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Author Topic:   Sacrificial Anodes: Electrical Connection
jimh posted 06-23-2006 08:59 AM ET (US)   Profile for jimh   Send Email to jimh  
In order for sacrificial anodes to properly protect the aluminum of your expensive outboard motor, they must be bonded electrically to the engine block and the battery negative terminal. Check the sacrificial anode(s) on your boat to verify that they are still connected electrically to the engine block and hence to the battery negative terminal. Use a reliable ohmmeter to measure the resistance between the engine chassis and the sacrificial anode(s). The resistance should be extremely low, less than 1-ohm and typically near zero resistance.

Also, most engines have small gauge flexible conductors which bond moveable portions of the engine mount to the main structure of the engine. Be sure these wires are intact.

crabby posted 06-25-2006 11:52 PM ET (US)     Profile for crabby  Send Email to crabby     
Good point for those that don't think of these things. Thanks Jim.

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