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Author Topic:   Grounding Electrode

jimku posted 11-14-2003 06:59 AM ET (US)
I have a 1993 OUTRAGE 22. Should there be a grounding electrode on the transom? I do not have one, nor is there any evidence of ever having one.
jimh posted 11-14-2003 08:20 AM ET (US)
For many years Boston Whaler used a bronze circular electrode (about the size of a silver dollar) mounted on the starboard outboard side of the transom below the static waterline, and to it was bonded by 10-AWG green insulated wire all the metalic components of the fuel system, i.e., the internal aluminum tank and the fuel fill fitting.
In c.1992 they stopped using that electrode and instead connected the fuel system bonding wire to the battery negative terminal, where by parallel connection to the aluminum structure of the outboard motor it would similarly make connection to the seawater.
Marc posted 11-14-2003 01:22 PM ET (US)
Jimh must have snuck into my garage and looked at the electrode setup I have on my 91' Outrage. Described it to the T. The only difference is that my bronze electrode no longer looks bronze, more like a corroded silver dollar!
So it looks like Jimku's question is aswered since he has a post 92 Whaler...
Marc
doobee posted 11-15-2003 12:20 AM ET (US)
The disk shaped grounding plate was offered by Tempo (part # 040050, model # 117TGD)but I'm not sure if they still make it. I may be able to get some if anybody wants one. If you paint the bottom of your boat, don't paint the disk!
Guest also offers a grounding plate but it is larger and more expensive.
jimh posted 11-15-2003 08:35 AM ET (US)
A detail of the bonding wiring: the internal aluminum fuel tank typically has a circular plate in the rear which accommodates the fuel pickup fittings and hoses. This plate is typically attached with a rubber gasket to the tank. The bonding line is connected to this plate, too, so that it is held at the same potential as the rest of the fuel system.

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Author	Topic: Grounding Electrode
jimku	posted 11-14-2003 06:59 AM ET (US) I have a 1993 OUTRAGE 22. Should there be a grounding electrode on the transom? I do not have one, nor is there any evidence of ever having one.
jimh	posted 11-14-2003 08:20 AM ET (US) For many years Boston Whaler used a bronze circular electrode (about the size of a silver dollar) mounted on the starboard outboard side of the transom below the static waterline, and to it was bonded by 10-AWG green insulated wire all the metalic components of the fuel system, i.e., the internal aluminum tank and the fuel fill fitting. In c.1992 they stopped using that electrode and instead connected the fuel system bonding wire to the battery negative terminal, where by parallel connection to the aluminum structure of the outboard motor it would similarly make connection to the seawater.
Marc	posted 11-14-2003 01:22 PM ET (US) Jimh must have snuck into my garage and looked at the electrode setup I have on my 91' Outrage. Described it to the T. The only difference is that my bronze electrode no longer looks bronze, more like a corroded silver dollar! So it looks like Jimku's question is aswered since he has a post 92 Whaler... Marc
doobee	posted 11-15-2003 12:20 AM ET (US) The disk shaped grounding plate was offered by Tempo (part # 040050, model # 117TGD)but I'm not sure if they still make it. I may be able to get some if anybody wants one. If you paint the bottom of your boat, don't paint the disk! Guest also offers a grounding plate but it is larger and more expensive.
jimh	posted 11-15-2003 08:35 AM ET (US) A detail of the bonding wiring: the internal aluminum fuel tank typically has a circular plate in the rear which accommodates the fuel pickup fittings and hoses. This plate is typically attached with a rubber gasket to the tank. The bonding line is connected to this plate, too, so that it is held at the same potential as the rest of the fuel system.