MAINTENANCE
Page 1B-6 90-828631R3 MARCH 1999
Corrosion Control Anode
Your outboard has control anodes at different locations. An anode helps protect the out-
board against galvanic corrosion by sacrificing its metal to be slowly eroded instead of the
outboard metals.
Each anode requires periodic inspection especially in salt water which will accelerate the
erosion. To maintain this corrosion protection, always replace the anode before it is com-
pletely eroded. Never paint or apply a protective coating on the anode as this will reduce
effectiveness of the anode.
1. An anode is installed on the bottom of the transom bracket assembly. Trim tab is also
an anode on the 3-1/4 in. (83 mm) diameter gear case. The 4-1/4 in. (108 mm) diameter
gear case has three anodes. One of the anodes is the trim tab and two anodes are lo-
cated on the side.
a
b
c
a-Bottom Anode
b-Trim Tab
c-Side Anodes
2. Four anodes are installed in the engine block. Remove anodes at locations shown.
Install each anode with rubber seal and cover. Torque bolts to specified torque.
a
b
c
a-Anodes-Engine Block
b-Rubber Seal
c-Cover
Bolt Torque
70 lb-in. (8 Nm)
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