43
ROUTINE SERVICE
ANTI-CORROSION PROTECTION
2
ANTI-CORROSION
PROTECTION
Sacrificial Anodes
Galvanic
corrosion occurs in fresh or salt water.
Salt, brackish, and polluted water can accelerate
corrosion. “Sacrificial” anodes are intended to pro-
tect the underwater metal components of the out-
board from galvanic corrosion.
Outboards are equipped with three sacrificial
anodes.
Visually inspect anodes and metal components
below water level. Erosion of anodes is normal
and indicates the anodes are functioning properly.
IMPORTANT:
Anodes that are not eroding may
not be properly grounded. Anodes and the mount-
ing screws must be clean and tight for effective
corrosion protection.
For best anode performance:
•
Replace all anodes that have eroded or disinte-
grated to two-thirds of their original size
•
Do not paint or apply protective coatings to
anodes or anode fasteners
•
Avoid using metal-based antifouling paint on the
boat or outboard.
Testing Procedure – Continuity
Connect ohmmeter leads between engine ground
and anode surface.
The meter should show little or no resistance. If
resistance is high, check the following:
•
Remove the anode and clean the area where
the anode is installed
•
Clean the mounting screws
•
Install the anode and test again.
Metallic Component Protection
Protect metal components on outboards from cor-
rosion. Use the following products to minimize
corrosion:
•
Anti-Corrosion Spray
provides a heavy, waxy
coating to protect components
•
“6 in 1” Multi-Purpose Lubricant
provides a thin
film of anti-corrosion protection.
Exterior Finishes
Maintain the outboard’s exterior finish to prevent
corrosion and reduce oxidation:
•
Use automotive wax to protect the outboard’s
exterior finish from oxidation
•
Clean regularly using clean water and mild
detergent soap
•
Touch-up damage to painted surfaces promptly.
•
Protect moving components with appropriate
lubricants.
1.
Stern bracket anode
2.
Propeller shaft bearing housing anode
(inside of gearcase housing)
3.
Gearcase housing anode
DR5082
3
2
1
1.
Meter lead to anode
000677
1
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