2004 SR Johnson 4 Stroke 9.9-15HP Outboards Service Manual, Page 41Get this manual
PERIODIC MAINTENANCE ANODES AND BONDING WIRES
ANODES AND BONDING WIRES
INSPECT EVERY 50 HOURS (3 MONTHS)ANODES If 23 of anode has corroded away, replaceThe anode should be periodically cleaned with wire brush to ensure maximum effectiveness
IA CAUTION I
Never paint the anode
NOTE: The anode securing bolt should be covered with silicone seal