.0 based on 1 product reviews. I could not find any mention of the seawater pump assembly.
Maybe I have the wrong unit