MAINTENANCE
Page 1B-6 90-857046R1 NOVEMBER 2001
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. On the 3-1/4 in.
(83 mm) diameter gear case the trim tab is also an anode. The 4-1/4 in. (108 mm) diame-
ter (Bigfoot) gear case has three anodes. One of the anodes is the trim tab and two
anodes (one on each side) are located on the side of the housing.
b
c
a
a-Bottom Anode
b-Trim Tab
c-Side Anodes (Big Foot Models Only)
MANUAL START MODELS S/N OT426439 AND BELOW
ELECTRIC START MODELS S/N OT427437 AND BELOW
2. Three anodes are installed in the engine block. Remove the three ignition coils for clear-
ance. Remove anodes at locations shown. Install each anode with rubber seal and
cover. Tighten screws to 70 lb-in. (8 Nm) torque. Reinstall the ignition coils. Tighten coil
screws to 70 lb-in. (8 Nm) torque
b
a
c
d
a-Anodes-Engine Block
b-Ignition Coils
c-Rubber Seal
d-Cover
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