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Kdmann64

Boat smells like sewage when driving

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Kdmann64

2011 Malibu vlx with 350 hp,

just bought it. While driving across lake we smell "sewer smell" like rotten eggs. It goes away when you stop 

why is this and what do I do ?  

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teamerickson

Carpet?

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Kdmann64

No.  It's like when a old car passes you on the interstate and has that catalytic converter rotten egg smell.  Nothing in or on the boat smells 

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05hammerhead

Id assume you have an exhaust leak, and youll only notice it when the engine is running hard putting pressure on the exhaust. 

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John I.

Have you looked around the engine compartment? Fluid leak,  dead rodent, anything that might start "cooking" when the engine is running. Otherwise, I think 05hammerhead is on the right track with an exhaust leak. Does your boat have Cats? 

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Rednucleus

Reminds me of an old Seinfeld episode and Jerry's smelly car. Hope your experience is better than his!

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Sixball

How do the spark plugs look. I might give it a good run and let the cats burn for a time. Was the boat being used? Or has it been sitting for a time? Have you checked for any codes. It does sound like the cats. Did you fill with fresh fuel if the boat has been sitting?  Need some history on the boat. How many hours on the engine?  sounds like a bad air fuel ratio,

Edited by Sixball

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23LSVOwner

LfDjbmb.jpg

 

Sorry, couldn't resist!

Edited by 23LSVOwner

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05hammerhead

Ill also do the standard and ask 

 

Did you drive it before you bought it?

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G Spot

Do you smell it when you open the bilge?

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teamerickson

Any standing water in the front bilge near the front tanks? Maybe some fuel drippings in there?

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brookss1

I have the same issue and I was wondering if it might be the bilge that is smelling. I think it is the airflow when you are underway that makes the odour come out into the cabin. I’m going to clean mine and see what happens. 

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