Plates between manifolds and risers, Mercruiser

DAN0

Seaman Apprentice
Joined
Aug 30, 2004
Messages
32
Hi,
My 898 Mercruiser has plates sandwiched between gaskets between the
exhaust manifolds and risers. These plates come in two versions. Does
anyone know their purpose?
 

Don S

Honorary Moderator Emeritus
Joined
Aug 31, 2004
Messages
62,321
Re: Plates between manifolds and risers, Mercruiser

The plates (usually with no coolant passage holes) seperate the manifold from the risers when the manifolds are part of the closed cooling system. With antifreeze in the manifolds and engine.
 

Bondo

Moderator
Staff member
Joined
Apr 17, 2002
Messages
71,082
Re: Plates between manifolds and risers, Mercruiser

These plates come in two versions.

Ayuh,..... Which 2 Versions,..??..??
 
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