Mercruiser Manifolds - Fit Question

pachanga27

Seaman Apprentice
Joined
Dec 3, 2010
Messages
48
My boat- 1989 Sea Ray Pachanga 27 - Twin Mercruiser 350 Magnums -
Question - I bought two sets of used Mercruiser manifolds and elbows to replace my manifolds and risers which were very corroded.
The manifolds came off a 1993 boat that was said to be Mercruiser 350s but when I looked up the part number stamped on the manifold - the description says 5.0/5.7 (305 and 350) and I was skeptical about using them. In the end I bought two sets new from a company (via iboats) as I needed the 6 inch riser extensions anyway and to make sure I had all the correct gaskets and bolts. In the end - the new sets fit perfect and I have these two sets of Mercruiser manifolds and elbows which are in very good shape - but I don't need. I want to sell them but I want to make sure I advertise correctly which the motors they will fit. Using the numbers cast into the manifold . 860246-C - besides going by Google - is there a definitive way to say ..these manifolds fit... which motors and which years?
 

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jimmbo

Supreme Mariner
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May 24, 2004
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12,944
They would actually fit the cylinder head of any 1st and 2rd generation small block chevy, including Vortec heads
 

Bondo

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Apr 17, 2002
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70,469
The manifolds came off a 1993 boat that was said to be Mercruiser 350s but when I looked up the part number stamped on the manifold - the description says 5.0/5.7 (305 and 350) and I was skeptical about using them.

Ayuh,.... SBCs, the 305, 'n 350 are exactly same, dimensionally, externally,....

Their exhaust manifolds are the same parts,....
 
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