what exhaust casting numbers can I use on my 1991 mercruiser 350 5.7L?

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scooby333

Cadet
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Jul 31, 2011
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I have to replace my starboard side exhaust manifold. The casting number is 87114BC2. I see a lot of manifolds that look like mine but the casting codes are

87114
860246
87114 C2
87114A19

Can I use any exhaust manifold for a 350 5.7L from the years of 1983 -2002?

Dan
 

Bt Doctur

Supreme Mariner
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Aug 29, 2004
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19,291
In most applications you replace both manifolds at the same time
If your talking standard, 3 or 4 inch center rise manifolds, Yes
if your talking dry joint manifolds, Yes
 

achris

More fish than mountain goat
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May 19, 2004
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27,468
Post the engine serial number and we can get you the exact part number for the right manifold. Casting numbers aren't used within the Merc parts system. ...

Chris. ...
 

SeaRay 195

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Oct 3, 2024
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I’ve got a similar question, regarding exhaust manifold compatibility:

I have a 1981 Sea Ray SRV 195 with The Mercruiser Serial Number 5849269.

The exhaust manifolds I am replacing have the numbers 87114 BC2 stamped on them.

I’ve noticed that many mercruiser exhaust manifolds have a time period (1983-2002) connected to them. Would manifolds with this time period compatibility suffice with my engine?

I’m having difficulty finding exhaust manifold replacements for my 1978-1982 manufactured engine.

Thank You!
 

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