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Fitting new stainless exhaust manifolds to mercruiser 8.1

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Fitting new stainless exhaust manifolds to mercruiser 8.1

Old 08-11-2022, 02:21 AM
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Default Fitting new stainless exhaust manifolds to mercruiser 8.1

Hi there boating enthusiasts,
I need some help connecting up some new raw water cooled stainless exhaust manifolds to my mercruiser 496 engine. There seems to be tee joints and all sorts of plumbing at the bottom of the original dry joint exhaust manifolds!
Just need to know what gets bypassed and how I connect it up. The new manifolds only have one hose attach point at the bottom. Has anyone done this swap of exhausts before?
Any help would be much appreciated
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Old 08-11-2022, 07:41 AM
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Pictures of what you have would help with guidance.
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Old 08-12-2022, 01:55 AM
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I'm a new member so I can't add photos unfortunately.
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Old 08-12-2022, 06:56 AM
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Only takes 10 posts, so post whore 8 more.
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Old 08-12-2022, 06:57 AM
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Like this
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Old 08-12-2022, 06:58 AM
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And this.
So on and so forth.
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Old 08-12-2022, 07:04 AM
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I'm hearing you!
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Old 08-12-2022, 07:10 AM
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Was hoping it was a common swap, doesn't seem like anyone has swapped their manifolds out.
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Old 08-14-2022, 01:40 PM
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OP,

which manifolds/exhaust did you get? Im about to do this on my 496 stroker.
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Old 08-14-2022, 02:35 PM
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I got the Hi-tek manifolds, these are Australian made. I worked out what to do now! The tee fitting bellow the original manifolds is just a manifold drain.
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