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Go Back   SailNet Community > On Board > Gear & Maintenance > Engines > Diesel
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Diesel This is a forum dedicated to diesel engines and their applicable accessories.


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Old 01-05-2013
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Ground wire question

While tightening belts today i noticed that the ground wire, which was connected to the mounting bolt for the raw water pump was snipped before it reaches the batt. Any idea why the previous owner would have cut the ground? Could it have been interfering with other equipment somehow? Is a ground to the engine required?
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Old 01-05-2013
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Re: Ground wire question

Yes, it is very necessary.
Make sure there is a ground wire from the engine block directly to the battery and make sure it is of the same size as the one from the battery to your starter.
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Old 01-07-2013
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Re: Ground wire question




I may have incorrectly described the wire I was talking about...
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Old 01-07-2013
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Re: Ground wire question

It looks like that was a small ground wire from some other electrical item using your Yanmar as a ground. The other item might be gone now. Probably not a problem.
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Old 01-11-2013
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Re: Ground wire question

I agree with arf145. The engine ground is probably thicker than a pencil, usually close buy the starter.

There is also a possibility that the wire cracked as a result of engine vibrations. Look for a loose wire in the area. Is there something that is not working?

The engine is not a good place to connect accessories. Also, that is why it is a good idea to clean up after making modifications (in this case remove the connector).
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Old 01-11-2013
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Re: Ground wire question

Could this be a bonding wire connecting the engine into the protective ground system?
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It's def not the engine ground. I know the only equip the PO removed was a water heater, maybe that's the culprit?
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Old 01-12-2013
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Re: Ground wire question

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Originally Posted by hillenme View Post
It's def not the engine ground. I know the only equip the PO removed was a water heater, maybe that's the culprit?
Unlikely -- the water heater would have been a 110v appliance, and the ground wire should have been green. Of course, there's no guarantee that a jumper wasn't used, but still...

Bottom line: If everything's working OK now, then that's just an extra ring terminal that is serving no function.
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