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 Post subject: Bad ground?
PostPosted: Sat Jul 03, 2021 10:01 am 
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Joined: Tue Jun 26, 2007 10:46 pm
Posts: 1146
Location: San Diego, CA
Recently I've noticed that when I raise my engine cover (electric), my radio cuts out as soon as I hit the switch, and comes back on a second or two after I stop. I'm assuming it's because of the draw of the motor, but I don't recall that ever happening before so am thinking it may be a a grounding or other connectivity issue....

Any thoughts?

Thanks!

Erik

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 Post subject: Re: Bad ground?
PostPosted: Sat Jul 03, 2021 2:58 pm 
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Joined: Thu Jun 29, 2006 10:26 pm
Posts: 5661
Location: Long Island NY
It may be that the motor draws a lot of current and if there is any corrosion in the terminals for it or the batteries it will drop the system voltage enough to make that happen. I used to get this with the trim system on my '88 OMC Cobra, when I would trim the voltmeter on the dash would drop and the engine would stutter as the ignition was being starved for voltage. That was cured by all new battery cables and cleaning all the terminals for the trim relays.

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2002 Walker Bay 10/2012 Suzuki 2.5
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 Post subject: Re: Bad ground?
PostPosted: Sat Jul 03, 2021 5:10 pm 
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Location: San Diego, CA
Thanks Lou - time to go digging and do some general maintenance.

Erik

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 Post subject: Re: Bad ground?
PostPosted: Tue Jul 06, 2021 10:32 am 
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Sting Ray
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Joined: Sun Aug 24, 2014 10:27 pm
Posts: 60
Location: fresno ca.
I had A lot of electrical problems that were traced to loose grounds on the back of my starboard side cylinder head

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 Post subject: Re: Bad ground?
PostPosted: Tue Jul 06, 2021 11:41 am 
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Location: San Diego, CA
signalstan wrote:
I had A lot of electrical problems that were traced to loose grounds on the back of my starboard side cylinder head

Thanks for the tip!

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2003 Tahoe


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 Post subject: Re: Bad ground?
PostPosted: Tue Jul 06, 2021 8:00 pm 
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Joined: Thu Jun 29, 2006 10:26 pm
Posts: 5661
Location: Long Island NY
Usually on these engines the battery negatives connect to a stud on the bell housing; hard to see behind the exhaust system. If you have wingnuts on your battery terminals get rid of then they get loose and cause problems. Use locking nuts or bolt on marine grade battery clamps and use the large posts. That’s what I do, no problems in over 15 years.

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88 Four Winns 200 Horizon
4.3 OMC Cobra-4bbl
2002 Walker Bay 10/2012 Suzuki 2.5
2008 Walker Bay 8

1998 Jeep Grand Cherokee 4.0/Selectrac
2007 Jeep Grand Cherokee 5.7 Hemi/Quadradrive II


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