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4788 04 Oct 2017 19:42 #1

  • brokership1
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On my 4788 w/330's I'm having an issue with enough voltage to activate the glow plug on the port engine. The battery is new. If I turn the battery charger on for a couple minutes the glow plug lights right up. Doesn't seem to be an issue with the starboard engine. It's been this way for a long time. Any suggestions?
Thanks

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4788 04 Oct 2017 20:17 #2

  • smitty477
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brokership1 wrote: On my 4788 w/330's I'm having an issue with enough voltage to activate the glow plug on the port engine. The battery is new. If I turn the battery charger on for a couple minutes the glow plug lights right up. Doesn't seem to be an issue with the starboard engine. It's been this way for a long time. Any suggestions?
Thanks


Could be a poor engine ground - temporarily jump the engine ground to the battery with jumper cables and see if the problem goes away. If it does you know you are looking for a poor ground connection and/or cable.

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Northport NY

4788 04 Oct 2017 22:12 #3

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Good suggestion. I will try that.
Thanks

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4788 04 Oct 2017 22:52 #4

  • higgins_jr
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Brokership, I guess you're talking about the "Pre Heat" light on the dash next to the ignition key. There aren't any glow plugs on my Cummins 6Bta5.9. But Smittys advice is on the money. See if that works.

Cheers

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John H
Brisbane QLD Aust
"Harbor-nating"

2000 - 4788/Cummins 370's

4788 05 Oct 2017 01:22 #5

  • cosmo777
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I'm guessing your seeing a harder start of the port engine vs starboard or you're seeing more smoke from port once they're both started?
Both are symptoms of relays (qty 2) that are upstream of the preheaters, which if one or the other or both are bad then your preheater will not operate correctly.
For the port engine, they are easy to reach and test if they are bad and/or replace. Not so easy with Starboard.

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Pat
Paragon
1999 4788

4788 05 Oct 2017 13:01 #6

  • SuperiorDiver
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Check ground wires as Smitty suggested. It was an issue on our 4087, similar to yours .

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